[Elecraft] K2 meter alignment issue

[Don Wilhelm]

Mike,

That is good news.  It sounds like the connector passing the RF Gain 
lines between the control board and the RF board was the problem - high 
resistance in the contact - they must be fully seated.

73,
Don W3FPR

On 6/1/2013 5:06 PM, VE3WDM wrote:
> Don just by way of update, I have now tried again to do the CAL S LOW and CAL
> S HI here are the results.
> The CAL S LOW reading is now at 164
> The CAL S HI    reading is now at 23
>
> Some odd things that have happened.
> 1. I adjusted R1 to get a voltage at U2 pin 5 of 3.80 volts. When this was
> done I was back to the old bad readings again. CAL S LOW of 255 and CAL S HI
> of nothing at all it just would not work for me I was not able to any LED
> bars to light when the RF gain was turned fully clockwise.
> 2. I then adjusted R1 so U2 pin 5 was back to 3.74 and then I tried to
> adjust again and still no luck
> 3. I then removed the boards again and looked at them as they were put back
> together. I did notice J8 was not seated fully. As I looked I found (looking
> from the back of the rig) the 2D fastener on the right side had a washer on
> it and it was under the control board and not allowing J8 to seat flush. I
> loosened the phillips screw and moved the washer forward and out from under
> the control board.When I put it back together all was working well again and
> I was able to align the S meter.
> 4. The last thing was after the alignment was done I came back to the radio
> and turned the RF gain fully counter clockwise and the S meter would not go
> to 10 but was flashing between 9 and 10 bars. I then went into CAL S HI and
> tweak it a bit from a reading of 23 to 22. All seems to be ok now.
> That's where I stand at the moment Don.
> Mike
>
>
>
>
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