I'll show my age by doing this, but lets revert mentally back to the
Collins S Line. The transceiver, using a pair of 6146's in the PA, was
most efficient and linear when properly tuned and loaded. It produced
about 120 to 140 watts of PEP output. And there was NO Power control or
method
Not sure I see the difference. AVC [now called AGC aka audio
compression], at it's simplest rectifies the audio from the detector and
uses it as variable bias on one or more of the IF stages such that the
IF gain is inversely proportional to the audio level. The original goal
was to provide
“The modulator” means “the modulator code in the DSP” of course. If the
compression is done by RF limiting, I expect that is also done in the DSP.
The ALC you are describing is transmitter gain ALC. That is different from
audio gain ALC.
wunder
K6WRU
Walter Underwood
CM87wj
"If so, the ALC would be before the modulator and compression after it."
I remember modulators but there isn't one in my TS-590. I doubt there is one
in any modern rig. In the TS-590 architecture compression is done in DSP
(Digital Signal Processing) and ALC is applied way down path at a TX
ws6x@gmail.com wrote:
>> -Original Message-
>> From: elecraft-boun...@mailman.qth.net On Behalf Of Fred Jensen
>> Sent: Sunday, January 30, 2022 4:10 PM
>> To: Elecraft Reflector
>> Subject: [Elecraft] What happened to ALC?
>>
>> I can remember
It sure does.
> -Original Message-
> From: elecraft-boun...@mailman.qth.net On Behalf Of Fred Jensen
> Sent: Sunday, January 30, 2022 4:10 PM
> To: Elecraft Reflector
> Subject: [Elecraft] What happened to ALC?
>
> I can remember, shortly after SSB appeared on th
Reflector
Subject: [Elecraft] What happened to ALC?
I can remember, shortly after SSB appeared on the ham bands that "ALC"
showed up and was immediately inducted into that top category of things like
canned beer and sliced bread. It would reduce the dynamic range of your signal
and fill o
I expect that ALC is being used for two different parts of the transmission
chain.
Audio ALC would reduce the dynamic range of the audio. That automatically
reduces the microphone gain to maintain a consistent level of modulation. That
would be inside the audio part of transmitter, before the
-Original Message-
From: elecraft-boun...@mailman.qth.net On Behalf Of Fred Jensen
Sent: Sunday, January 30, 2022 4:10 PM
To: Elecraft Reflector
Subject: [Elecraft] What happened to ALC?
I can remember, shortly after SSB appeared on the ham bands that "ALC"
showed up and was i
I can remember, shortly after SSB appeared on the ham bands that "ALC"
showed up and was immediately inducted into that top category of things
like canned beer and sliced bread. It would reduce the dynamic range of
your signal and fill out your RF envelope with DX inducing energy. It
didn't
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