[Elecraft] K1 RF board DC checks failing

[Mike Clarke]

Hi all,

Having received and fitted the replacement voltage regulator that
solved my previous K1 problem, I've moved on to the first DC checks on
the RF board (page 30 in my manual.)

I'm performing the checks with the board connected to a stable supply
at 13.8 volts.

The first two checks pass fine, but the second two state that I should
be reading between 3.8 and 4.2 volts on U3 pin 5, and between 7.6 and
8.7 volts on U3 pin 6.  I'm actually measuring 3.66 volts and 7.54
volts, respectively.

Normally these might count as 'close enough', but given the quality of
the manual (and my soldering!) I'm inclined to think I've gone wrong
somewhere!  Can anyone offer a suggestion as to what I might have
done?

Thanks and 73,

-- 
Mike, M0PRL.