[ICOM] Oh NO!!!!

Wed Apr 25 17:31:32 EDT 2012

     It sure seems a rig in this price range should have a reasonable 
method of protection from ESD. Some of the old tube rigs had a neon 
bulb across the RX antenna terminal to ground to bleed off the ESD.
     Phil N0KE

On 4/25/2012 10:08 AM, Stephen Budensiek wrote:
> Phil,
>     I can't answer for the newer rigs.  But it is there in all flavors
> of the 756, ie the original 756, the Pro, the Pro2, and the Pro3.
> Someone commented it was also present in the 746 (I've never owned
> one).  Also can't tell you about the newer rigs.  I find it
> interesting as a engineering tech that it avoids the finals (should be
> first thing in the chain from the antenna port on the tx side, and
> goes to the drivers).  Not sure how that is done.
>
> 73's de Stephen, K0SD
>
> ***************************************
>
> On Wed, Apr 25, 2012 at 11:27 AM, Phil Krichbaum<vailphil at sopris.net>  wrote:
>>      I'm not sure if you mean 756 PRO, PRO II or PROIII. I know from
>> first hand experience that the PRO II and PROIII suffer this problem
>> too easily (IMHO) from ESD (electrostatic discharge). I had a new in
>> the box PRO III and in the first hour after I took it out of the box
>> during which I made two QRP QSOS and one at 100w, the TX power went to
>> almost zero. At the time there was not one cloud in the sky, no wind
>> etc. The failure was some FETs and diodes in the tuner and it was only
>> after a few phone calls Icom agreed to cover the repair under
>> warranty! My antennas have less than 2:1 SWR.
>>      Another time I had a close lightening strike and my PROII was not
>> connected to an antenna and was off. It was off as was the Icom PS it
>> was connected to but it was plugged into the AC mains. The PROII was
>> totaled but I still use the same PS years later and it had no
>> problems. Several other items were damaged/destroyed (TV, answering
>> machine, computer, well pump relay) and it seems the damage came in
>> the neutral side of the AC 117 line. I've since had the power company
>> install a "meter treaters" on my electric meters and I've had no
>> further problems even after a direct hit on the over head feed to the
>> house last summer but your results may vary. I'm not then lone ranger
>> with this type of Icom 756 problems and have no clue if it has been
>> taken care of with the newer Icom rigs.
>>      Phil N0KE
>>
>>
>>
>>
>> 4/19/2012 12:22 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
>>> ----
>>> 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
>>>
>>>
>>> -----
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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
> ----
> 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
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2012.0.2126 / Virus Database: 2411/4958 - Release Date: 04/25/12
>
>
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