If you have a problem with a ground due to terrain issues, you might want to
look into using Lyncole grounding rods. These are hollow copper tubes with
a chemical crystal compound inside. The rod has some tapes around breather
holes which you remove prior to burying in betonite clay etc.. The
Tim tahr...@swtexas.net wrote:
This has been a very interesting thread to watch, and most of the
installations that I've done have been 'add-ons' to existing well
designed systems.
On a different note, I'm now working on a solar powered system,
and was wondering about the grounding
I don't think that you have necessarily wasted your time, but you have
severely limited your chances of decreasing lightning damage. It's like
replacing 3 tires on your car that has 4 bad tires, you've bettered your
odds but it is not the best fix.
I have a site that the owner would throw me
-Builder@yahoogroups.com
Sent: Wednesday, August 18, 2010 8:34 AM
Subject: Re: [Repeater-Builder] Polyphaser Question
I don't think that you have necessarily wasted your time, but you have
severely limited your chances of decreasing lightning damage. It's like
replacing 3 tires on your car that has 4
, 2010 8:34 AM
Subject: Re: [Repeater-Builder] Polyphaser Question
I don't think that you have necessarily wasted your time, but you have
severely limited your chances of decreasing lightning damage. It's like
replacing 3 tires on your car that has 4 bad tires, you've bettered your
odds
condom has a hole in it ;-)
Chuck
WB2EDV
- Original Message -
From: Joe k1ike_m...@snet.net
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, August 18, 2010 8:34 AM
Subject: Re: [Repeater-Builder] Polyphaser Question
I don't think that you have necessarily wasted your time
On 8/17/2010 11:55 PM, Ray Brown wrote:
What do you do when you want to install a small UHF linking repeater on
a 4-story building that has no lightning protection on its' roof? (this is to
link an ambulance at a hospital to its' base repeater 40 miles away)
From what I've heard, it may
Remember the objective is not to take the brunt of a lightning strike,
but to drain off any static that would attract that strike. Lightning is
just a spark looking to close the gap, and if your antenna is closer to
DC ground, it will find something closer to its potential (i.e. static
-Builder@yahoogroups.com
Sent: Wednesday, August 18, 2010 9:26 AM
Subject: Re: [Repeater-Builder] Polyphaser Question
Better than a fraction of a percent protection. I've lost a couple of
polyphasors in the years, but never had lightning damage. I'm a
realist, everything isn't perfect all
: Tuesday, August 17, 2010 8:55 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Polyphaser Question
What do you do when you want to install a small UHF linking repeater on
a 4-story building that has no lightning protection on its roof? (this is to
link an ambulance
.
From: Eric Lemmonwb6...@verizon.net
To: Repeater-Builder@yahoogroups.com
Sent: Tue, August 17, 2010 11:30:03 PM
Subject: RE: [Repeater-Builder] Polyphaser Question
Ray,
I suggest that you obtain the most recent edition (2011) of NFPA 780, the
Standard
You might like to look at the latest Motorola R56 Installation standards
manual. It's very comprehensive. Has good section on grounding and
protective devices.
Yes, a good grounding system and a full lightning and surge protection of an
RF site doesn't come cheap. But if you live in Florida the
] On Behalf Of Tony KT9AC
Sent: Wednesday, August 18, 2010 9:25 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Polyphaser Question
Remember the objective is not to take the brunt of a lightning strike, but
to drain off any static that would attract that strike
And to not create (or leave) a path for current flow to destroy equipment.
Chuck
WB2EDV
- Original Message -
From: Gary Schafer
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, August 18, 2010 8:39 PM
Subject: RE: [Repeater-Builder] Polyphaser Question
Here
*To:* Repeater-Builder@yahoogroups.com
*Subject:* Re: [Repeater-Builder] Polyphaser Question
Remember the objective is not to take the brunt of a lightning strike, but
to drain off any static that would attract that strike. Lightning is just a
spark looking to close the gap, and if your antenna
Michael Ryan mryan...@tampabay.rr.com wrote:
I notice when looking at the Polyphaser website, there are a wide range of
products, even a wide variety of items that on the surface appear to be
suited to my particular needs. I want to put a Polyphaser on my 220
repeater. There are
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of n5sx...@charter.net
Sent: Wednesday, August 18, 2010 11:19 PM
To: Repeater-Builder@yahoogroups.com
Cc: Michael Ryan
Subject: Re: [Repeater-Builder] Polyphaser Question
Michael Ryan mryan
This has been a very interesting thread to watch, and most of the
installations that I've done have been 'add-ons' to existing well
designed systems.
On a different note, I'm now working on a solar powered system,
and was wondering about the grounding there. Everything will
be mounted on a
I notice when looking at the Polyphaser website, there are a wide range of
products, even a wide variety of items that on the surface appear to be
suited to my particular needs. I want to put a Polyphaser on my 220
repeater. There are DC blocked and unblocked. I don't suppose it matters in
Hi Michael,
Probably for 220MHZ choose between VHF50HN-ME for high powered TX or
multiple TX'sand a IS-B50LN-C0-MA is for a single normal power TX.
These have the N connectors sexed as you want.Check the power rating of
each device at your frequency.
Peter
On Tue, Aug 17, 2010
: Re: [Repeater-Builder] Polyphaser Question
Hi Michael,
Probably for 220MHZ choose between VHF50HN-ME for high powered TX or
multiple TX'sand a IS-B50LN-C0-MA is for a single normal power TX.
These have the N connectors sexed as you want.Check the power rating of
each device
If you are buying used, buyer beware. They could be shot.
Chuck
WB2EDV
- Original Message -
From: Michael Ryan
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, August 17, 2010 11:12 AM
Subject: RE: [Repeater-Builder] Polyphaser Question
Thanks a lot.I see them
: [Repeater-Builder] Polyphaser Question
Thanks a lot.I see them on QTH.com for sale once in a while. I just posted
an ad looking for one. '73, Mike
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of petedcur...@gmail.com
Sent: Tuesday, August 17, 2010 11:03
, August 17, 2010 3:02 PM
Subject: RE: [Repeater-Builder] Polyphaser Question
Chuck, Thanks for that.wouldn't still pass RF if they are blown will they? -
m
if they are blown will
they? - m
*From:* Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] *On Behalf Of *Chuck Kelsey
*Sent:* Tuesday, August 17, 2010 11:51 AM
*To:* Repeater-Builder@yahoogroups.com
*Subject:* Re: [Repeater-Builder] Polyphaser Question
If you
@yahoogroups.com
Subject: Re: [Repeater-Builder] Polyphaser Question
Polyphasers have a shunt protection element. It usually fails and becomes
leaky so you get a loss/VSWR indication. It can fail open or short. If
it's open, there is nothing to detect.
Wasn't there a capacitor too? Seems like there was in one I saw open.
Chuck
WB2EDV
- Original Message -
From: David Jordan
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, August 17, 2010 4:44 PM
Subject: RE: [Repeater-Builder] Polyphaser Question
I recently opened
*From:* Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] *On Behalf Of *Oz-in-DFW
*Sent:* Tuesday, August 17, 2010 4:37 PM
*To:* Repeater-Builder@yahoogroups.com
*Subject:* Re: [Repeater-Builder] Polyphaser
The units are probably different depending on whether they are HF, VHF, UHF, or
2.4Ghz, etc.
- Original Message -
From: Chuck Kelsey
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, August 17, 2010 4:58 PM
Subject: Re: [Repeater-Builder] Polyphaser Question
: [Repeater-Builder] Polyphaser Question
Wasn't there a capacitor too? Seems like there was in one I saw open.
Chuck
WB2EDV
- Original Message -
*From:* David Jordan mailto:wa3...@comcast.net
*To:* Repeater-Builder@yahoogroups.com
this connection.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Michael Ryan
Sent: Monday, August 16, 2010 11:51 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Polyphaser Question
this
connection.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Michael Ryan
Sent: Monday, August 16, 2010 11:51 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Polyphaser
Huber and Suhner, I think is who you mean... GOOD stuff, but you pay for it.
Headquartered in Switzerland.
http://www.hubersuhner.com/products/hs-p-rf/hs-rf-lightning-protectors.htm
Mark - N9WYS
-Original Message-
From: Repeater-Builder@yahoogroups.com On Behalf Of STeve Andre'
This
in
to a ground system is necessary. Leave one unprotected path available and
you've wasted your time.
Chuck
WB2EDV
- Original Message -
From: Eric Lemmon wb6...@verizon.net
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, August 17, 2010 9:53 PM
Subject: RE: [Repeater-Builder] Polyphaser
: RE: [Repeater-Builder] Polyphaser Question
I recently opened up a Polyphaser unit we used on one of our remote sites.
it covered both 2m and 70cm. We were experiencing poor receive at the site.
Replaced the unit and receiver sensitivity is once again hot. Anyone want
pics of the insides
: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of STeve Andre'
Sent: Tuesday, August 17, 2010 7:53 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Polyphaser Question
This has been a great discussion. Eric, from the reading I've
What do you do when you want to install a small UHF linking repeater on
a 4-story building that has no lightning protection on its' roof? (this is to
link an ambulance at a hospital to its' base repeater 40 miles away)
From what I've heard, it may not be a good idea to hook it to the HVAC,
: Tuesday, August 17, 2010 8:55 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Polyphaser Question
What do you do when you want to install a small UHF linking repeater on
a 4-story building that has no lightning protection on its roof? (this is to
link an ambulance
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