Hi Al,
What you're asking here is the efficiency of a particular amp.
Generally, commercial multiband amps for HF tend to be between 50-75%
efficient (more on 160/80/40M, less on 10/15M).
Yes the efficiency changes for all the reasons you mentioned. Especially as
you get closer to linear the efficiency goes down and as you get to class C
it is more efficient. Class C would be useable only for CW.
The SB200 was a very popular amp and delivered 500-600 watts output CW for
low cost.
73, Dan Magro
Radiodan W7RF, Portable Clinic
High quality Henry Radio RF Power Amplifiers for LESS!
New, used, unusual, classic radios, accys & RF POWER!
http://www.radiodan.com RFpower@radiodan.com
A trip to our web site is worth the click!
-----Original Message-----
From: KE3OK <ke3ok@netins.net>
To: amps@contesting.com <amps@contesting.com>
To: <amps@contesting.com>
Date: Monday, July 20, 1998 8:33 AM
Subject: [AMPS] Calculating input vs output
>
>Hi Gang,
>
>Without getting too esoteric, is there a formula or standard ratio of input
>to output? For example I have a SB-200 and the input is about 1200 watts
>and the output is about 600 watts. Does this ratio change for different
>amps/tubes/designs/modes/class? I'm kind of curious. Thanks in advance
>and 73,
>
>Al
>
>--
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>
>
--
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