Andrew,
I set each band to FM and measured the power supply current at each band.? I found that 160M measured 5 amps and 6M measured 20 amps.? The current increased from 160M to 6M in a linear fashion.? The external RF power meter never shows more than a few milliwatts at any of the bands.
Where should I measure the signal along the hf filter path?
Thank you so much.
Measure the current from the power supply, if 18-20 odd amps then the power is being generated, but being lost in the RF LPF or certainly ?in that path, if current only 2-3 amps, then the HF pa transistors are not been driven!
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KR
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Andrew
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I purchased an IC7000 with the condition that will not transmit on all HF bands.? VHF/UHF transmit at the designed power out in all modes.? Receiver works excellent in all bands all modes.? Since VHF/UHF transmit proves that the Driver circuit works I have focused on the HF circuit.? With a scope, I see hf signal through the driver and through the power transistors Q301 and Q302.? The bias current is set properly.? All board traces seem to be in-tack and pass the signal through to the ANT1 connector when terminated with a dummy load, but the signal barely registers on the external power meter when the power control is set to 100%.
Any help for further troubleshooting will be greatly appreciated.
