[Antennas] Re: [Icom] Links to icom Service Bulletin 920

Sat, 20 Dec 2003 10:17:53 -0800

This is an interesting point.  Something you SHOULD do but may forget
to do.  Does anyone know of any antenna switching device that
automatically grounds the antenna when you shut off power to the ant
switching unit?  I use a Master Power switch in my shack that controls
power to various HF and VHF power supplies, the station monitor,
various wall warts for TNC's, etc.  I could connect an antenna
switching device to this Master Power switch and then when I shut down
the ham shack the antenna would automatically go to ground.
73 & MC

[email protected] wrote:
> 
> I have many friends who don't ground the antenna when not in use which is
> very puzzling to me. In my setup, it is one turn of the antenna switch. When
> I know storm activity is about, I disconnect the antenna completely. Is this
> overkill?
> 
> Andy K5VM
> 
> ----- Original Message -----
> From: "Jens Schmidt" <[email protected]>
> To: <[email protected]>
> Sent: Saturday, December 20, 2003 12:59 AM
> Subject: Re: [Icom] Links to icom Service Bulletin 920
> 
> | Hi George,
> | and Adam, excellent work.
> |
> | DC-grounded antennas are also the easiest place to start protecting
> | your receive input devices.
> |
> | Merry Christmas and a Happy New Year / best season wishes
> |
> | 73 Jens    ZL2TJT
> |
> | "George, W5YR" wrote:
> |
> | > Interesting that the VHF receive line is already protected by
> back-to-back
> | > diodes as per the Service Bulletin. Guess Icom felt that the HF line was
> not
> | > as vulnerable to static discharge.
> | >
> | > I keep all my antenna inputs grounded when the station is not in use,
> but
> | > when one uses the 746PRO there is a risk. Perhaps using external static
> | > bleed methods would be a good idea or d-c grounded antenna feeds.
> | >
> | > 73, George W5YR
> | > [email protected]
> | >
> | > ----- Original Message -----
> | > From: "Adam Farson" <[email protected]>
> | > To: "Icom Reflector" <[email protected]>
> | > Cc: "Dick Flanagan" <[email protected]>; "IC-746 Reflector"
> | > <[email protected]>; <[email protected]>
> | > Sent: Friday, December 19, 2003 9:56 PM
> | > Subject: [Icom] Links to icom Service Bulletin 920
> | >
> | > > Hi Dick,
> | > >
> | > > Service Bulletin #920, describing the IC-746Pro/IC-7400 transmitter
> | > failure
> | > > fix, is now downloadable in PDF format on the Icom FAQ homepage, with
> a
> | > > mirror on my Icom page.
> | > >
> | > > Here are the links:
> | > >
> | > > http://www.qsl.net/icom/
> | > >
> | > > http://www.qsl.net/ab4oj/icom/icom.html
> | > >
> | > > Best 73,
> | > > Adam, VA7OJ/AB4OJ
> | > > North Vancouver, BC, Canada
> | > > http://www.qsl.net/ab4oj/
> | > > Icom FAQ site:
> | > > http://www.qsl.net/icom/
> | > >

-- 
__________________________________________________________________________                       
                                     Alan Zack
                     Amateur Radio Station K7ACZ
                         Las Vegas, Nevada, USA
          Quality Engineer, The Boeing Company, Retired
  Aviation Chief Warrant Officer, U.S. Coast Guard, Retired
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