Check is Q15 is working along with relay Q1. You should be able
to feel K1 clicking when you press PTT.
Since you are getting 0V on RX as well as TX they could be a
break in the PCB track.
Raj
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Hi All,
I've checked voltages on the board, in most instances during tx
and rx, against the uBitxV4 data sheet (I couldn't find q71 to q73
- perhaps not on v6 board)
Most things were pretty close eg Q90 TX was 10.79 3.43 2.71,
against the V4 figures of 11.55 3.66 3.04
Q911/912 11.05 0.90 0.32 against 11.8 1.07 0.49
However, when I measured Q10, Q20, Q30,Q40 readings were all over
the place. Q10, Q11, Q12 TX voltages on Collector were all 0v,
against v4 readings of 7.47v, 11.58v. 11.58v respectively.
Q20, 21, 22 RX voltages C B and E were all 0v
Q30, 31, 32 TX voltages C B and E were all 0v
Q40, 41, 42 RX voltages C B and E were all 0v
Not wishing to waste anyone's time, am I reading the data sheet
correctly?
Thanks as ever,
Nick
_._,_
Raj vu2zap