I like to think of ALC as receiver AGC in reverse. Done properly, it
results in minimal distortion while keeping the signal level nearly
constant. As far as I can tell, commercial transceivers have all been
doing this pretty well for a long time.
What I've never been able to figure out is why it's so hard to close the
ALC loop around an external amplifier. If it works with the 100 W
amplifier built into the transceiver, why won't it work with a bigger
amplifier? (And it seems about universally agreed that it won't.)
73,
Scott K9MA
On 7/12/2019 23:32, Wes wrote:
You do know that the K3(S) uses a slow ALC system for power control
don't you?
Wes N7WS
On 7/12/2019 8:53 PM, Brian Denley wrote:
Nothing when that’s what you want. But using ALC to control xcvr
power is uncontrolled compression that may or may not be desired.
Brian
KB1VBF
Sent from my iPad
On Jul 12, 2019, at 4:09 PM, Wes <[email protected]> wrote:
And what exactly is the problem with compression? It's used all
over the place.
Wes N7WS
On 6/28/2019 11:38 AM, Brian Denley wrote:
I have always thought that ALC is not appropriate for power
control. It’s a protection system. Over use of ALC acts like
compression. No?
Brian
KB1VBF
Sent from my iPad
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Scott K9MA
[email protected]
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