Had a one off crystal made by QuartSlab...Bit expensive but worth it I reckon..
The crystal frequency is 14.097100 HC49U 30pF parallel..
With C5 removed, I can tune below/through and above the WSPR portion of the 20 meter band.
Running a simple one transistor (2N3866) external PA fed from the "C OUT" connector on the kit PCB.(internal PA turned off).
This PA is running from 12 Volts and at this frequency, I get almost 500mW out (PA runs 900mW on 40 meters).
Using the external PA keeps any heat away from the kit oscillator and reduces drift by a significant amount...
Crystal and capacitors around the osc circuit are all plugged in on this kit so I can experiment with different values/bands without risking damage to the PCB..
My LPF is external as well and selected to match the band I want to use...
Anyhoo, first run this evening into my new 132' Windom shows a good selection of spots...
Over 10 from the states, one VK, one from Uruguay, two from Brazil and goodly collection from Europe...
Great fun
Philip G4JVF
