Re: [Elecraft] Re: K2 and digital modes
Exactly correct Jim K4JAF - Original Message - From: "Vic K2VCO" <[EMAIL PROTECTED]> To: "WILLIS COOKE" <[EMAIL PROTECTED]> Cc: Sent: Friday, March 21, 2008 4:05 PM Subject: Re: [Elecraft] Re: K2 and digital modes WILLIS COOKE wrote: I think you are correct if one is running FSK but most people, at least a lot of people these days are running AFSK, so need linear amps. One would just about have to build a Class C amp these days anyway. I don't know of any on the market. Whether a RTTY signal is generated by actually shifting the frequency of an oscillator or by driving an SSB transmitter with a single tone that changes frequency, the result is the same: a continuous signal whose frequency shifts between two values. In other words there's no difference between FSK and what people call AFSK except the means used to generate it; and it can be amplified with a class-C amplifier if you wish! -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Re: K2 and digital modes
WILLIS COOKE wrote: I think you are correct if one is running FSK but most people, at least a lot of people these days are running AFSK, so need linear amps. One would just about have to build a Class C amp these days anyway. I don't know of any on the market. Whether a RTTY signal is generated by actually shifting the frequency of an oscillator or by driving an SSB transmitter with a single tone that changes frequency, the result is the same: a continuous signal whose frequency shifts between two values. In other words there's no difference between FSK and what people call AFSK except the means used to generate it; and it can be amplified with a class-C amplifier if you wish! -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Re: K2 and digital modes
I think you are correct if one is running FSK but most people, at least a lot of people these days are running AFSK, so need linear amps. One would just about have to build a Class C amp these days anyway. I don't know of any on the market. Cookie, K5EWJ --- Cortland Richmond <[EMAIL PROTECTED]> wrote: > RTTY works even with Class C finals! > > > Cortland > KA5S > > -Original Message- > >Date: Fri, 21 Mar 2008 15:43:28 +0100 > >From: "Simon Brown (HB9DRV)" <[EMAIL PROTECTED]> > > > >Hi, > > > >This applies to phase shift keying modes. RTTY > seems to be OK with some > >ALC - remember it's the peak power that matters, > not the average. > > > >Simon Brown, HB9DRV > > > ___ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
