Speaking of a 106, anyone know anything about the GaAs diodes in the Fast Rise outputs? I think one or two of mine are bad. The +OUTPUT works but not the -OUTPUT. Input to the two diodes on the -OUTPUT side looks okay but at the junction between the two, the signal is not correct and the output is not correct at all.
I've never seen diodes constructed like these before and don't expect I'll find direct replacements but am wondering could be used as replacements.
Thanks,
Barry - N4BUQ
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----- Original Message -----
From: "saipan59 (Pete)" <saipan1959@...>
To: "tekscopes" <[email protected]>
Sent: Friday, December 17, 2021 4:24:27 PM
Subject: Re: [TekScopes] Type 106
Ah, so your earlier "my bad" message meant to say that nothing is actually wrong
with the +/-10 rails. Got it.
However, regarding:
"Instead of checking voltages between chassis ground and directly at both
emitters, I probed between ground and + C215/ C218. According to the
schematic, this should be the same. But apparently not"
You MUST get the same values at the Emitters and at +C215 and -C218 ! If you
don't, you've got a measurement problem, OR those caps are not actually
connected like they should be.
Note that those rails *may* appear to work fine, even if C215 and C218 are
missing...
Pete
