[Elecraft] Fw: K2 PA repair kit

[n0jrn]

----- Original Message ----- 
From: "n0jrn" <n0jrn at mchsi.com>
To: <don at w3fpr.com>
Sent: Sunday, January 24, 2010 7:53 PM
Subject: Re: [Elecraft] K2 PA repair kit


> Thanks Don and all:
>
> R50 is already a 1/2 watt and is in good shape.
>
> I do have good desoldering equipment and now have Q7, Q8, Q11 & Q13 off 
> the board with no problems.
>
> Going back to the game and will follow your advise when reinstalling all 
> transistors.
>
> Since the info I got from archives was incorrect,  it was good that I ask 
> the pros.
>
> Everyone have a great evening
>
> I'll see ya after the game
>
> 72         Jerry
>
>> That is a 1.5 ohm resistor (1/2 watt) included with the kit and is to
>> replace the emitter resistor of Q6 if needed - so check while you have
>> the rear cover/heat-sink removed.  If R50 is a 1/4 watt resistor,
>> replace it with the 1/2 watt - if it is already a 1/2 watt, check to see
>> if it is open - if so, replace it with the new one.  If neither of these
>> conditions apply, you have a 1.5 ohm resistor for your junk box.
>>
>> No need to remove T3 - that is simply one technique to remove the
>> voltage from the collectors of Q7 and Q8 while troubleshooting the
>> problem, but since you will be removing Q7 and Q8, there is no need to
>> do anything with T3, just leave it in place.
>>
>> Be careful when removing components not to damage the thru-plated
>> holes.  If you do not have good de-soldering tools, cut the leads off
>> the components and remove them from the holes one lead at a time - clean
>> up the holes with solder wick, or if necessary a stainless steel needle
>> or a wooden toothpick pushed into the hole while the solder is molten
>> will clean them ni
>