OK, I did it for several modes and there are differences which I will leave for now. Aimed for 3.65 volts at U2 now. Result seems satisfactory to the ear.
Today in the evening we will use a signal generator and a variable attenuator to test sensitivities of my K2 and this other one. If results should not be ok I'll let you now. Thanks so far for all the help! Gerhard ----- Original Message ----- From: "Don Wilhelm" <[EMAIL PROTECTED]> To: "Gerhard Schwanz" <[EMAIL PROTECTED]>; <[email protected]> Cc: <[EMAIL PROTECTED]> Sent: Friday, November 11, 2005 12:37 PM Subject: RE: K2 receiver problem - AGC alignment, CAL S LO/HI > Gerhardt, > > If you still have a difference between AGC on and off at 3.65 volts or > lower, I would hesitate to go further, but you certainly can try it and see > what happens - no real harm will come from a lower threshold voltage. > > After setting the threshold, then adjust CAL S LO first and then CAL S HI > (the order is important, they interact). It is not unusual to have to do > these several times in succession to get it correct. The low S meter > response may vary with the filter width and mode, so check all modes with > the widest filter for each mode. > > 73, > Don W3FPR > > > -----Original Message----- > > > > Hi list, > > hi all those who answered my first question. > > > > I had 4V at Pin5 U2. So I replaced R1 with a pot of 50k and set > > it to 3.65, > > 3.72 and 3.8V. It got better for sure. The difference between AGC > > on and off > > is in all cases noticable, but slightly. But I think it's significant, > > because... > > > > When I CAL S LO and exit it then immediately 1-2 bars of the s-meter start > > lighting. So I guess AGC sets in. And this should not be the > > case, I guess? > > Any idea? > > > > Have a nice day, > > > > Gerhard > > > > > ___________________________________________________________ Gesendet von Yahoo! Mail - Jetzt mit 1GB Speicher kostenlos - Hier anmelden: http://mail.yahoo.de _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
