Brian,
Something is wrong - 1/4 inch screws should be plenty long - dumb question,
are you really using the 1/4 inch screws? - they are NOT the black ones.
The only thing the screw should pass through is the lockwasher and the
transistor (yes the thermal pad too) before it hits the heatsink. Those
transistors MUST sit in direct contact with the heat sink or they will not
last very long, so do check carefully to be certain there is no gap below
the transistors.
Good luck and 73,
Don W3FPR
- Original Message -
From: Brian Wruble [EMAIL PROTECTED]
To: elecraft@mailman.qth.net
Sent: Friday, July 09, 2004 3:24 PM
Subject: [Elecraft] KPA-100 Q1,Q2,Q3,Q4 screws to heat simk question
Hi all: I am just nearing completion of the 100W upgrade to my K2. I am
unable to get the 1/4 4-40 pan head screws to reach far enough through
the
board to catch the threads in the heat sink UNLESS I leave off the lock
washers. Without the lockwashers, everything seems to fit perfectly.
I'd appreciate any thoughts or advice on this. Thanks.
73 de Brian W3BW
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraftHelp:
http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraftHelp:
http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
