I think understand this but then of course I thought I understood
Economics 101 in college which turned out to be seriously untrue ...
Turning the MIC GAIN way up on say an HT-37 increased the drive to the
PA and eventually saturated it, creating havoc on the band.
The K3 does not control power with the MIC GAIN. The PWR control sets a
"requested" power output. The internal power control loop then measures
the power level of the RF being made and adjusts it to meet the
requested level.
On SSB [and AFSK/DATA A] the MIC GAIN needs to be high enough so that
the power control loop can meet its target power, That's the first 4
bars of the ALC meter. Anything higher than that just lowers the system
gain til the target power is met. Or something like that [while waving
arms]...
I would imagine that turning the MIC GAIN way up would get a lot of
extraneous room noise onto your signal. I don't get on SSB all that
often, but mine is set for 4 bars with the 5th just flickering on peaks,
and 10 dB compression on peaks. Other people seem to like it when I
talk to them.
73,
Fred K6DGW
- Northern California Contest Club
- CU in the 50th Running of the Cal QSO Party 3-4 Oct 2015
- www.cqp.org
PS: There was never any doubt that I did *not* understand O'chem.
On 6/8/2015 10:56 AM, Richard Fjeld wrote:
Just a comment somewhat related to this thread. Not long ago, a ham
with an SDR set-up was comparing signals in a round-table for proper
bandwidth.
He said my signal was very clean and asked me to crank up my Mic gain
to the max which I reluctantly did for a short transmission. He said
it stayed clean with no splatter. Can that be? I thought any radio
would splatter if over-driven.
For me, seeing is believing. Dick, n0ce
Date: Sun, 7 Jun 2015 16:58:26 -0400 From: li...@subich.com To:
elecraft@mailman.qth.net Subject: Re: [Elecraft] K3-P3 SSB
spectrum
The TX Monitor is a time domain display - not a frequency domain
display. If you want to see the frequency domain display of your
own signal, temporarily disconnect the RS-232 cable between the two
(or connect another SDR to a directional coupler in the antenna
line).
73,
... Joe, W4TV
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