Hi Brian:
Not so on my K3. No specific voltage levels available, but with the
sound card Line In gain set to 50%, I had to turn down the LINE OUT
level to 28 - 30 to keep from overdriving the sound card. There was
plenty of volume from the l'il Dell speakers to fill the room with the
"Master Volume" sound card control set to 50%.
73,
Ken K3IU
K3 #202
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
K3KO wrote:
Had two reports of LINE OUT "level" on this posting.
With LIN OUT at 100:
1) 500 -700 rms mv when tuning across band
2) When attached to sound card, max sound card gain had to be used to get
decent signal.
Perhaps LINE OUT levels are indeed too low.
73 de Brian/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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