Initial Power-up Test of the Collins KWS-1 transmitter with PA Stage Operating

I coupled the replacement blower to the KWS-1 transmitter and checked operation of the PA stage. This video provides a brief demo of the KWS-1 operating on SSB,. AM and CW on the 20M ham band into a dummy load. The maximum power output was around 450W, which is likely due to the PA tubes operating with a reduced plate voltage (1600vDC/1500vDC under load) instead of the full plate voltage of 2000vDC under load - this is due to a former owner using the 1500vAC taps on the HV transformer instead of the 2000vAC taps (I left it as-is for this initial test).

[@zdzisiek1979]

👍 dobra praca

[@RadioRestoration]

Thanks!