[Elecraft] Re: AGC adjustment

[George, W5YR]

Consider the possibilities of varying both the AGC threshold and absolute
level with R1 and R5 variable.

73/72, George
Amateur Radio W5YR -  the Yellow Rose of Texas
Fairview, TX 30 mi NE of Dallas in Collin county EM13QE
"In the 57th year and it just keeps getting better!"
<mailto:w5yr@att.net>





----- Original Message -----
From: <k6se@juno.com>
To: <ei6iz@newsguy.com>
Cc: <elecraft@mailman.qth.net>
Sent: Wednesday, April 30, 2003 9:36 AM
Subject: Re: [Elecraft] Re: AGC adjustment


> Brendan, EI6IZ wrote:
>
> "Once I finished fiddling I re-calibrated the S-meter using CAL S LO and
> CAL S HI. using these settings I can make the S-meter behave pretty much
> any way I want so I don't really understand your problem with the
> S-meter."
> ==========
> Comments by others make it seem that I'm concerned about my S-meter.  Not
> so.  With R1 at 33k, the S-meter is red hot, but that's neither here nor
> there.
>
> My concern is about the possibility of the AGC voltage to the I.F. stage
> being too high on weak signals.  Wayne said this voltage (AGC output at
> U2-1) should be about 3.5 to 3.7 volts for max gain with no antenna and
> AGC on (and RF gain full up).  I'll measure it later today (along with
> noting its value when I turn the AGC off).
>
> 73, de Earl, K6SE
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