[RTTY] RTTY AMPLIFIER QUESTION..

[John Barber GW4SKA]

My homebrew 4CX1000 amp has always been run in Class C for RTTY. The extra 
power is hardly worth bothering about; the benefits are in general 
reliability with less strain on power supplies, cooler shack, less fan noise 
etc.

73,

John GW4SKA


----- Original Message ----- 
From: "Jack West" <w7ld at theriver.com>
To: "RTTY GROUP" <rtty at contesting.com>
Sent: Tuesday, March 17, 2009 4:00 AM
Subject: [RTTY] RTTY AMPLIFIER QUESTION..


>I have been wondering about operating HF Amplifiers in RTTY mode.
> It seems logical to me that when I run FSK it should be OK to operate
> my amp in "CLASS C" vice a linear class of CLASS B or AB2.
>
> My thinking is this:  In FSK it is essentially a CW signal operating on
> two separate CW frerquencies, alternating, with a seperation of 170 hz.
> Thus, it is OK to run my amp in maximum efficiency in Class C.
>
> In the case of AFSK, it seems to me since the signal is generated by
> audio tones, the amplifer needs to be operated in a linear fashion as
> you would with any other sound card generated mode.
>
> So am I right?  Can I get more horsepower out of my amp by running
> it in Class C in FSK RTTY and not worrying about linearity?
>
> Waiting to hear from the RTTY Gurus...
> 73 de
> Jack / W7LD / "Lucky Dog"
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