[Elecraft] K2 PA replacement kit

[Don Wilhelm]

Dan,

Yes, the 2N2222A transistors are for Q11 and Q13.  Many times a PA 
transistor failure will take out those as well.
Yes, the 1/2 watt resistor is for R50.  If you have an old K2 with the 
1/4 watt R50, replace it with the 1/2 watt.
Only the rear (heatsink) half of the bottom cover needs to be on for the 
test.  Do NOT transmit with no heat sink on the PA transistors - that is 
a sure way to send them to their early demise.
Try it first at 2 watts - if all is OK, then try 5 watts, and finally 
try 10 watts.  You can also try maximum power if you want - keep the 
transmit (TUNE) times short for the 10 watt and max power tests.

Dan Grizzard wrote:
> Hello all,
>
>          I just got my PA transistor replacement kit and have a couple of items I want to clarify:
>
> 1)      the 2n222a transistors I assume are for Q11 and Q13
> 2)      the resistor coded brown-green-gold is for R50 in the Q6 driver circuit. Only one in the entire rig.
> 3)      does both sections of the bottom need to be on for testing or just the front half?
> 4)      when adjusting the transmit power is the maximum power out limited to 2 watts, 5 watts, 10 watts respectively at the 2 watt, 5 watt, 10 watt test level?
>          
>   
>