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 at
bject: 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
e
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 on
gust 17, 2010 11:03 AM
To: Repeater-Builder
Subject: 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 connect
t: Tuesday, 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
ill pass RF 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
> *Subjec
ilder@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 o
7, 2010 4:37 PM
> *To:* Repeater-Builder@yahoogroups.com
> *Subject:* Re: [Repeater-Builder] Polyphaser Question
>
>
>
> Polyphasers have a shunt protection element. It usually fails and
> becomes leaky so you get a l
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
*Sent:* Tuesday, August 17, 2010 4:58 PM
> *Subject:* Re: [Repeater-Builder] Polyphaser Question
>
>
>
> Wasn't there a capacitor too? Seems like there was in one I saw open.
>
> Chuck
> WB2EDV
>
>
> - Original Messag
Mike,
Perhaps the best course is to choose the unit with the highest Joule rating
that meets your power level and frequency ratings. Do not buy a DC-blocked
unit if you don't need that feature, because the capacitor is usually the
first component to fail. Do not buy a used unit, because it was p
This has been a great discussion. Eric, from the reading I've done it
didn't seem to me that the Polyphasers were the best out there, but
a European company whose initials were S + H, I think. Care to
comment on the best ones, in your opinion?
On Tuesday 17 August 2010 21:53:30 Eric Lemmon wrote
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 ha
to a ground "system" is necessary. Leave one unprotected path available and
you've wasted your time.
Chuck
WB2EDV
- Original Message -
From: "Eric Lemmon"
To:
Sent: Tuesday, August 17, 2010 9:53 PM
Subject: RE: [Repeater-Builder] Polyphaser Question
> Mike,
bject: 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 in
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Polyphaser Question
This has been a great discussion. Eric, from the reading I've done it
didn't seem to me that the Polyphasers were the best out there, but
a European company whose initials were S + H, I think.
eater-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 done it
didn't seem to me that the Polyphaser
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,
eit
: 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 at a
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 o
sday, 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 bad tires,
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
>> r
on at all. Your condom has a hole in it ;-)
Chuck
WB2EDV
- Original Message -
From: "Joe"
To:
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
&
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
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
charged)
rom: "Joe"
To:
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 of the time.
>
> 73, Joe, K1ike
>
>
The building has a steel support structure, I'm sure. You will need to bond to
that as a start.
Bill
From: Eric Lemmon
To: Repeater-Builder@yahoogroups.com
Sent: Tue, August 17, 2010 11:30:03 PM
Subject: RE: [Repeater-Builder] Polyphaser Question
Ra
l under the clamp.
>
>
>
> From: Eric Lemmon
> 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
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 l
] 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 is a
>
> *From:* Repeater-Builder@yahoogroups.com [mailto:
> repeater-buil...@yahoogroups.com] *On Behalf Of *Tony KT9AC
> *Sent:* Wednesday, August 18, 2010 9:25 AM
>
> *To:* Repeater-Builder@yahoogroups.com
> *Subject:* Re: [Repeater-Builder] Polyphaser Ques
Michael Ryan 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 DC blocked and unblo
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
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 single
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 to
Tim 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 there. Everyth
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