[Amps] Pulse tuning

[Alek Petkovic]

At 12:48 AM 24/09/2010, Bill, W6WRT wrote:
>ORIGINAL MESSAGE:
>
>On Thu, 23 Sep 2010 19:58:55 +0800, Alek Petkovic <vk6apk at bigpond.com>
>wrote:
>
> >
> >Surely, with pulse tuning, you are getting the duty cycle as close as
> >possible to ssb conditions. Therefore you are tuning your amplifier
> >to the absolute optimum level.
>
>REPLY:
>
>And what is the duty cycle for SSB?  50%?  60%?  85%?  The problem is
>you can't know because it all depends on your voice characteristics and
>how loud you talk at a particular moment.


I was always under the impression that unprocessed ssb was around 30% 
- 50% duty. Sounds like a good ballpark figure.



>By tuning up at 100% those questions become irrelevant and your amp is
>happy.
>
>Bill, W6WRT


That's exactly my point. You keep presenting my argument for me.

By tuning up at 100% duty, your are not tuning to 100% output because 
your voltage has sagged.

With pulse tuning at 30% for example, you eliminate that voltage sag 
problem and you are tuning much closer to that ideal 100%.

73 from sunny Perth.
Alek. VK6APK



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