[ICOM] Re IC765 No Transmit

[George, W5YR]

Q14 in the 765 is prone to failure due to timing problems in the T/R
switching. I lost mine about three times before I got all the mods from Icom
to correct the problem. There are several parts changes to be made - Icom
should be able to steer you to the mods that have to be made.

In the meantime, a 2N2222 or even a 2N3904 will function in the Q14 slot and
seems to operate with no problems. I used a 3904 for several months while
waiting for Icom to get the proper transistor in stock.

Perhaps Gary Fiber can leap in here with more information.

73, George W5YR
Fairview, TX
w5yr at att.net
http://www.w5yr.com


----- Original Message ----- 
From: "Graham Shortreed" <gshortre at telus.net>
To: <icom at mailman.qth.net>
Sent: Saturday, July 31, 2004 6:08 PM
Subject: [ICOM] Re IC765 No Transmit


I've had the exact same problem twice with my 765.  I thought I'd wait until
I heard from the tech at ICOM Canada before I made this post.
In both cases, the rig just quit transmitting(all modes) but the receive was
normal. The last time it happened, I was in the middle of a QSO, when the
power in the neighborhood had a momentary drop, and then came back up.

Well, here is the answer (in my case anyway).  Q14 on the RF board was shot.
No apparent reason, but the tech suggested perhaps the power surge may have
been the cause, or perhaps a static discharge from somewhere.  My rig(s) are
well grounded, and my FT1K has never suffered this problem.

Doug (KF8VS), I don't know if you've solved your 765 problem yet or not, but
mine was Q14.

73..
Graham VE7ABC/VA7TT
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