Pay
dirt !! My 480s arrived. YES !! In fact, I found time to
complete one of the PCBs. :-) I used the water clean
solder for all of the parts normally used except for the transistors.
Then, I did my last board wash prior to putting on all the parts where I used
no-clean (the usual suspects). Last to go on mine were the tempcos and
transistors since heat compound was involved.
I did
my transistors slightly different. I cut about a 3/8" length of
heatshrink. I put my transistors face to face with a little heat goop, and
then put heat shrink around (and heated) the combination to hold them
tightly together. Then, I soldered the "six-legged" device onto the
PCB. I know my pairs are heat bonded. Now, maybe I have taken
some of the cooling away from the transistors. But, I am betting it is not
enough to matter.
So,
right or wrong, that's my $.02.
Larry
-----Original Message-----
From: Chris Walcott [mailto:chris@...]
Sent: Tuesday, January 18, 2005 11:46 AM
To: MOTM List
Subject: [motm] 480 kit question
I was wondering about the pre stuffed board. The
instructions says to use no-clean solder after all the resistors are soldered
in. But that means using no-clean on a lot of parts that normally get organic
solder like caps and the power connector.From: Chris Walcott [mailto:chris@...]
Sent: Tuesday, January 18, 2005 11:46 AM
To: MOTM List
Subject: [motm] 480 kit question
Any special reason why the change?
--
Chris Walcott
Chief Engineer
Fake Science
email: chris@...
website: www.fakescience.com
phone: +1.510.336.1241