----- Original Message ----- From: "n0jrn" <n0...@mchsi.com> To: <d...@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 > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
