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Re: [Amps] help diagnosing a bad 8450a probe ?

To: Dan Sawyer <>
Subject: Re: [Amps] help diagnosing a bad 8450a probe ?
From: Steve Thompson <>
Date: Fri, 09 Dec 2005 17:09:53 +0000
List-post: <>

Dan Sawyer wrote:
> Steve,
> I have a cross match for HP2800 and HP2835 to NTE parts 112 and 484, 
> they are available locally. What characteristics should I look for? In 
> this circuit as long as they  match will they work in this circuit?
I think any small shottky diode will work in the circuit. Without 
studying the manual, I'm not sure which characteristics matter most, but 
at I doubt there's any need for precision matching, if you buy 4pcs in 
one go, the likelyhood is they will come from the same batch and be 
close enough. A while ago I repaired a damaged probe which had one blown 
diode - I only had one to hand so I used it and the probe worked ok. 
Later I put in a set of four the same, but didn't notice any difference.

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