https://hfunderground.com/wiki/index.php?action=history&feed=atom&title=11_meter 2026-10-21T22:18:00Z Revision history for this page on the wiki MediaWiki 1.16.5 https://hfunderground.com/wiki/index.php?title=11_meter&diff=18784&oldid=prev 2026-09-14T19:19:49Z

<p>Additional clarification on UK FM CB band for 11 meter page (linking to other HFU Wiki pages)</p> <table style="background-color: white; color:black;"> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 19:19, 14 September 2026</td> </tr><tr><td colspan="2" class="diff-lineno">Line 3:</td> <td colspan="2" class="diff-lineno">Line 3:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>11 meters is often defined as 25-28 MHz / 25000-28000 kHz or 26-28 MHz / 26000-28000 kHz.&nbsp; &nbsp;</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>11 meters is often defined as 25-28 MHz / 25000-28000 kHz or 26-28 MHz / 26000-28000 kHz.&nbsp; &nbsp;</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>It is rarely used to refer to the basically never-used 11 meter shortwave broadcast band [[Shortwave_Broadcast_Bands|roughly defined internationally]] as 25670 kHz to 26100 kHz or 25.67 MHz to 26.1 MHz. <del class="diffchange diffchange-inline"> </del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>It is rarely used to refer to the basically never-used 11 meter shortwave broadcast band [[Shortwave_Broadcast_Bands|roughly defined internationally]] as 25670 kHz to 26100 kHz or 25.67 MHz to 26.1 MHz.</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[CB#Origins_and_Historical_Babble_-_1950s_and_beyond|The original]] 11 meter [[Amateur_radio|amateur radio]] allocation was 26.96 MHz to 27.23 MHz and it was from this that the original Class D CB service was born.&nbsp; &nbsp;</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[CB#Origins_and_Historical_Babble_-_1950s_and_beyond|The original]] 11 meter [[Amateur_radio|amateur radio]] allocation was 26.96 MHz to 27.23 MHz and it was from this that the original Class D CB service was born.&nbsp; &nbsp;</div></td></tr> </table>

R4002 https://hfunderground.com/wiki/index.php?title=11_meter&diff=18783&oldid=prev 2026-09-14T19:19:07Z

<p><span class="autocomment">Legal Users of the 25-30 MHz Spectrum</span></p> <table style="background-color: white; color:black;"> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 19:19, 14 September 2026</td> </tr><tr><td colspan="2" class="diff-lineno">Line 127:</td> <td colspan="2" class="diff-lineno">Line 127:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|27.59625 MHz to 27.99625 MHz</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|27.59625 MHz to 27.99625 MHz</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|27596.25 kHz to 27996.25 kHz</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|27596.25 kHz to 27996.25 kHz</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>|Citizen's Band - CB radio - United Kingdom UK CB 27/81 UK FM CB 27.60125 MHz - 27.99125 MHz 40 channels</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>|Citizen's Band - CB radio - <ins class="diffchange diffchange-inline">[[CB#UK_CB_.2227.2F81.22_Frequencies|</ins>United Kingdom UK CB 27/81 UK FM CB 27.60125 MHz - 27.99125 MHz 40 channels<ins class="diffchange diffchange-inline">]]</ins></div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|-</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|-</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|27.600 MHz to 28.0 MHz</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|27.600 MHz to 28.0 MHz</div></td></tr> </table>

R4002 https://hfunderground.com/wiki/index.php?title=11_meter&diff=18744&oldid=prev 2026-09-11T13:29:51Z

<p><span class="autocomment">Legal Users of the 25-30 MHz Spectrum - Frequencies To Avoid</span></p> <table style="background-color: white; color:black;"> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 13:29, 11 September 2026</td> </tr><tr><td colspan="2" class="diff-lineno">Line 223:</td> <td colspan="2" class="diff-lineno">Line 223:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.750 MHz 26750 kHz - Military use &nbsp;</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.750 MHz 26750 kHz - Military use &nbsp;</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.850 MHz 26850 kHz - Military use</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.850 MHz 26850 kHz - Military use</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>*26.900 MHz 26900 kHz - Paging (Europe)</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>*26.900 MHz 26900 kHz - <ins class="diffchange diffchange-inline">[[HF_pagers#Frequency_List|</ins>Paging (Europe)<ins class="diffchange diffchange-inline">]]</ins></div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.945 MHz 26945 kHz - Data links, paging, telemetry, alarms (Russia) &nbsp;</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.945 MHz 26945 kHz - Data links, paging, telemetry, alarms (Russia) &nbsp;</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.950 MHz 26950 kHz - International fixed service, also paging</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.950 MHz 26950 kHz - International fixed service, also paging</div></td></tr> </table>

R4002 https://hfunderground.com/wiki/index.php?title=11_meter&diff=18743&oldid=prev 2026-09-11T13:28:27Z

<p><span class="autocomment">Legal Users of the 25-30 MHz Spectrum - Frequencies To Avoid</span></p> <table style="background-color: white; color:black;"> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 13:28, 11 September 2026</td> </tr><tr><td colspan="2" class="diff-lineno">Line 199:</td> <td colspan="2" class="diff-lineno">Line 199:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Many of these frequencies are only technically allocated, but are rarely used due to the heavy CB radio and out of band or freeband CB radio traffic on/near them.&nbsp; &nbsp;</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Many of these frequencies are only technically allocated, but are rarely used due to the heavy CB radio and out of band or freeband CB radio traffic on/near them.&nbsp; &nbsp;</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del style="color: red; font-weight: bold; text-decoration: none;"></del></div></td><td colspan="2">&nbsp;</td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del style="color: red; font-weight: bold; text-decoration: none;"></del></div></td><td colspan="2">&nbsp;</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> </table>

R4002 https://hfunderground.com/wiki/index.php?title=11_meter&diff=18742&oldid=prev 2026-09-11T13:28:22Z

<p><span class="autocomment">Legal Users of the 25-30 MHz Spectrum - Frequencies To Avoid</span></p> <table style="background-color: white; color:black;"> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 13:28, 11 September 2026</td> </tr><tr><td colspan="2" class="diff-lineno">Line 215:</td> <td colspan="2" class="diff-lineno">Line 215:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.157 MHz 26157 kHz - HF SSB Marine Channel 2505</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.157 MHz 26157 kHz - HF SSB Marine Channel 2505</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.160 MHz 26160 kHz - HF SSB Marine Channel 2506</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.160 MHz 26160 kHz - HF SSB Marine Channel 2506</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>*26.163 MHz 26163 kHz - HF SSB Marine Channel 2507 <del class="diffchange diffchange-inline">- Coast Stations: 26163 kHz 26.163 MHz - Ship Stations: 25088 kHz 25.088 MHz</del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>*26.163 MHz 26163 kHz - HF SSB Marine Channel 2507</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.166 MHz 26166 kHz - HF SSB Marine Channel 2508</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.166 MHz 26166 kHz - HF SSB Marine Channel 2508</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.169 MHz 26169 kHz - HF SSB Marine Channel 2509</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.169 MHz 26169 kHz - HF SSB Marine Channel 2509</div></td></tr> </table>

R4002 https://hfunderground.com/wiki/index.php?title=11_meter&diff=18741&oldid=prev 2026-09-11T13:28:16Z

<p><span class="autocomment">Legal Users of the 25-30 MHz Spectrum - Frequencies To Avoid</span></p> <table style="background-color: white; color:black;"> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 13:28, 11 September 2026</td> </tr><tr><td colspan="2" class="diff-lineno">Line 216:</td> <td colspan="2" class="diff-lineno">Line 216:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.160 MHz 26160 kHz - HF SSB Marine Channel 2506</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.160 MHz 26160 kHz - HF SSB Marine Channel 2506</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.163 MHz 26163 kHz - HF SSB Marine Channel 2507 - Coast Stations: 26163 kHz 26.163 MHz - Ship Stations: 25088 kHz 25.088 MHz</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.163 MHz 26163 kHz - HF SSB Marine Channel 2507 - Coast Stations: 26163 kHz 26.163 MHz - Ship Stations: 25088 kHz 25.088 MHz</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>*26.166 MHz 26166 kHz - HF SSB Marine Channel 2508 <del class="diffchange diffchange-inline">- Coast Stations: 26166 kHz 26.166 MHz - Ship Stations: 25091 kHz 25.091 MHz</del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>*26.166 MHz 26166 kHz - HF SSB Marine Channel 2508</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.169 MHz 26169 kHz - HF SSB Marine Channel 2509</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.169 MHz 26169 kHz - HF SSB Marine Channel 2509</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.172 MHz 26172 kHz - HF SSB Marine Channel 2510</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.172 MHz 26172 kHz - HF SSB Marine Channel 2510</div></td></tr> </table>

R4002 https://hfunderground.com/wiki/index.php?title=11_meter&diff=18740&oldid=prev 2026-09-11T13:28:09Z

<p><span class="autocomment">Legal Users of the 25-30 MHz Spectrum - Frequencies To Avoid</span></p> <table style="background-color: white; color:black;"> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 13:28, 11 September 2026</td> </tr><tr><td colspan="2" class="diff-lineno">Line 211:</td> <td colspan="2" class="diff-lineno">Line 211:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.145 MHz 26145 kHz - HF SSB Marine Channel 2501</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.145 MHz 26145 kHz - HF SSB Marine Channel 2501</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.148 MHz 26148 kHz - HF SSB Marine Channel 2502</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.148 MHz 26148 kHz - HF SSB Marine Channel 2502</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>*26.151 MHz 26151 kHz - HF SSB Marine Channel 2503 <del class="diffchange diffchange-inline">- Coast Stations: </del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>*26.151 MHz 26151 kHz - HF SSB Marine Channel 2503</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>*26.154 MHz 26154 kHz - HF SSB Marine Channel 2504 <del class="diffchange diffchange-inline">- Coast Stations: </del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>*26.154 MHz 26154 kHz - HF SSB Marine Channel 2504</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>*26.157 MHz 26157 kHz - HF SSB Marine Channel 2505 <del class="diffchange diffchange-inline">- Coast Stations:&nbsp; - Ship Stations: 25082 kHz 25.082 MHz</del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>*26.157 MHz 26157 kHz - HF SSB Marine Channel 2505</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>*26.160 MHz 26160 kHz - HF SSB Marine Channel 2506 <del class="diffchange diffchange-inline">- Coast Stations: 26160 kHz 26.160 MHz - Ship Stations: 25085 kHz 25.085 MHz</del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>*26.160 MHz 26160 kHz - HF SSB Marine Channel 2506</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.163 MHz 26163 kHz - HF SSB Marine Channel 2507 - Coast Stations: 26163 kHz 26.163 MHz - Ship Stations: 25088 kHz 25.088 MHz</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.163 MHz 26163 kHz - HF SSB Marine Channel 2507 - Coast Stations: 26163 kHz 26.163 MHz - Ship Stations: 25088 kHz 25.088 MHz</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.166 MHz 26166 kHz - HF SSB Marine Channel 2508 - Coast Stations: 26166 kHz 26.166 MHz - Ship Stations: 25091 kHz 25.091 MHz</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.166 MHz 26166 kHz - HF SSB Marine Channel 2508 - Coast Stations: 26166 kHz 26.166 MHz - Ship Stations: 25091 kHz 25.091 MHz</div></td></tr> </table>

R4002 https://hfunderground.com/wiki/index.php?title=11_meter&diff=18739&oldid=prev 2026-09-11T13:27:51Z

<p><span class="autocomment">Legal Users of the 25-30 MHz Spectrum - Frequencies To Avoid</span></p> <table style="background-color: white; color:black;"> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 13:27, 11 September 2026</td> </tr><tr><td colspan="2" class="diff-lineno">Line 210:</td> <td colspan="2" class="diff-lineno">Line 210:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.100 MHz 26100 kHz - 26100.5 kHz - Marine Safety Information - HF marine allocation &nbsp;</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.100 MHz 26100 kHz - 26100.5 kHz - Marine Safety Information - HF marine allocation &nbsp;</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.145 MHz 26145 kHz - HF SSB Marine Channel 2501</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.145 MHz 26145 kHz - HF SSB Marine Channel 2501</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>*26.148 MHz 26148 kHz - HF SSB Marine Channel 2502 <del class="diffchange diffchange-inline">- Coast Stations: </del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>*26.148 MHz 26148 kHz - HF SSB Marine Channel 2502</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.151 MHz 26151 kHz - HF SSB Marine Channel 2503 - Coast Stations: &nbsp;</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.151 MHz 26151 kHz - HF SSB Marine Channel 2503 - Coast Stations: &nbsp;</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.154 MHz 26154 kHz - HF SSB Marine Channel 2504 - Coast Stations: &nbsp;</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.154 MHz 26154 kHz - HF SSB Marine Channel 2504 - Coast Stations: &nbsp;</div></td></tr> <tr><td colspan="2" class="diff-lineno">Line 217:</td> <td colspan="2" class="diff-lineno">Line 217:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.163 MHz 26163 kHz - HF SSB Marine Channel 2507 - Coast Stations: 26163 kHz 26.163 MHz - Ship Stations: 25088 kHz 25.088 MHz</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.163 MHz 26163 kHz - HF SSB Marine Channel 2507 - Coast Stations: 26163 kHz 26.163 MHz - Ship Stations: 25088 kHz 25.088 MHz</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.166 MHz 26166 kHz - HF SSB Marine Channel 2508 - Coast Stations: 26166 kHz 26.166 MHz - Ship Stations: 25091 kHz 25.091 MHz</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.166 MHz 26166 kHz - HF SSB Marine Channel 2508 - Coast Stations: 26166 kHz 26.166 MHz - Ship Stations: 25091 kHz 25.091 MHz</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>*26.169 MHz 26169 kHz - HF SSB Marine Channel 2509 <del class="diffchange diffchange-inline">- Coast Stations:&nbsp; - Ship Stations: 25094 kHz 25.094 MHz</del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>*26.169 MHz 26169 kHz - HF SSB Marine Channel 2509</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>*26.172 MHz 26172 kHz - HF SSB Marine Channel 2510 <del class="diffchange diffchange-inline">- Coast Stations:&nbsp; - Ship Stations: 25097 kHz 25.097 MHz</del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>*26.172 MHz 26172 kHz - HF SSB Marine Channel 2510</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.575 MHz 26575 kHz - Military use - [[Emission_Designator|emissions]] 6K00B9W and 9K00B9W only</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.575 MHz 26575 kHz - Military use - [[Emission_Designator|emissions]] 6K00B9W and 9K00B9W only</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.617 MHz 26617 kHz - Civil Air Patrol (CAP) - Net 6</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.617 MHz 26617 kHz - Civil Air Patrol (CAP) - Net 6</div></td></tr> </table>

R4002 https://hfunderground.com/wiki/index.php?title=11_meter&diff=18738&oldid=prev 2026-09-11T13:27:34Z

<p><span class="autocomment">Legal Users of the 25-30 MHz Spectrum - Frequencies To Avoid</span></p> <table style="background-color: white; color:black;"> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 13:27, 11 September 2026</td> </tr><tr><td colspan="2" class="diff-lineno">Line 200:</td> <td colspan="2" class="diff-lineno">Line 200:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Many of these frequencies are only technically allocated, but are rarely used due to the heavy CB radio and out of band or freeband CB radio traffic on/near them.&nbsp; &nbsp;</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Many of these frequencies are only technically allocated, but are rarely used due to the heavy CB radio and out of band or freeband CB radio traffic on/near them.&nbsp; &nbsp;</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del class="diffchange diffchange-inline">*Pretty much everything below 25.6 MHz or so</del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>&#160;</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td colspan="2" class="diff-lineno">Line 211:</td> <td colspan="2" class="diff-lineno">Line 211:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.145 MHz 26145 kHz - HF SSB Marine Channel 2501</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.145 MHz 26145 kHz - HF SSB Marine Channel 2501</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.148 MHz 26148 kHz - HF SSB Marine Channel 2502 - Coast Stations: &nbsp;</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.148 MHz 26148 kHz - HF SSB Marine Channel 2502 - Coast Stations: &nbsp;</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>*26.151 MHz 26151 kHz <del class="diffchange diffchange-inline"> </del>- HF SSB Marine Channel 2503 - Coast Stations: &nbsp;</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>*26.151 MHz 26151 kHz - HF SSB Marine Channel 2503 - Coast Stations: &nbsp;</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>*26.154 MHz 26154 kHz <del class="diffchange diffchange-inline">26.154 MHz </del>- HF SSB Marine Channel 2504 - Coast Stations: &nbsp;</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>*26.154 MHz 26154 kHz - HF SSB Marine Channel 2504 - Coast Stations: &nbsp;</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.157 MHz 26157 kHz - HF SSB Marine Channel 2505 - Coast Stations:&nbsp; - Ship Stations: 25082 kHz 25.082 MHz</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.157 MHz 26157 kHz - HF SSB Marine Channel 2505 - Coast Stations:&nbsp; - Ship Stations: 25082 kHz 25.082 MHz</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>*26.160 MHz 26160 kHz <del class="diffchange diffchange-inline">26.160 MHz </del>- HF SSB Marine Channel 2506 - Coast Stations: 26160 kHz 26.160 MHz - Ship Stations: 25085 kHz 25.085 MHz</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>*26.160 MHz 26160 kHz - HF SSB Marine Channel 2506 - Coast Stations: 26160 kHz 26.160 MHz - Ship Stations: 25085 kHz 25.085 MHz</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>*26.163 MHz 26163 kHz <del class="diffchange diffchange-inline">26.163 MHz </del>- HF SSB Marine Channel 2507 - Coast Stations: 26163 kHz 26.163 MHz - Ship Stations: 25088 kHz 25.088 MHz</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>*26.163 MHz 26163 kHz - HF SSB Marine Channel 2507 - Coast Stations: 26163 kHz 26.163 MHz - Ship Stations: 25088 kHz 25.088 MHz</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>*26.166 MHz 26166 kHz <del class="diffchange diffchange-inline">2</del>- HF SSB Marine Channel 2508 - Coast Stations: 26166 kHz 26.166 MHz - Ship Stations: 25091 kHz 25.091 MHz</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>*26.166 MHz 26166 kHz - HF SSB Marine Channel 2508 - Coast Stations: 26166 kHz 26.166 MHz - Ship Stations: 25091 kHz 25.091 MHz</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>*26.169 MHz 26169 kHz <del class="diffchange diffchange-inline">26.169 MHz </del>- HF SSB Marine Channel 2509 - Coast Stations:&nbsp; - Ship Stations: 25094 kHz 25.094 MHz</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>*26.169 MHz 26169 kHz - HF SSB Marine Channel 2509 - Coast Stations:&nbsp; - Ship Stations: 25094 kHz 25.094 MHz</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>*26.172 MHz 26172 kHz Channel 2510 - Coast Stations:&nbsp; - Ship Stations: 25097 kHz 25.097 MHz</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>*26.172 MHz 26172 kHz <ins class="diffchange diffchange-inline">- HF SSB Marine </ins>Channel 2510 - Coast Stations:&nbsp; - Ship Stations: 25097 kHz 25.097 MHz</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.575 MHz 26575 kHz - Military use - [[Emission_Designator|emissions]] 6K00B9W and 9K00B9W only</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.575 MHz 26575 kHz - Military use - [[Emission_Designator|emissions]] 6K00B9W and 9K00B9W only</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.617 MHz 26617 kHz - Civil Air Patrol (CAP) - Net 6</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.617 MHz 26617 kHz - Civil Air Patrol (CAP) - Net 6</div></td></tr> </table>

R4002 https://hfunderground.com/wiki/index.php?title=11_meter&diff=18737&oldid=prev 2026-09-11T13:26:47Z

<p><span class="autocomment">Legal Users of the 25-30 MHz Spectrum - Frequencies To Avoid</span></p> <table style="background-color: white; color:black;"> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 13:26, 11 September 2026</td> </tr><tr><td colspan="2" class="diff-lineno">Line 210:</td> <td colspan="2" class="diff-lineno">Line 210:</td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.100 MHz 26100 kHz - 26100.5 kHz - Marine Safety Information - HF marine allocation &nbsp;</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.100 MHz 26100 kHz - 26100.5 kHz - Marine Safety Information - HF marine allocation &nbsp;</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.145 MHz 26145 kHz - HF SSB Marine Channel 2501</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.145 MHz 26145 kHz - HF SSB Marine Channel 2501</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>*<del class="diffchange diffchange-inline">26148 kHz </del>26.148 MHz - HF SSB Marine Channel 2502 - Coast Stations: &nbsp;</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>*26.148 MHz <ins class="diffchange diffchange-inline">26148 kHz </ins>- HF SSB Marine Channel 2502 - Coast Stations: &nbsp;</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>*<del class="diffchange diffchange-inline">26151 kHz </del>26.151 MHz - HF SSB Marine Channel 2503 - Coast Stations: &nbsp;</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>*26.151 MHz <ins class="diffchange diffchange-inline">26151 kHz&nbsp; </ins>- HF SSB Marine Channel 2503 - Coast Stations: &nbsp;</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>*26154 kHz 26.154 MHz - HF SSB Marine Channel 2504 - Coast Stations: &nbsp;</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>*<ins class="diffchange diffchange-inline">26.154 MHz </ins>26154 kHz 26.154 MHz - HF SSB Marine Channel 2504 - Coast Stations: &nbsp;</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>*<del class="diffchange diffchange-inline">26157 kHz </del>26.157 MHz - HF SSB Marine Channel 2505 - Coast Stations:&nbsp; - Ship Stations: 25082 kHz 25.082 MHz</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>*26.157 MHz <ins class="diffchange diffchange-inline">26157 kHz </ins>- HF SSB Marine Channel 2505 - Coast Stations:&nbsp; - Ship Stations: 25082 kHz 25.082 MHz</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>*26160 kHz 26.160 MHz - HF SSB Marine Channel 2506 - Coast Stations: 26160 kHz 26.160 MHz - Ship Stations: 25085 kHz 25.085 MHz</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>*<ins class="diffchange diffchange-inline">26.160 MHz </ins>26160 kHz 26.160 MHz - HF SSB Marine Channel 2506 - Coast Stations: 26160 kHz 26.160 MHz - Ship Stations: 25085 kHz 25.085 MHz</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>*26163 kHz 26.163 MHz - HF SSB Marine Channel 2507 - Coast Stations: 26163 kHz 26.163 MHz - Ship Stations: 25088 kHz 25.088 MHz</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>*<ins class="diffchange diffchange-inline">26.163 MHz </ins>26163 kHz 26.163 MHz - HF SSB Marine Channel 2507 - Coast Stations: 26163 kHz 26.163 MHz - Ship Stations: 25088 kHz 25.088 MHz</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>*<del class="diffchange diffchange-inline">26166 kHz </del>26.166 MHz - HF SSB Marine Channel 2508 - Coast Stations: 26166 kHz 26.166 MHz - Ship Stations: 25091 kHz 25.091 MHz</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>*26.166 MHz <ins class="diffchange diffchange-inline">26166 kHz 2</ins>- HF SSB Marine Channel 2508 - Coast Stations: 26166 kHz 26.166 MHz - Ship Stations: 25091 kHz 25.091 MHz</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>*26169 kHz 26.169 MHz - HF SSB Marine Channel 2509 - Coast Stations:&nbsp; - Ship Stations: 25094 kHz 25.094 MHz</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>*<ins class="diffchange diffchange-inline">26.169 MHz </ins>26169 kHz 26.169 MHz - HF SSB Marine Channel 2509 - Coast Stations:&nbsp; - Ship Stations: 25094 kHz 25.094 MHz</div></td></tr> <tr><td class='diff-marker'>-</td><td style="background: #ffa; color:black; font-size: smaller;"><div>*<del class="diffchange diffchange-inline">26172 kHz </del>26.172 MHz Channel 2510 - Coast Stations:&nbsp; - Ship Stations: 25097 kHz 25.097 MHz</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>*26.172 MHz <ins class="diffchange diffchange-inline">26172 kHz </ins>Channel 2510 - Coast Stations:&nbsp; - Ship Stations: 25097 kHz 25.097 MHz</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.575 MHz 26575 kHz - Military use - [[Emission_Designator|emissions]] 6K00B9W and 9K00B9W only</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.575 MHz 26575 kHz - Military use - [[Emission_Designator|emissions]] 6K00B9W and 9K00B9W only</div></td></tr> <tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.617 MHz 26617 kHz - Civil Air Patrol (CAP) - Net 6</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>*26.617 MHz 26617 kHz - Civil Air Patrol (CAP) - Net 6</div></td></tr> </table>

R4002