[Elecraft] KX1: Problem with 30 M Module Installed

[Phil Wheeler]

Found and fixed.

It was on the 30 m PCB.  I installed the resistors at R1 and R2 and the 
inductors at R3, R4 and R5.  Of course, any fool knows that the 
resistors should be at R4 and R5, not R1 or R2. Clearly R1, R2 and R3 
should be inductors :-)

Anyway, thank god for a good solder sucker.  R&R ing these tiny parts 
after they have been flush cut is no picnic under the best of circumstances.

I was able to do it in situ, by removing only the two insulated wires to 
the main PCB and rolling the 30 m PCB up. When I started I figured it 
was 50-50 that I would be ordering a new 30 M module next week.  Went 
faster and better than I had hoped.

Not sure how well it is working on 30 m.  My 30 m dipole came down in a 
windstorm and I cannot put it up again now (medical constraints preclude 
climbing on ladders for a while).

Now I can sleep well (about time, after midnight!) and do the KXAT1 or 
whatever it is named on the morrow .. and have this rig finished!

73, Phil

Phil Wheeler wrote:

> Ugh!
>
> Installed the 30 m module and at power on, no LED.  Resistance checks 
> say the 5 V line (MCU pin 1) is shorted..
>
> Since the insulated lines 5 and D connect tothe 5 V line, and they 
> look to be correctly installed .. and I can see no shorts on the bare 
> wires .. this suggests something is amiss on the 30 m PCB itself.  
> With the components all invisible with it installed, I will need to 
> remove it to see what is going on.  Unfortunately, there is no table 
> of resistances fot this simple board.
>
> R&R of the 30 m PCB is a bitch, to say the least.
>
> Before I do it, does anyone have some thoughts?  It does seem unlikely 
> that there could be a problem with such a simple item, aside from a 
> component defect.
>
> I'd better sleep on it.
>
> 73, Phil
>
>>  
>>
>
>
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