[ICOM] Oh NO!!!!

[KK2DOG in NY]

Interesting thread. Living here in northern New York, we have some very wicked lightning especially during the summer months and yet I have never been zapped. Most of the time, I simply disconnect my coax, and so far so good. I did see a tall oak tree about 1/4 mile away get blown to bits by lightning, but no problems here in the shack. I have an insurance policy just in case.

  Mike
  KK2DOG
  Owner/Admin 
  www.hamwave.com


> Date: Thu, 19 Apr 2012 21:08:04 -0400
> From: kzerosd at gmail.com
> To: icom at mailman.qth.net
> Subject: Re: [ICOM] Oh NO!!!!
> 
> Ron,
>    The 756Pro has a real bad habit of trashing the pair of driver
> transistors in this situation.  The strike can be over a mile away,
> but damage the drivers, and take them out.   I always disconnet at all
> lines when not on the air, but an Icom note I have claims the damage
> can be done while just listening, with the strike a mile and a half
> away.   Reason I'm familiar with it, I had to replace the drivers in
> my 756Pro over this issue.   It also took one of the chip resistors in
> the driver circuit.   Not hard to do, but a known problem.   Got a
> pair of drivers on Ebay, from Honk Kong, back then they were very
> readily available, less than $20 to my door shipped.
> 
> 73's de Stephen, K0SD
> 
> **************************************************
> 
> On Thu, Apr 19, 2012 at 2:22 PM,  <bonddaleena at aol.com> wrote:
> >
> > Hi. I've been a reader of this site for quite some time. Last summer, I took a 'close by' lightning hit. Flash and noise at same instant. I went into the house and found a bunch of stuff damaged. I suspect it hit a nearby AC line due to the following:
> > It took out both of my rotor control boxes, Astron 50 Amp supply, TV, my 70 cm preamp, on a different tower, etc.
> > I checked my favorite radio, my 756PRO, that I hand carried back from Tokyo when they first came out. It is connected to a PS-55 which is plugged into a large surge protector. Seemed OK.
> > Yesterday, I went to call someone on 6M and noticed NO output. The receiver is fine.
> >
> > ALL antennas were disconnected as usual, when not in use and the coax pigtails were grounded. (I use hardline for most of my antennas}
> >
> > - no output on any band
> > - ant OK
> > - tried dummy load
> > - used several different wattmeters
> > - 'scope shows normal voice patterns
> > - Po, SWR, etc non functional
> > - tried master reset. no good.
> >
> > So, before I take a peak inside, any suggestions? I'd like to fix it myself, if possible.
> >
> > This is strange because my mint 745 next to it did the same thing a few years ago. I haven't bothered to even look at the 745 because the receiver is also fine. I use it with receiving converters.
> >
> > Thank you!!!
> >
> > ron
> > N4UE
> > ----
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> ----
> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
> Icom FAQ: http://www.qsl.net/icom/
> To support QSL/QTH.net: http://www.qsl.net/donate.html