[TenTec] Orion RF issue

[dw]

I agree totally.
My brother used to repair drilled well pump systems.
There was a certain farmer who had a drilled well in the middle of a
large pasture for watering his cows.
That well-head gets banged with lightning 2 or 3 times per summer.
One day, my brother was just finishing up there when a storm came up
real fast.
The well head got struck and it poped the bolted top off, making water
gush up 20 feet!
Thats a LOT of waivos!!  :)
In the summer I unplug my stuff when not at home also.

Duane
N1BBR

On Fri, 26 Jan 2007 11:38:57 -0500, "Carl Moreschi" <n4py at arrl.net>
said:
> You definitely should not have your tower ground and house ground tied
> together.  Even a nearby lightning strike can cause the two grounds to
> develop very large voltage differences.  Having these tied together is
> setup
> for a disaster.  During lightning season, anytime my shack is not in use,
> I
> disconnect everything to the shack including all grounding.  This
> guarantees
> my shack is isolated from a nearby lightning strike.
> 
> Carl Moreschi N4PY
> 121 Little Bell Drive
> Bell Mountain
> Hays, NC 28635
> ----- Original Message ----- 
> From: "Larry Menzel" <retire at means.net>
> To: "'Discussion of Ten-Tec Equipment'" <tentec at contesting.com>
> Sent: Friday, January 26, 2007 11:26 AM
> Subject: Re: [TenTec] Orion RF issue
> 
> 
> I agree with others on this, it seems that the only time I suffered from
> this was with very high swr, significant voltage drop, or the wrong
> antenna.
> 
> The Orion must have a solid 25 amp supply, so if it's only say an Astron
> RM25 you need to make sure that the radio is the only thing on that
> supply.
> An RS or RM 35 is a better bet, yet.
> 
> I guess that would be my recommendation, as well, but I'm curious about
> your
> tying your shack ground to the tower ground;  I remember well, many
> sources
> stating that under no circumstances should the two be connected.
> 
> Anyone else have an opinion on this?
> 
> It would seem foolhardy to me to do so, as a strike on the tower would be
> instantly transmitted to the station grounds and could cause significant
> damage...assuming of course that all other precautions had been taken,
> unplugging equipment, etc., but I never unhook my ground system on my
> shack.
> 
> Curious.
> 
> Larry, N0XB
> 
> 
> -----Original Message-----
> From: tentec-bounces at contesting.com
> [mailto:tentec-bounces at contesting.com]
> On Behalf Of Natan Huffman
> Sent: Friday, January 26, 2007 10:16 AM
> To: tentec at contesting.com
> Subject: [TenTec] Orion RF issue
> 
> Ladies and Gentlemen,
> 
> 
> 
> Today I took delivery of an Orion with version 2.056 firmware and
> integrated, with great ease, the rig into the station.  Unfortunately I
> am
> having an issue while on 80 meters where my antenna is near the shack and
> only up 50 feet.  The station is grounded well as is the house with each
> having two 15' ground rods and short ground wires < ¼ lamda at 80) . 
> These
> grounds are tied into 4 more at the base of the tower about 50' away from
> the shack.  I doubt the problem (white screen when transmitting) is due
> to
> lack of grounding but rather the presence of a strong RF field generated
> by
> the 80 antenna. Just for fun (done in 4 degree wx) I disconnected the
> large
> bus to the tower base and no change.  I also checked VDC at the plug in
> the
> back providing power and it's fine.
> 
> 
> 
> This problem is not seen on two other transceivers in the shack when used
> on
> 80, which also suggests the problem is RF from the antenna.  Might there
> be
> some remedy so that I don't have a white screen when transmitting?
> 
> 
> 
> Thanks in advance,
> 
> 
> 
> Natan W6XR
> 
> 
> 
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-- 
  dw
  dw at sover.net