Date: Thu, 23 Sep 2010 07:39:24 -0500
From: "W5CUL" <w5cul@sbcglobal.net>
Subject: Re: [Amps] Pulse tuning
I use a piece of software called Test Tone Generator to pulse tune my amp.
It is set for 200Hz for one pulse tone, and 600Hz for the other. I have the
duty cycle for each tone set for 30%, which seems to work very well given I
operate SSB. It seems to me that it would be a more efficient tune if you
can mimic the mode of operation you plan on using when tuning your amp.
73,
Mike
W5CUL
## Hi mike. What else that works good is the white noise generator,
that's built into my Behringer 2496 mastering processor. The plate current
ends up exactly 1/2.... IE: dead on 50% duty cycle...but occupies the
entire TX BW..and u can't notch it out.
## Hey, somebody told me yrs ago why telco's use a 404 / 1004/ 2704/2904 hz
tone for
testing, and I have long forgotten. It had nothing to do with harmonix either.
It had nothing
to do with A/D and D/A conversions either. We were using 1004 back in the
old toll office days,
and on analog 46-A cxr systems etc, analog microwave... long before digital
multiplexer's,
and 5ESS / GTD-5 CO's came into existence. Does anybody remember the real
reason ?
## for the fellow that used to tweak microwave sites, Mike and I dabble in
ESSB, so the xcvr's
will easily pass low freqs. I can get 200 w at < 20 hz quite easily. I
retired from the telco after 34
yrs, [mike is still there ! ] and I don't want to hear 1004 hz for the next
30 yrs thank you.
Later... Jim VE7RF
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