Actually, you will probably LOSE a couple of db by switching on both preamp and attenuator compared to having both switched off. (Measure your MDS and compare results if you don't believe...)
Regarding weak signals, one factor that is overlooked is the ATU. By switching it to bypass you can gain 5 or 6 db in MDS. Of course, you would want to switch it back on when you transmit. I wonder if the ATU could be programmed to automatically be bypassed on receive? You would perhaps not want the ATU to be switched in and out at break-in speeds, but after a suitable semi-breakin delay. I think that would be a handy option for weak signal work for those of us who must use the ATU. 73, Drew AF2Z On Tue, 10 Aug 2010 13:28:01 -0400, Tom W8JI wrote: >> This is NOT a bug, this is working EXACTLY as it should. Some time you >> want to have a little extra gain, but not as much as the Pre does alone. >> In this case you will run the Pre ON, and the ATT on at the same time. No >> bug there. Just another way Elecraft has made the K3 a versatile rig for >> finding weak signals in a loud noise floor. > > >The question is not gain, because 2 dB of additional gain is not >significant. > >The question is how running both the preamp and attenuator affects dynamic >range. It probably decreases dynamic range. > >I guess no one has measured it. > ______________________________________________________________ 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
