There was a problem. I don't know by what serial number it was fixed. My
2nd PROII never had the problem, and neither did the rerplacement for
the bad one. A query on the ICOM reflector would probably get you some
more info.
Take a look here:
http://www.ham.dmz.ro/icom/ic-756proii-oscillation-problem.php
73, Mike NF4L
larryjspammenot@teleport.com wrote:
> I just picked up an ICOM IC-756PRO II at a local estate sale. Is there some
> potential 6-Meter problem I should be aware of?
>
> LJ
>
> -----Original Message-----
>
>> From: Mike <nf4l@nf4l.com>
>> Sent: Apr 27, 2009 5:36 AM
>> To: Scott MacKenzie <kb0fhp@comcast.net>
>> Cc: towertalk@contesting.com
>> Subject: Re: [TowerTalk] 6M Beam being weird
>>
>> Scott MacKenzie wrote:
>>
>>> All:
>>>
>>> I have a 6M beam that is showing high SWR (10:1). I checked each connector
>>> to the antenna by disconnecting and placing a dummy load. Finally up at the
>>> antenna, I disconnected the antenna, and placed the dummy load as the
>>> antenna. Readings were 1:1 SWR. I then clean up the connector at the
>>> antenna, and retest. SWR is still high.
>>>
>>> I then pull down the antenna (K1FO or similar - not M2) and check it out.
>>>
>>> With the coax disconnected, I check the connector - good continuity from the
>>> center pin to the otherside of the connector (where the gamma match is
>>> attached.
>>>
>>> I check from center pin to ground on the conductor to see if shorted -
>>> Circuit is open.
>>>
>>> I check to make sure I have continuity between outside of gamma and rest of
>>> antenna. Circuit is fine - and shows continuity.
>>>
>>> The only thing I can think of left is to replace the coax less shield inside
>>> the gamma.
>>>
>>> What else can it be?
>>>
>>> I was hoping to get this up higher in the air for the summer Es season.
>>>
>>> Thanks
>>>
>>> Scott
>>> _______________________________________________
>>>
>> The rig isn't an ICOM ProII is it? I had a brand new one that had the 6M
>> problem(un-beknownst to me), and I was assembling a new antenna, It
>> exhibited a very high SWR.
>> 73, Mike NF4L
>>
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