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Re: [Amps] Need for bias switch (CW/SSB)

To: <amps@contesting.com>, "RCM" <robrk@nidhog.net>
Subject: Re: [Amps] Need for bias switch (CW/SSB)
From: "Carl" <km1h@jeremy.qozzy.com>
Date: Sun, 17 Jan 2016 13:27:26 -0500
List-post: <amps@contesting.com">mailto:amps@contesting.com>
-100V isnt even close to a full cutoff description since typical operating bias in Class C is -90V for 250B's.

Carl
KM1H


----- Original Message ----- From: "RCM" <robrk@nidhog.net>
To: <amps@contesting.com>
Cc: "Charlie" <charlie@drhabekost.com>
Sent: Sunday, January 17, 2016 11:26 AM
Subject: Re: [Amps] Need for bias switch (CW/SSB)


Back then, you keyed the cutoff bias of the amp.

My Central Electronics 20A had -100 vdc out the back that followed the keying and did a full cutoff
of the HB 4X250's with operating bias set for class C.

No clicks....

On 01/13/2016 03:41 PM, Kim Elmore wrote:
I don't think this is true. Class C will generate terrible key clicks because it won't preserve the keying envelope.

Kim N5OP

"People that make music together cannot be enemies, at least as long as the music lasts." -- Paul Hindemith

On Jan 12, 2016, at 09:24, Mike Feher <n4fs@eozinc.com> wrote:

In CW it can run Class C, but for SSB it has to be linear. 73 - Mike



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