[Elecraft] K3 CONFIG LIN OUT
K3KO
alsopb at nc.rr.com
Fri Apr 4 10:32:28 EST 2008
Tnx reply.
Don't know why I said pre-AGC. Manual clearly says post AGC.
Wasn't worried about too much voltage. Rather concerned about too little--
given that the output is intended for sound card inputs. Was hoping to
identify if this were a problem before arrival.
Will do the measurements after the K3 arrives. The measurements will be
"plug in TNC". Hopefully LIN OUT will have enough range to get to the -3dbV
my current line out audio source provides.
73 de K3KO
Lyle KK7P wrote:
>
>> Anybody know just what the voltage range can be put out at the line out
>> jack?
>>
>> Since it is pre-AGC it isn't a "constant level" output but instead varies
>> with signal strength. CONFIG LIN OUT apparently adjusts the level.
>
> It is in fact post-AGC. CONFIG LIN OUT adjusts the gain of the post-AGC
> amplifier that drives LINE OUT.
>
> Most claims of "constant level" output are actually "fixed gain after
> AGC", same as the K3.
>
> Your specific case of 1.7 V RMS is 4.8V p-p. The driver for the LINE
> OUT output operates from a 3.3V supply, so it probably will not
> overdrive your external device in any case.
>
> 73,
>
> Lyle KK7P
>
> (You can measure the output with a multimeter in your particular setup
> for your particular AGC and other settings.)
>
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