[Collins] 32 s 1 self oscilation

[Jim]

With the same format as the Collins manuals, I use Excel spreadsheets to 
record voltage and resistance measurements.

Beside the advantage of having a good "base" measurement, Excel features can 
be used to compare measurements from one bench session to the next.

Jim



> I believe the maintenance of voltage and resistance charts WAS consistent, 
> at least through the S-line era. It was poor. I have found a number of 
> anomalies in 32S-3 charts. For example, the plate voltages shown for 32S-3 
> V4, V5, and V6 simply don't make sense. The Voltage chart calls for 250 
> VDC. Measured voltages are in the range of 215 to 220 VDC (depending on 
> power supply variation). If you look at the operating conditions of these 
> tubes and bounce that against the voltage drop that should be seen across 
> the parallel combination of R29 and R30, you should, and indeed, do see 
> voltage drops in the range of 50 to 60 VDC, NOT 25 VDC.
>
> I have the same confidence level in the AC (RF) voltages shown in charts, 
> A number of years ago I measured RF voltage levels from the 1st mixer 
> grids up to the PA tube grids in TUNE and LOCK KEY modes with a scope and 
> a 410B. All I have to do is find those old notes...
>
> 73, Bob, KF6BC