No sidetone audio in phase 1 of RF board test (tone generator)

[Jeff Kinzli]

[Resending due to spam bounce]

Hey guys,

Having a little trouble here with K2 #5945. I just completed phase 1
of the RF board, and am going through the phase 1 testing. The rig
powers up, displays the "Elecraft" sign on the LCD, relays fire when
changing bands, everything *looks* like it's working...except...

When I do the test for "audio amplifier and tone generator test"...I
have a pair of headphones plugged into the headphone jack and hear
nothing, nada.

In the previous test, using the frequency counter, I got 3999.98,
which is per spec of within 0.02.

When the radio is on, I hear nothing also, but I figure that's ok
since there's no receiver capability built yet.

Anyone have any suggestions on where to start? I've gone through the 3
boards and see no obvious solder problems.

Thanks for any ideas.

Jeff
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[Jeff Kinzli]

Problem solved - pin 7 of U9 on the control board had a somewhat flaky solder joint, looked good, but wasn't solid. Resoldering that joint fixed the problem.

Moral of the story: test a bit more before bothering you guys :)

-Jeff

On Sat, Jan 13, 2007 at 02:00:36PM -0500, Jeff Kinzli wrote:

> [Resending due to spam bounce]
>
> Hey guys,
>
> Having a little trouble here with K2 #5945. I just completed phase 1
> of the RF board, and am going through the phase 1 testing. The rig
> powers up, displays the "Elecraft" sign on the LCD, relays fire when
> changing bands, everything *looks* like it's working...except...
>
> When I do the test for "audio amplifier and tone generator test"...I
> have a pair of headphones plugged into the headphone jack and hear
> nothing, nada.
>
> In the previous test, using the frequency counter, I got 3999.98,
> which is per spec of within 0.02.
>
> When the radio is on, I hear nothing also, but I figure that's ok
> since there's no receiver capability built yet.
>
> Anyone have any suggestions on where to start? I've gone through the 3
> boards and see no obvious solder problems.
>
> Thanks for any ideas.
>
> Jeff

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[Ron D'Eau Claire-2]

Sometimes you have to ask the question to immediately discover the answer
for yourself.

Ron AC7AC

-----Original Message-----
Problem solved - pin 7 of U9 on the control board had a somewhat flaky
solder joint, looked good, but wasn't solid. Resoldering that joint fixed
the problem.

Moral of the story: test a bit more before bothering you guys :)

-Jeff

_______________________________________________
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Post to: [hidden email]
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Subscriber Info (Addr. Change, sub, unsub etc.):
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Elecraft web page: http://www.elecraft.com