In article , Dave Plowman (News)
scribeth thus
In article ,
Trevor Wilson wrote:
Snag is this squawk happens immediately at switch off. So the relay
would have to operate extremely quickly.

**Phil's idea is a good one. I used exactly that solution a short time
back with a Sony integrated amp. The preamp section was going unstable
at switch-off. The job was rapidly becoming unviable, so, after
consultation with the client, he agreed that a fast operating relay
would be acceptable. I used it to short the output of the preamp to
earth at switch-off. Perfect solution. Not ideal, but it does work well.

But not really an answer to my question, thanks.

It's an fairly obvious 'cure' although might well not be perfect in
practice.



Seems that this is in the BBC designed bit of the amp?.

Have you got the circuit for that particular variant unit Dave;?..

Phil's idea is a good one but in this instance there is another fault
thats causing a problem that shouldn't be there.

Makes me wonder if thats having an effect on the signal path?

Got a sack of mini relays made by Pickering used by Neve and Audix if
you want a few, only problem is there're 24 volt ones....

--
Tony Sayer