[ICOM] Need 2n3771's
Paul Gates, KD3JF
pearly732003 at yahoo.com
Fri Jan 5 19:32:56 EST 2007
Thanks for the email. Think I will print it out!! I was gong to ask about the Thermal grease.
Sunday I will check everything out.. The one transistor I took out was looking at the rear of supply the upper one to the extreme left. And that one is definitely bad.
Paul, KD3JF
K6STU at aol.com wrote:
HI Paul.
Mouser's phone number is 1-800-3466873.
Part number for the transistor is # 512-2N3771. $1.88 each.
Part number for the 0.05 Ohm 1% resistor is 71LVR5-0.05/R $1.34 each.
Also go to radio shack and buy a small tube of thermal grease. It is a
white heat conducting grease. It looks like toothpaste. Be sure to put a thin
layer on the transistor then place the mica insulator on top of the transistor.
Then place a thin layer of the grease on the mica insulator. Plug the
transistor into the socket and replace the two mounting screws. The small tube that
radio shack sells is more than enough for mounting the four transistors.
Be extremely careful in handling the mica insulators.
Radio shack also sells the transistor mounting kits for the pass
transistors that contain the mica insulator just incase you break one. I don't
remember if they sell just the mica insulators by themselves.
Get another ham friend who lives nearby and knows how to check the
transistors to help you.
Good luck and 73 .
Mike Tyler. K6STU
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