Chris, You can reduce the AF voltage at the input of the zero beat indicator with a simple series resistor between the AF Gain pick-off point and the indicator. Size it so your ambient noise does not make it blink with full RF Gain, so you may have to experiment a bit to get it where you want it. I used 100k and it worked fine for me.
You could also use a voltage divider to reduce the amount of audio reaching the detector. IMHO, reducing the RF gain to achieve a lack of "false indications" is not the right way to attack the problem. If you force the AGC to reduce the gain in this case, you will also reduce the dynamic range of the K2 - not a good way to achieve your goal. 73, Don W3FPR On 6/30/2011 11:14 AM, Christopher Kimball wrote: > I've installed the K6XX zero beat indicator on my K2. It's a real > improvement, for me, over the "Spot" button action. Alas, it blinks > distractingly on the no-signal condition with the RF gain at max. > (Reducing the RF gain, fixes this, but I'd rather let the AGC do the > gain control.) > > Is there some point at which I can get a signal from the K2 that > indicates the "Spot" function is active, so I can activate the K6XX? > It'd be nice to eliminate the spot signal, too. > > Clearly, I don't understand where the spot signal comes from. > > Chris Kimball > WB4WZR > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
