Re: "Hot" K3

Posted by Ignacy on Mar 16, 2009; 2:15pm
URL: http://elecraft.85.s1.nabble.com/Hot-K3-tp2483931p2486290.html

Did you experiment with AGC threshold? It may be very low in your case. Then K3 has high amplification even for very weak signals.
Ignacy

Don Rasmussen wrote

Guys,

My new K3 #2308 shows two to three S-units high as compared to my other HF radios, and lots of hiss in the speaker audio at low AF levels. It acts as if I had maxed out the value for the crystal filter gain in the firmware, or had the PreAmp on. I have made sure the gain is at zero and moved the crystal filters (12.5 and 2.7) into different spots, but still too hot.

I can make it more normal with respect to AF gain and S-meter if I turn the ATTenuator on. I have the 2.7 filter installed and have not added any gain in the FL1 filter definition. I did a master reset and also loaded old versions of the firmware but no improvement was noted.

I have emailed my request to [e-mail], but want to post this to the list - anyone seen their K3 with these symptoms?

Thanks,
Don Rasmussen
Carlsbad, Ca.
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[e-mail]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html