[Elecraft] Horrible Audio

[Dave Gingrich K9DC]

At 21:54 7/29/2002 -0500, Brian wrote:
>My K1, #1205, has almost unbearable audio.  The audio is very muddy,
>no clarity to it at all. It's like it's muffled almost.  This is with
>the filters open in the widest mode. I've tried about 8 pairs of
>stereo headsets, all sound about the same. Is this common?  I should
>have spent more time using a K1 before blowing $500 on this one.

Brian,

I'd be happy to have you stop by and we could compare our K1 audio. It is 
only 800 Hz wide at the widest.

>Tried to install the KAT1 tonight as well, that was futile.  I have
>the Rev E RF board, so I am assuming I don't have to cut any traces
>based on the errata sheet.  I removed the jumper from pins 2 to 10 on
>J2 on the filter board, moved the jumper down by the antenna jack to
>the ATU position.  I got to ATU menu and there is the dreaded "---"
>and I can't make it go away.  I have checked the ATU board with a mag
>glass and bright light until I am crosseyed.

Do you have the chips installed in the correct orientation?  How about the 
voltage and resistance checks? did they all pass?

>Then the part that baffles me.  The KAT1 comes with a 3 hole and a 10
>hole block.  These are already installed on the filter board (4 band).

Extra connectors are normal. Remember that not everyone builds it all at 
once, also the KAT1 came out after the K1.

>The ATU doesn't want to fit correctly...or does it...is there supposed
>to be a 1/4 inch gap in the jack and the pins?  The KAT1 doesn't fit
>all the way down on the J1 and J2 with the metal standoffs in place.

That is normal. There is supposed to be a gap.

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Dave Gingrich, K9DC - Indianapolis, Indiana  USA
K2 #2211, K1 #931, QRP-L #2376, ARS #1109,
FPQRP #389, IRLP 473/573,  k9dc.ampr.org
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