[Amps] parasitic oscillation techniques

[Alex Eban]

My guess is that the guy meant it as a figure of speech, not literally!
Let's not start another flame war!
The problem with oscillation is that there are so many variables that it's
practically impossible to take them all into account! You can charge it to
any one of them!
That is the reason that companies like Collins and Magnavox used to include
negative feedback in linear amplifiers. Apart from improving the linearity,
they include a form of high pass section whose role is to drastically reduce
the amplification at the higher frequencies. It worked like a charm! The
point is that with all this, and with the amplifier built in a VERY
consistent manner, we still had from time to time one running off. Same
circuit- well tested- same tubes, same circuit and we still had music coming
out. Usually we had only to reroute wiring slightly and we tamed them, but
the point was that it did happen, even after 9000 units!
So don't be too hard on him, please.
Alex	4Z5KS

-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
Behalf Of Bill, W6WRT
Sent: Monday, August 24, 2009 3:13 AM
To: Carl
Cc: amps at contesting.com
Subject: Re: [Amps] parasitic oscillation techniques

ORIGINAL MESSAGE:

On Sun, 23 Aug 2009 13:08:06 -0400, "Carl" <km1h at jeremy.mv.com> wrote:

>The comment I most remember from the Eimac engineer is that 
>Measures was responsible for more destoyed 8877's than all other sources 
>combined since the tube came out.

REPLY:

That is quite a remarkable statement. Before you besmirch Rich's reputation
any
further, can you back up your statement with names, dates and facts?

73, Bill W6WRT
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