I'm getting close to doING the same on my SX-100. So I'm interested in knowing your outcome.
What is the peak to peak measurement of your input signal and is it 50 ohm terminated? And, what about your probes (10:1 or not)?
-Drew
On Mon, Apr 1, 2024 at 5:25 PM, Keith
<kd4avp@...> wrote:
Apparently I only thought my alignment was successful.
Think I either interpreted something wrong or there is something more going on.?
Inputting a 50.5kc signal at T1 on pin number 1 as directed in the manual.?
I am using a Heathkit IG 5282 signal generator adjusted as close to 50.5kc I can get.
Used my oscilloscope to get that on target.?
Pulled the 1 osc conversion tube as recommended.?
Using my VTVM connected at point B (R48, R49 & C81 all connect on a terminal strip at this point), was monitoring the DC voltage.
I was adjusting T3, T4, T5 & T6 (all 50.5 IFs) to maintain 1 volt reading on the VTVM.
I never got anywhere close to 1 volt DC.
It was actually closer to 10 and 12 vdc.
What am I missing here?
I did manage to get it down to 7 volts but it was not completely stable there. But I did expect it to vary a little bit.
In my mind, I must have been thinking it should only vary by 1 volt....not actually be 1 volt.
Leaning on you guys with a better understanding of what I may be seeing here.?
Thanks!
Keith
KN6WFM (Drew)