Common and Precious
From HF Underground
Beacon "Common and Precious"
The Operator [TM] will create a small documentation here. If time is at hand.
Operating since: Friday, 8. of February 2015
Power: 5W (was 1,5W until middle of March)
Antenna: 1/2λ Dipole on a roof, approx 13m above the ground (4,5m above the roof)
System: Pulled 10.240Mhz X-Tal. Uses a 3 stage amplifer: Oscillator, Puffer/Preamp (Keyed) and main PA.
Uses two 7 pole (double PI) filter for harmonics supression (a filter before and after the main PA).
System effiency is approx 68%
Record: 6.605,68km Harrisburg, Pa, USA