[sdiy] CA3080 VCF and Mysterious Op Amp Behaviour

[Gavin Russom]

resistances measure the same on all op amp pins to GND for both working and
non-working boards, but this was a very informative experiment!
----------
>From: Paul Perry <pfperry at melbpc.org.au>
>To: "Gavin Russom" <elmystico at earthlink.net>
>Subject: Re: [sdiy] CA3080 VCF and Mysterious Op Amp Behaviour
>Date: Sat, Dec 8, 2001, 6:51 PM
>

>It's a long shot, but if they are in sockets, is one pin not actually 
>touching the socket? (I've seen this happen!)
>
>Otherwise, seeing you have 2 of them, with the power off, 
>measure the resistance from each pin of the suspect op amps to ground.
>If you find a big difference somewhere, then you have a hint that 
>'something' is different.
>(this is part of the automatic test procedure for commercial boards..
>mind you, they have a $200,000 plus automated machine doing this!)
>
>paul perry melb australia
>