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
Nate,
My sincerest thoughts are with you in this time.
Don, KD9PT
- Original Message -
From: Nate Duehr
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, August 17, 2010 12:46 AM
Subject: Re: Properly designed PAs (was: Re: [Repeater-Builder] Coax length,
etc.)
firstly, i guess a lot comes down to your wallet
i would if i was going to make a small time PRS repeater, prefer to use
maybe a couple of Tait 2020's and ( Duplexor versus twin aerials )
tin shed up on the hill out back versus a 40meter high ( Or more ) tower
don't get me wrong t555 are the old
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
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Nate,
Please accept my sympathies and condolences to you and your family. I agree
with you on the time aspect entirely.
With Prayers -
John Hymes
La Rue Communications
10 S. Aurora Street
Stockton, CA 95202
http://tinyurl.com/2dtngmn
- Original Message -
From: Nate Duehr
To:
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Usually, from any reports I've seen, they can exhibit higher than normal VSWR
and/or loss if they've seen better days. So, yes, they could still pass RF and
not be good.
Chuck
WB2EDV
- Original Message -
From: Michael Ryan
To: Repeater-Builder@yahoogroups.com
Sent:
The manuals have been spoken for.
Jamey Wright
WR4JW
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Jamey Wright
Sent: Monday, August 16, 2010 7:16 PM
To: 'Repeater-Builder@yahoogroups.com'
Subject: [Repeater-Builder] Motorola Manuals
I have
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.
On 8/17/2010 2:02 PM, Michael Ryan wrote:
Chuck, Thanks for that...wouldn't still pass RF if they are
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 respond direct and I'll ship you the photos.not
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
Upload the pics to the group PHOTOS section. Always nice to have stuff
like that available for reference.
Joe M.
David Jordan wrote:
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.
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
Yup, huge variation by application. Some gas tubes, some MOVs, some
resonant stuff.
This stuff has a finite life. They have some pretty information on
their site:
http://www.protectiongroup.com/knowledgebase
On 8/17/2010 7:14 PM, WA3GIN wrote:
The units are probably different depending
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
Hello group
We are still looking for a 4 channel combiner VHF - 125 w per channel -
prefer Cellwave or similar.
Also need a 8 channel reciever multicoupler ( amp + PS etc. )
We buy or trade
TNX
Ed
K9QPJ
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
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
Mike,
Mobiles by their nature don't make good Repeaters, They are usually low duty
cycle, so need to be set for lower power or force cooled. Something like the
T555 is 25Watts but at 33% duty cycle, that is 1 minute TX and 2 minutes RX.
The hole in the back suggest sonething connected, but
Actually Eric brings up the more important aspect of lightning protection.
Simply installing a PolyPhaser on your antenna line won't cut it. A
single-point grounding panel where your transmission lines, power,
telephone, etc. are all run through protective devices and then are tied in
to a
Can I have a copy of the photo, it's nice to learn something from it.
73
W4CSO Camilo
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of David Jordan
Sent: Tuesday, August 17, 2010 4:45 PM
To: Repeater-Builder@yahoogroups.com
Subject:
Steve,
PolyPhasers are popular with Hams and commercial users with tight budgets,
but they are the economy line as lightning and surge protectors go. Most
cellular systems and professional installers prefer to use Huber + Suhner
protectors, which cost two or three times what a PolyPhaser costs.
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,
Ray,
I suggest that you obtain the most recent edition (2011) of NFPA 780, the
Standard for the Installation of Lightning Protection Systems, and install a
proper lightning protection system for your antenna and mast per that
document. It can be purchased for about $40, but you might find a copy
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