On 4/16/2023 12:36 AM, Carl wrote:
Richard thanks.?
No I don’t have any test equipment other than other radios
receivers, DMM (not much use here) etc. I used a nanovna as a
signal generator for the other bands alignment and that went
well, I was able to peak the signal from that. I understand not
having the correct test equipment isn’t ideal, but the way I’ve
aligned it so far has improved the other bands sensitivity.
Would building an rf probe for my DMM be useful?
Yes, by all means and there are plenty of YouTube videos on how to
do that.? You can also use the probe with an analog voltmeter if
that's all you have.? The manual wants you to shoot for 300mv
injection at the test point on the RF board for each band when you
adjust the oscillator trimmers.? I have noticed that the receiver
sensitivity doesn't seem to drop off until the injection drops below
200mv.? At least with the extra receiver, you can determine that
each xtal is operating at its design frequency and detect a dead
one.? Mine has been on the bench for weeks and I work on it as time
permits, loving the learning experience!
Richard
Thanks.?
