I am trying to repair the probe on this HP Voltmeter. The diodes in the diode bridge part of the circuit are blown. There is no mention in the manual of what they are. They measure 0.3 volts in one direction and high in the other. I assumed they were probably germaniuns.
The numbers on the originals were
HP
as you view around the barrel.
I substituted some 5082-2804 matched pair schotkys but the sensitivity wasn't very good. What were the originals? Any ideas?
Andrew
Andrew Tweddle schrieb:
Hello Andrew,
that's weird, i have used 5082-2805 Matched Quads to repair the 3406 and the nearly identical sampling heads of the 8505 Vector Voltmeter with success. Maybe there is more blown than the diodes? Or the two pairs you are unsing are too different and the Bridge Balance is too far away?
Jorgen dj0ud
for direct reply please remove all eight x from the adress.
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