You haven't told us what settings you have on ATT/PRE, per band. That would make a huge difference in how things worked out. 73, Guy
On Thu, May 19, 2011 at 7:59 PM, Fred Jensen <[email protected]> wrote: > Lots of good info comes from this list. I segregated all the recent > "How to set AF and RF Gains" postings to try and see if I'm missing > something since other than the EQ settings [K9YC's for SSB TX and "try > to emulate my hearing aid response" for RX], I run pretty much > out-of-the-box-defaults, AGC on, RF max, AF for volume, and am a really > happy ham. > > In olden days, which have been mentioned here a lot, we ran CW [and SSB > unless you had a new receiver with a product detector] with AF gain > firewalled and RF gain for adjustment. The reason for this, although no > longer valid with a K3, was to equalize the signal and the BFO injection > amplitudes. Minimum distortion occurred when they were about equal, the > BFO amplitude was fixed, so you adjusted the signal level through the > receiver to sort of the same amplitude. The right point was fairly > obvious. The S-meter followed the RF gain control ... that's just how > it was. > > AGC used to be a somewhat brute force thing ... 1st mixers had to be > protected so the AGC line hit the RF stage(s) as well as the IF's. > SX-28? My K3 seems to have an exquisitely designed AGC system [well, > more than one]. I run with it on, I've tweaked the threshold so it's at > my normal noise floor, and my RF gain is at max. > > I cannot tell any difference between my ability to copy very weak CW > signals in my normal configuration, and when trying to ride RF gain. In > light of all the reflector chatter on this subject, I've tried to make > this work [I'm retired, I have time :-)]. The WIDTH knob can help, the > APF function can be a big help under some circumstances [not all], and > very occasionally, the manual NOTCH will make a difference. Other than > that, it seems letting my K3 do its job by itself, AGC on, RF max, AF > for volume, works best. > > What am I missing here? > > For the record, my K3/100 is pretty vanilla: One Rx, "stock" filters, > KDVR, KAT3. I have several locals within 3km of me, their rigs are very > quiet on CW, they are the only signals that get much above S9+20, and I > can get well within 1 KHz of them in contests and still work the weak > ones. They haven't complained, I hope I'm not getting too close :-) I > don't operate SSB a lot, usually only in contests to support my contest > club. If that's what this is all about, I apologize for the BW. If > it's CW, I'm either missing something or I guess I'm less discriminating > that most. > > 73, > > Fred K6DGW > - Northern California Contest Club > - CU in the 2011 Cal QSO Party 1-2 Oct 2011 > - www.cqp.org > ______________________________________________________________ > 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
