I have just received a new old K2 here. It has most of the important mods, AtoB upgrade, and is working as well as it can, as best I am able to determine. The alignment is fine, and it puts out OK on all bands. I have not been able to find any posts about the sensitivity on 15m-12m-10m being not so great. On 40m-80m-160m it is what I would expect. 20m it's just OK with wider filters, but there is plenty of internal noise with the narrower filters.
I don't have a microvolt source to get a precise reading. But with a 5 el yagi on 10m, band noise completely covers internal noise on my Yaesu. On the K2, I can hear the band noise, but the internal noise is rather more than I like. Even strong signals don't move the S meter much, and that is after I have tweaked the settings, and adjusted the AGC threshold. I know audio filtering will help with this. I also did the mod to increase the gain of the RF preamp. I wonder if anyone else sees the 10m sensitivity as a problem? Is there perhaps a wider bandwidth transistor to use in place of the 2n5109? NH7O ______________________________________________________________ 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
