472 kHz VFO
475 Xtal 1W QTX PA 25W QTX PA 100W QTX PA
Notes:
L1: coil lacquered, then hot-glued in place ~4mm above ground-plane & clear of metalwork.
Tune capacitor alternative: 30pF B-hive - see 501-504kHz CMOS VFO & GW4HXO B-Hive VFO
Dielectric info: NPO ceramic. N150 ceramic or polystyrene. C1: 148pF total. N150 range 68-82pF.
Hardware: brass screws/fixings [non-ferrous] used in vicinity of toroid [affected by magnetised materials].
Temperature Test Chamber
15/4/12
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