[Elecraft] Re: No sidetone audio in phase 1 of RF board test (tone generator)

[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