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From: "Don Brown" <DolfinDon at msn.com>
To: "Leonard, David" <david.leonard at spcorp.com>,
        <elecraft at mailman.qth.net>
Subject: Re: [Elecraft] K2 - Setting AGC Threshold Voltage
Date: Fri, 28 Feb 2003 10:24:19 -0600

Hi

This problem seems to come up from time to time. The AGC threshold voltage
is determined by the voltage divider made up of RP6 and R1. If the +8 volt
regulator is a little on the low side of its tolerance then you will not be
able to reach 3.9 volts. 3.84 is probably close enough, but if you want to
set it to 3.9 then bridge a resistor (51K-100K) across RP6 pins 3 and 4.
Then adjust R1 for 3.9 volts

Don Brown
KD5NDB


----- Original Message -----
From: "Leonard, David" <david.leonard at spcorp.com>
To: <elecraft at mailman.qth.net>
Sent: Friday, February 28, 2003 9:21 AM
Subject: [Elecraft] K2 - Setting AGC Threshold Voltage


> Hi last night I was going over my RF board Tests before moving on to the
> next step(s).
>
> I was unable to get the proper 3.9 volt reading called for in step 5 on
page
> 46 of the manual.
>
> The maximum  voltage I could get was 3.84 using my external DMM (a Radio
> Shack DMM .. I sure wish I had my Fluke down here 8-(
>
> My Question:
>
> Is this a cause for concern? (I don't think so, but again I want to solve
> problems before I build in more problems for later troubleshooting)
>
> What should the maximum voltage be at that point?
>
> Everything else was correct or "D.O.B.A" (to quote Ms Marisa Tomei 8-)
>
> Tnx DE Dave WB9SOG

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Date: Sat, 1 Mar 2003 11:01:10 +0100 (CET)
From: =?iso-8859-1?q?Rene=20Klimkeit?= <rklimkeit at yahoo.de>
Subject: Re: [Elecraft] K2 - Setting AGC Threshold Voltage
To: elecraft at mailman.qth.net

Hello K2-Friends,

unbelievably: i had the some problem at the same time:
yesterday. My K2 (sn 3254) reaches the max voltage of
3,86V.

Welcome in the Club of low AGC Threshold voltage.

Don Brown, thank you for your help in this case.

tnx de Rene, DF8WA 


> Hello David.
> I had exactly the same problem last night too !
> The maximum voltage I can read is 3.83 V with two
> different DMM. I have
> checked all resistors and all have correct values.
> 73

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