Hi Guys,
As some of you guys know, the ARRL sweepstakes phone contest starts in a
few hours. It looks like I am going to have to some time this weekend to
play radio.
This is, pretty much, an exclusively US and Canada contest. I usually
only compete in the CW contests if at all, but I was thinking it might
be fun to see how many multipliers
I can work with SSB QRP power (5 watts). The only rigs I have working
well right now are a TR-7 and a C-Line.
Which brings me to my question. (quicker than usual, I know). What is
the proper way to run lower SSB power with a T-4XC. I know I need to
keep the Plate circuit resonant no
matter what power I run, but do I lower the gain control until I reach
the desired power in the tune position or do I load the finals lighter
(more capacitance) with the load control until I get
my 5 watts. I want a clean, properly modulated 5 watt signal.
(obviously). In fact, now that I think about it, how do they want you to
measure it? It's not like you can just measure the carrier like CW or AM.
I guess you just measure the peaks, except I don't have a power meter
that does that well (WH-7). I guess I could just look at the signal on a
scope and do the math. Same question for the TR-7, do I just lower the
mic gain until the peaks are 5 watts? I don't think the carrier control
affects SSB (at least it doesn't when I run PSK31 with the TR-7).
It's not that big a deal really, It's not like I am going to win the
contest. I might win my section, there was only one entry last year from
San Joaquin Valley. I am curious about the right way to run low power
SSB on these rigs, even though that isn't what they were designed for.
Thanks in advance for your thoughts,
Bob K6GGO
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