Re: PIC Question (UPDATE)
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I tested both diodes with my multimeter.? The forward voltage drop was .29 volts with them in the circuit.? I have good continuity between the input and T2.? Continuity through T2 as well.? Still no voltage at TP! with 10 watts RF at the input.
Can't hear any signals with the tuner in line with the antenna but I can trace a signal through it with y oscilloscope.?
Getting confused now.
Bill
On Saturday, November 9, 2024 at 01:05:28 PM CST, Immo, DL5KB <dl5kb@...> wrote:
Bill, you wrote: Looks like the PIC may be bad.? It's not initiating tuning when RF is applied.
If there is no voltage at the reverse diode D1, then SWR = 1!! What to tune? tuning takes place only with SWR>1.3! If there is no voltage at the forward diode D2 nothing is to tune¡ There mus be voltages at both diodes if RF is applied!
73,Immo
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