[Elecraft] Installation of Q7 and Q8 HELP!!!!
Mike S
w8ur at flatsurface.com
Sun Dec 19 11:02:47 EST 2004
At 10:50 AM 12/19/2004, DR wrote...
>and there is NO way I can secure the heat sink cover. Yes, the nylon
>shoulder washer is flush with the hole on the transistors and I made sure it
>is centered, I even measured the screw to make sure I'm using a 1/2". I did
>a search to see if anyone else had a problem with this step but I couldn't
>find anything that would give me a hint as to what I'm doing wrong. I REALLY
>want to know how the heck this is going to work when all this stuff is on the
>back side and it is higher than the standoff spacers.
How much higher? You seem to imply that a 1/2" screw isn't long enough? The screw goes through the PC Board (~1/16"), a fiber washer (<1/16), a 1/8 standoff, a shoulder washer (<1/16), the transistor tab (<1/16), insulator and heatsink (~1/16); total ~3/8, leaving plenty of thread.
A "2D" fastener is about 1/4, which should be very close to the fiber washer (<1/16), a 1/8 standoff, shoulder washer (<1/16), the transistor tab (<1/16), and insulator.
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