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Re: Bitx AGC circuit

 

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Willy,
Long time. Guess who I just Worked! W1LY 2A RI on 20m cw as K8GC my clubs call. Nice to hear ya on the band's.
73
Enjoy FD
David
?? N8DAH
From: [email protected] <[email protected]> on behalf of Willy <W1LY@...>
Sent: Tuesday, November 7, 2017 7:03:28 PM
To: [email protected]
Subject: Re: [BITX20] Bitx AGC circuit
?
I am using this circuit without the 10K between the diode and the 2N7000 which was not in Farhan's original schematic.
It works fairly well for me.
I have seen a number versions which have not worked. One has the 10 K at "audio in" replaced with a 100K and the 100 R at the anode of the 1N4148 shown as 100K
73 Willy? W1LY

On Tue, Nov 7, 2017 at 2:31 PM, Philip Thompson <pcteee@...> wrote:

Thanks guys...all understood..

It's just that I built one for my Bitx and it doesn't seem to work.
The voltage on the gate of the fet is going up and down in response to the audio level
but there seems to be little or no attenuation to the stronger signals....
Double checked and I made no mistakes..
Phil? G4JVF



--
David

?N8DAH
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