Common and Precious 5

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Beacon "Common and Precious Nr. 5"

Status This is work in progress and scheduled for launch during December 2022. All Common and Precious Beacons are under re-construction or in for a re-location. The 2nd generation beacons will transmit on CW and RTTY alternating. The new message will carry, besides the usual informative standard text, also live temperature and humidity. An AM2303 sensor is used.

This news Beacon, Nr. 5, is the first to run with the new concept. If all works fine, the hardware of all other beacons will be upgraded and updated with the new firmware.

History Backlog

Summary

- Operating since: <none>

- Frequency: 4.09*,***kHz (to be set)

- RF Power: 50W

- Antenna: short Groundplane (with top capacity) and load coil located 8/10 up the antenna. Installed approx 70m above the ground. A wider spread set of radials provide a counterpoise. Total height of the antenna is approx 6m.

- Power Source: 24V/100W Switch Mode Power Supply

- System: pulled 4.096kHz X-Tal. 74Ls02 based oscillator. MOSFET Driver: . FET used:

- Keying: Atmel AVR ATTiny26.

- Uses two 7 pole (triple PI) filter for harmonics supression.

- System effiency: <open>

- Record: none

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