160m amplifier with sweep tubes
Few years ago 9A6C purchased CB amplifier with 5 PL519 sweep tubes inside. Amp was , very generous, declared as 1kw amplifier. One tube was in pre-driver stage and others was in final stage.
Due to lack of amplifiers with 160m band decision was to rearrange this monster into decent ham amplifier.
Result is amp from ancient days but I really enjoyed in this project. Its delivers up to 600W with 50% efficiency
and good mains.
C1 - 2nF silver mica
C2 - 2nF silver mica
C3 - 5kV, 500pF
C4 - blocking, 2kV, 5nF,
Cp - plate variable condenser 500 pF
CL - load variable condenser 500pF with 600pF silver mica added in parallel (not shown on shematic)
Rc - current equalizing resistors 10 ohms 2W
RFC - wounded on toroidal core founded in some switching device, 0.7 mm wire, wounded to fit
REL1 - 12V
L1 - 40 wounds, 1.6 mm insulated wire, 5cm dia, tap at 12 turns
L2 - 11 wounds, 1.6 mm wire, wounded over L1