KB9NK 10 Meter Beacon

Power Supply Modifications

View of beacon radio assembled into the case.  The power supply is mounted to the bottom of the case with 6-32 screws through rubber stand off feet to reduce the cooling fan noise of the power supply.  The radio is mounted to the power supply with 3M Dual Lock.  Available from Radio Shack in clear backing as p/n 64-2363 and black backing as p/n 64-2360.  The black is listed as Hi-Temp / Hi-strength (great stuff!).

The case fan in the rear is a 3" 12vdc computer fan with a chrome guard on the rear of the case to keep fingers and little critters out of the fan.  The fan has fiber washers between the fan and the case to reduce noise in the case fan operation. 
NOTE: All of the cooling fans operate continuously.  Something I have to work on is a temperature control for the fans.



Operating a Beacon
Before operating any beacon transmitter on amateur radio frequencies, consult the current FCC regulations, part 97.203, governing beacon stations.  A portion of the regulation is provided below as an example of the information provided.

97.203 Beacon Stations
(a) Any amateur station licensed to a holder of a Technician, Technician Plus, General, Advanced or Amateur Extra Class operator license may be a beacon.  A holder of a Technician, Technician Plus, General, Advanced or Amateur Extra Class operator license may be the control operator of a beacon, subject to the privileges of the class of operator license held.

(b) A beacon must not concurrently transmit on more than 1 channel in the same amateur service frequency band, from the same station location.

(c) The transmitter power of a beacon must not exceed 100 W.

(d) A beacon may be automatically controlled while it is transmitting on the 28.20-28.30 MHz, 50.06-50.08 MHz, 144.275-144.300 MHz, 222.05-222.06 MHz, or 432.300-432.400 MHz segments, or on the 33 cm and shorter wavelength bands.

(e) Before establishing an automatically controlled beacon in the National Radio Quiet Zone or before changing the transmitting frequency, transmitter power, antenna height or directivity, the station licensee must give written notification thereof to the Interference Office, National Radio Astronomy Observatory, P.O. Box 2, Green Bank, WV 24944.