[Elecraft] [K2] Q7/Q8 base voltage

[Jukka Tarvainen]

Thank You Don and others who replied directly!

I checked those resistors to be correct value. This K2 is >3000, so 100
ohms on R60. Then I continued with PA transistor installation. K2 works
now, a bit low output on 20 and up. Low bands easily ten watts. I will
check BPF tuning later.

After I will install options one by one and check operation after each add
(Rework eliminators are in use now). KPA100 I will change 1N5711 diodes
just to be safe.


73 de Jukka OH4MFA, OG4T


2017-09-08 19:27 GMT+00:00 Don Wilhelm <donwilh at embarqmail.com>:

> Jukka,
>
> Measure the values of R59 (4.7k), R60 (100 ohms), R61 (120 ohms), and R62
> (2.7k).
> If this is a K2 with a serial number below 3000, R60 will be a 100 ohm
> potentiometer - set it to full counterclockwise rotation or replace it with
> a fixed 100 ohm resistor.
>
> Even though 0.65 volts is slightly higher than I like to see it, that
> voltage will be OK.
>
> 73,
> Don W3FPR