[Elecraft] K2 meter alignment issue

VE3WDM ve3wdm at hotmail.com
Sat Jun 1 09:20:13 EDT 2013


Good morning Don, I check the voltages on my K2 last night and here are the
results. 
I set my 
AGC back to 3.746 from the 3.80 this way I could compare your results to
mine. 
With RF gain set to clockwise or full.  My voltage readings are to the right
of yours. 

U2 pin 5 -- 3.74 volts  3.05 volts
U2 pin 6 -- 3.74         3.06
U2 pin 7 -- 3.73         3.05
U2 pin 8 -- 8.34         8.05 (note I measured 8 volt regular and it was
8.05v)

U2 pin 1 -- 3.74        2.59
U2 pin 2 -- 3.44        2.59
U2 pin 3 -- 3.42        2.58
U2 pin 4 -- 0.00        0.00 


Q12 base -- 3.68       2.85
Emitter -----  3.42     2.58
Collector --   8.22     8.03 

Then with the RF Gain set to full Counterclockwise: 
U2 pin 5 -- 4.77 volts      3.74 volts
U2 pin 6 -- 4.77             3.74 
U2 pin 7 -- 4.76             3.74
U2 pin 8 -- 8.34             8.04

U2 pin 1 -- 4.30             3.26 
U2 pin 2 -- 4.30             3.26
U2 pin 3 -- 4.30             3.25 
U2 pin 4 -- 0.00             0.00

Q12 base -- 4.58           3.53 
Emitter -----  4.29         3.53 
Collector --   8.22         8.03

These are the voltage results and I did remove the control board from the
front panel board and examined P1 and J6. I have to give the connector on
the front panel a look at but the knobs have to come off so I can get a good
look at the board. 
I hope these readings my help you out with further narrowing it down. 
Thanks very much Don for spending all this time on the issue. 
Mike



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