Yaesu: FT 100. No power out.
- Thread starter k4do
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There was definitely a ALC Circuit issue that caused that problem, but I seem to remember it being everywhere, not just 2 of the bands.
It is everywhere. I’m hoping somebody has experience to say that it’s just a chip.
devicelab
Whacker Extraordinaire
Do a complete reset on the radio. Instructions are in the manual.
Using a 100w dummy load (HF) transmit on 14.200 USB at 25w, 50w and 100w power levels.
Using a 50w dummy load (VHF/UHF) transmit on VHF and UHF ham frequencies at low, mid and high levels.
If you get no power output then the MOSFETs are likely blown. It'd be a little odd if the HF and VHF/UHF MOSFETs are blown together. Usually that signifies major static (lightning damage) coming through the transmission lines and into the transceiver.
Service manual here: http://www.radiomanual.info/schemi/YAESU_HF/FT-100_D_serv.pdf
Using a 100w dummy load (HF) transmit on 14.200 USB at 25w, 50w and 100w power levels.
Using a 50w dummy load (VHF/UHF) transmit on VHF and UHF ham frequencies at low, mid and high levels.
If you get no power output then the MOSFETs are likely blown. It'd be a little odd if the HF and VHF/UHF MOSFETs are blown together. Usually that signifies major static (lightning damage) coming through the transmission lines and into the transceiver.
Service manual here: http://www.radiomanual.info/schemi/YAESU_HF/FT-100_D_serv.pdf
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