[ICOM] IC-756PROIII No Transmit

[Kenneth Nilsson]

Hello Phil!
I have had the same problem with my PRO III several times.
The explanation I have got is that thunder and lightning, even far away, can
cause this problem.
Nowadays I always pull of my antenna cable fraom the rig when I leave the
schack. I hope this will help.
73 de Ken / SM7CQY


Den 09-06-19 03.02, skrev "Phil Krichbaum" <vailphil at sopris.net>:

>     I have a  PROIII purchased in August 2007. The first hour I used it
> the xmit went to super QRP after two QSOs on 20 CW at 5w and one at
> 100w. I sent it to Icom and they charged me over $250 to fix the problem
> claiming I operated it out of warranty! I have no idea where they got
> that idea but I did manage to get a refund but still was out the
> shipping both ways. I was using it into a 20 m antenna with nice low SWR
> and had not had time to hook up the amp or RX antennas before it went
> toes up! The next three times it died the same death I sent it to
> Midwest Technical Service for Tim Moes to work on it as I was
> unimpressed with the attitude at Icom!  It has now died the same death
> on transmit a 5th time less than two months after the last repair. It is
> not the drivers or finals, but fets and diodes, mostly stuff in the
> tuner. I'm told it is RF getting back in to it. I do have beverage
> receive antennas but do not bring them in thru the RX antenna jacks, I
> use one of KD9SV's DXpedition II boxes with a 160/80 preamp, 4 positions
> of RX antenna switching and the RX antennas come in thru one of the
> SO239 antenna plugs when not in xmit.
>     I'm seriously convinced I got a lemon from the start. I really like
> the performance when it works right but I can't continue to go on like
> this. I wonder if they fixed these problems in the 7600? It seems that
> this is not a real common problem but the two of us are not the lone
> ranger either. Does Icom have a policy for dealing with lemons? I'm fed up!
>     73 Phil N0KE
> 
> k0bx at arrl.net wrote:
>> Larry, thank you for your comments.  I do agree with what you said.
>> 
>> But in my case, I do not have any other antenna connected.  The 1st time was
>> on 20 CW using my Hygain 204BA 4 element monobander with no amp.  I agree
>> that some RF must be getting back to the rig somehow, but I do have grounding
>> devices on all my antennas.
>> 
>> The 2nd time, I just (Like the other guy) just turned on the rig to find it
>> dead on transmit.  I know that sounds like an e-bay thing, "It worked the
>> last time I used it".
>> 
>> One of the gentlemen in my DX Club got rig of his PROIII after 3 repairs for
>> the samething.
>> 
>> I have used a TS-850S on this antenna for 12 years and when taken out of
>> service it performed on transmit like the day it was brought.  My IC-706MK2G
>> have been on this antenna for the last 5 years.  No problems with them.
>> 
>> As far as the Burghardt BEV-756, Burghardt recommended it as a solution to my
>> problem even though I do not use a Bev Antenna.
>> 
>> It seems that others are having the same problem and only using one antenna
>> at a time.
>> 
>> Joe K0BX
>> 
>> 
>> Stop the insanity!
>> Please do not add me to any distribution lists (Joke, Stories or Junk)
>> without my permission.
>> 
>> 
>> --- On Tue, 3/24/09, Lawrence Young <k4lxv at bellsouth.net> wrote:
>> 
>>   
>>> From: Lawrence Young <k4lxv at bellsouth.net>
>>> Subject: Re: [ICOM] IC-756PROIII No Transmit
>>> To: "ICOM Reflector" <icom at mailman.qth.net>
>>> Date: Tuesday, March 24, 2009, 9:03 AM
>>> Guys: Products like the Burghardt BEV-756 are designed to
>>> serve as a front end saver for those hams who may not
>>> understand that one cannot safely transmit on one antenna
>>> and leave another one such as a Beverage receive antenna
>>> still connected to the receiver. I am amazed at the number
>>> of hams that I know who may do this without realizing the
>>> possibility of damage to the radio.
>>> Larry K4LXV
>>> 
>>>     
>> 
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>>   
> ----
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