KX1 - Normal position of the AF gain control?

[Martin Gillen]

Hi.

I was aligning my receiver yesterday (Phase II).

I noticed that the AF gain seems to be exponential,
which is to say that rotating it from 200 degrees
(fully left rotated) up through 0 degrees (halfway)
produces only a little bit of volume increase.
Rotating from 0 degrees to 90 degrees brings the
volume up to what I would consider a normal level,
then from 90 degrees to fully rotated to the right
causes a very noticeable increase in volume.

So my KX1 will have the volume control 3/4 rotated
(pointing at about 110 degrees) most of the time.

Is that normal, or perhaps my headphones were of the
wrong impedance?

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[Andrew Moore-4]

> So my KX1 will have the volume control 3/4 rotated
> (pointing at about 110 degrees) most of the time.

Mine does a similar thing... though with headphones, the volume level is
plenty loud with the pot pointing to around "9 or 10 o'lock".  With an
external speaker I need to crank it around to about "3 or 4
o'clock" (and it's very exponential in this region as you mention).

I'm using iPod headphones, and an  MFJ ClearTone speaker as an external
speaker.  Not sure what the impedances are offhand.

Worked 18 stations in 12 U.S. states on the KX1 last night from 4 W to a
28-foot long wire tossed in the tree.  I'm totally new at QRP and love
every minute of it.  This KX1 is fantastic!!  I'd like to see a few
refinements but I suppose everyone has a "wish list" for that sort of
thing.  What a great little rig.

--Andrew, NV1B


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