Re: OPT equalising circuit

"Phil Allison" <philallison@[EMAIL PROTECTED]
> wrote in message 
news:681onaF2qvh31U1@[EMAIL PROTECTED]
>
Patrick T wrote:

>> I don't know how many tube amps you have designed and or built or
>> repaired count. Many tube amps will oscillate at HF when connected
>> to a capacitor load.
>
>
> ** Only a psychotic lunatic would deliberately connect a capacitor
across 
> the output of a tube audio amp.

Quite wrong Phil. 0.22µF is a standard (albeit tough) test
for tube amp stability.  You will find it mentioned in articles
by Tremaine and Crowhurst.

>> In order to gain unconditional stability ....
>
>
> ** An unnecessary,  pedantic,  pseudo technical wank.

Unconditional stability is more im****tant now that is was
in the hey-day of tube amps when many speakers were 15
Ohms, and formed benevolent loads.

Unconditional stability is a "must"

Iain