[Elecraft] K2 control board D10 and D12?

Mon Apr 14 22:47:01 2003

I don't know if you damaged them but I would note that checking diodes
in circuit is sometimes very misleading.  Depending on what else is in
the circuit (capacitors, other diodes, etc.) you can get misleading
readings.  You could lift one end of each diode from the board and check
them.  But that would involve even more heating, etc.  Frankly, I would
simply note the concern and move on.  Eventually you will come to the
resistance and other checks in the build process.  If those tests check
out OK, I wouldn't worry.  If they don't, you have one source to check
(among others) and perhaps that would be a good time to lift one end of
each diode and check.  Of course, I would be a bit more careful in
future soldering.  It really shouldn't take all that long to solder the
leads compared to other things in the kit.

Bruce - W8FU

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of C T Morton
Sent: Saturday, April 12, 2003 7:54 AM
To: Elecraft
Subject: [Elecraft] K2 control board D10 and D12?

Hello,
Installed D10 and D12 on control panel. Seemed to take inordinate amount
of
time to solder thick leads to board. Wonder if I somehow damaged the
diodes...used diode checker to test components (Extech MultiTec 310)
Readings on D10: .69, reversed the leads get .03-resistance shows 155
ohms
Readings on D12: .02, reversed the leads get .148-resistance shows 135K
ohms
Wonder if I "cooked" the diodes?
Help!!
Tnx
Tom
P.S. Using Hakko 936 iron at 750 degrees with clean shiny tip...