OK Don, well it must be controlling the gain of the first IF amp then, and that must be important to the receiver's noise figure. All I know is that turning down the RF gain reduces S/N (on my K3 at least). And this wasn't the case in f/w 3.27.
Graham ----- Original Message ----- From: "Don Wilhelm" <w3...@embarqmail.com> To: "Graham Kimbell (G3TCT)" <g3...@lineone.net> Cc: "Elecraft reflector" <elecraft@mailman.qth.net> Sent: Thursday, December 17, 2009 6:36 PM Subject: Re: [Elecraft] Noisy K-3 Receiver > Graham, > > BUT - the K3 "RF Gain" control ONLY controls the IF gain - it does not > reduce the gain of the receiver front end - in that respect, the K3 is > similar to those other receivers that you referred to.. The preamp and > attenuator DO change the front end gain. > > 73, > Don W3FPR > > Graham Kimbell (G3TCT) wrote: > > This is a major irritation that has only surfaced with recent firmware > > changes - the problem wasn't there in f/w 3.27. Other receivers I've used > > keep the S/N constant with the rf gain backed off presumably because they > > are reducing the IF gain further back in the rx. > > > > > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
