Drake?? What about Collins and the 75A4 that had a fine shift control on the front panel, done mechanically/electrically but was well before Drake had a radio.. Width was controlled by filters. Merv KH7C
>> Originally, IF shift was defined as moving one IF passband >> within another IF passband, making the resulting passband the >> intersection (not the union) of the two passbands. >> > > Again, you are incorrect. Drake implemented a shift control long > before any of the Japanese imports and its shift moved the entire > passband without changing the width. Width was controlled > separately, in discrete steps. > > Many of Yaesu's transceivers ... going back to the 1970's ... > also had independent shift and width controls. Even today > the FT-1000D, FT-1000MP, Mark V, FT-2000, FT-9000, etc. have > width and shift controls that are independent and behave > exactly like the K3 in Width/shift mode. > > It was only when Kenwood eliminated the third filter and > failed to link the mixers that shift/width became effectively > a high cut or low cut filter. > > Like so many other features of the radio, what you prefer > depends on what you first used. For me, the current Elecraft > design is the right way to do shift and width. Even better, > I can select independent shift and width for CW and digital > operation or high/low cut for SSB operation at the press of > the encoder (or if I select 10 Hz steps for shift the behavior > can change automatically as I change between voice and CW/data > modes). > > 73, > > ... Joe, W4TV > > > > > >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]] On Behalf Of Al Lorona >> Sent: Tuesday, December 29, 2009 6:18 PM >> To: Elecraft Reflector >> Subject: Re: [Elecraft] Filters for K3 >> >> >> >>> It depends entirely on which brand of radio you were using >>> and how the manufacturer implemented IF shift and/or width. >>> >> Originally, IF shift was defined as moving one IF passband >> within another IF passband, making the resulting passband the >> intersection (not the union) of the two passbands. >> >> When you do that, you effectively reduce the width *and* the >> center frequency of the IF passband... it has nothing to do >> with manufacturers failing to make it work correctly. >> >> Take two pieces of paper and cut a square in each. Hold them >> up to a window, and slide one square horizontally across the >> other one, and note how the width *and* center of the opening >> shifts left or right. This is what I mean when I say, "IF >> shift". We might be talking about two different things. >> >> Regards, >> >> Al W6LX ______________________________________________________________ >> 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 > > ______________________________________________________________ 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
