[AMRadio] AM Amps

Geoff w5omr at w5omr.shacknet.nu
Tue Jan 11 11:50:56 EST 2005

Robert M. Bratcher Jr. wrote:

> If I wanted more than 100w of AM (out of my Collins 23V-3) then I'd use 
> it for carrier only then plate modulate an amplifier with a modulation 
> transformer (if I could find one) plus a speech amp. Then I'd run the 
> maximum legal AM power of 375 watts.
> But then I run AM on the KW-1 (pure DSB AM) & sometimes the KWS-1 (which 
> does carrier plus one sideband) at the 375w limit. I'd prefer to do AM 
> at a kilowatt but thats not legal anymore.
> I wonder how many AM'ers run more than the legal 375 watts? I've thought 
> about it...

Bob, there is no "magic number" of 375w of carrier being "legal" 
for AM.  What's legal is 1500w PEP output from the transmitter. 
This, by the way, is damned difficult (but not impossible) to 

If it were me, and I wanted to run a rig that wasn't covered up 
with neighbors (like I am!) I'd load the final to 500w DC Input 
and let'er run wild to where EVER the peaks went!

73 = Best Regards,

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