[Elecraft] K2 AGC and CAL HI LO value question

[VA2SS]

Hi,

I had a few problems in the past (builder's mistakes hi!) with my K2.

Today, I suspect that these problem affect the AGC on my K2.... when setting
up the CAL HI and LO, my actuel readings are CAL HI set at 013 and CAL LO
set at 184 when U2 PIN5 is set to 3.8V.

I also found she using the K2 that the AGC a little bit too generous or
"exited"... hi !!

I found an old post of Don giving many values with a K2 used for the the
test. I set the U2 PIN5 at 3.74 like in the post and do a few measurement
with 3.74V value.

There are a few differences from the Don previous post, listed below (Don's
settings are on the right) :

RF gain Full CW

U2 PIN1 = 3.77 instead of 3.74
U2 PIN2 = 3.70 instead of 3.44
U2 PIN3 = 3.73 instead of 3.42
Q12 B = 3.9 instead of 3.68
Q12 C = 7.88 instead of 8.22

RF gain Full CCW

U2 PIN1 = 4.39 instead of 4.30
U2 PIN2 = 4.39 instead of 4.30
U2 PIN3 = 4.38 instead of 4.30
Q12 B = 4.66 instead of 4.58
Q12 C = 7.88 instead of 8.22
Q12 E = 4.38 instead of 4.29

Control Board

P1 PIN5 = CW 3.74  CCW 3.98
U6 PIN3 = CW 3.45  CCW 4.40

Are these values are inside the normal range ?

Am I too picky with my expectation ?? Hi !!

Thanks for your help.

73

J-F VA2SS




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