[Amps] pulse tuning

[Roger]

On 9/20/2010 7:58 AM, Bill, W6WRT wrote:
> ORIGINAL MESSAGE:
>
> On Mon, 20 Sep 2010 02:27:31 -0700, "Jim Thomson"<jim.thom at telus.net>
> wrote:
>
When tuning most of today's amps the best we come up with an 
approximation of best tuning. It may be a very close approximation, but 
it's highly unlikely "right on". Still, *usually* is good enough.  Few 
amps have a PS with good enough regulation to properly tune at full 
carrier. When you operate SSB and CW after tuning up at full carrier 
your output will be higher than that for which you tuned.

>>
>> ##  50% works good too.  Now, if you really want to load down the HV supply, you can
>> increase the  duty cycle to well above 50%...like  60-90%.
>
I prefer the much shorter duty cycle,

> REPLY:
>
> Or best of all... toss the pulser and tune at 100%. A side benefit is
> you won't sound like a jammer.  :-)

I've never thought of them that way and it sure sounds better than 
Ahhhhlllllllllllooooooooo...<whistle><whistle>. OTOH I use the antenna 
analyzer to give R=50 X=0 for the amp, tune into the dummy load and 
never put a tune up signal on the air any one can hear except my 
neighbor.<:-))

73

Roger (K8RI)


>
> Bill, W6WRT
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