[Elecraft] Anything else in TX

[Don Wilhelm]

Jerry,

Yes, the PA kit seems to be in order for your K2.
Remove the KAT2 for the initial testing and run the K2 directly into a 
good 50 ohm dummy load.  No sense in confusing the issue with 'extras' 
that could add confusion to the results - take things one at a time and 
verify each one before adding an additional element.
After you get the PA kit installed, check the DC voltage at the base of 
Q7 and Q8 during a TUNE operation - it should be close to 0.6 volts - if 
it is greater than 0.63 volts, you likely have a problem in the Q11/Q13 
circuit (damaged thru-plated holes).

Once the K2 PA is under control, you can add either the KAT2 or the 
K60XV - do that one at a time and stop if the option added does not 
check out properly.  I suggest verifying the KAT2 first.

If you are using the KAT2 and the K60XV together, be certain you have 
changed KAT2 R6 from 47 ohms to 470 ohms - there was a 470 ohm resistor 
provided with the K60XV kit.

73,
Don W3FPR

n0jrn wrote:
> Don:
>
> A little more explanation is in order.  I have the cover off the K2. 
> XV50 is not connected at this time.   K60XV board is still plugged in.
>
> I now have Ant 1 of the KAT2 hooked to my dummy load with watt meter in 
> series.  Checking voltages at Q7 and Q8 reveal the collector voltage on both 
> are way down during transmit.
>
> Collector voltage on Q13 during transmit is also low.
>
> I've got the manuals for the XV50 & K60XV and I'm going digging for the 
> source of my mismatch.
>
> For now,    I have ordered the PA kit for the K2 and I'll get it back up and 
> running.
>
> Is there anything I need worry about in the K2 other that Q7, Q8, Q11 & Q13 
> ????
>
> 72       Jerry
>   
>