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[Towertalk] Supressors that pass DC control V.

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Subject: [Towertalk] Supressors that pass DC control V.
From: (Jon Ogden)
Date: Sat, 28 Sep 2002 08:12:45 -0500
I was thinking about this again this morning while laying in bed waking up
(no idea why - I guess I just have a twisted mind!).

The original poster wanted a suppressor that would pass DC through the
center conductor.  You say that Polyphaser has done this.  That may be true,
but there's another problem.  In virtually all suppressors, the center
conductor is somehow DC connected to ground as well.  Therefore, even if you
find a suppressor that is DC coupled, you still can't pass DC on it!  The
only thing that would work is just a straight gas discharge tube to ground.
But then you don't get any of the beneficial benefit of draining static off
the center conductor, etc.  So putting a bias tee on the antenna side of the
suppressor is really the way to go here, IMHO.

Secondly, about Smiths buying PolyPhaser and un-ham-friendly rules - that's
too bad.  I must say that Smiths does do a pretty decent job though of
leaving companies they buy alone for the most part.  I currently sell for
two Smiths owned companies that sell RF related stuff.  While there were
changes, I am genuinely surprised at how transparent things have continued
to run.  For a "large" company, they do a pretty good job.



on 9/27/02 8:07 PM, Bob Wanderer at wrote:

> PolyPhaser does.  It is a non-catalog item or "special."  I
> don't know if Poly does specials anymore.  I created several
> of these specials in, I think, 1996 or 1997.  The part
> number, therefore would be 96(7)-xxxxA-(letter).  The xxxx
> would be a month-day numeric.  As an example, if the
> paperwork got approved on November 4, 1997 and it was the
> first one I did that day, the part number would be
> 97-1104A-A (if it were the second the last character would
> be a B and so on and so forth).  See if you can get ahold of
> either Tricia Eaton or Pat Heeren.  They were around in the
> good ole days (before Roger sold Poly to Smiths Industries
> who instituted some ham-UNfriendly rules) and I think
> they're still there.  If you do get one of them, tell them I
> suggested contacting them and you need one of the ham radio
> specials I created.

Jon Ogden
NA9D (ex: KE9NA)

Life Member: ARRL, NRA
Member:  AMSAT, DXCC

"A life lived in fear is a life half lived."

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