Just replaced a damaged mast for our VHF repeater. Went with a 4-bay dipole as
a replacement, along with switching out the old coax with 1/2" hardline.
Everything else stayed the same, VXR-7000 and internal duplexer. All worked
well after a final check, until night came along, when it seems t
waterproof connections?
- Original Message -
From: kfd29
To: Repeater-Builder@yahoogroups.com
Sent: Friday, July 10, 2009 9:58 AM
Subject: [Repeater-Builder] Repeater Desense?
Just replaced a damaged mast for our VHF repeater. Went with a 4-bay dipole
as a replacement
, July 10, 2009 7:08 AM
Subject: Re: [Repeater-Builder] Repeater Desense?
waterproof connections?
- Original Message -
From: kfd29
To: Repeater-Builder@yahoogroups.com
Sent: Friday, July 10, 2009 9:58 AM
Subject: [Repeater-Builder] Repeater Desense?
Just
ert but am only throwing out suggestions.
Brian
- Original Message -
From: Maire-Radios
To: Repeater-Builder@yahoogroups.com
Sent: Friday, July 10, 2009 7:08 AM
Subject: Re: [Repeater-Builder] Repeater Desense?
waterproof connections?
- Original Message -
what does the watt meter show? normal? reflected?
- Original Message -
From: Ken Franks
To: Repeater-Builder@yahoogroups.com
Sent: Friday, July 10, 2009 10:16 AM
Subject: Re: [Repeater-Builder] Repeater Desense?
I was wondering the same... are you thinking a bad
Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of kfd29
Sent: Friday, July 10, 2009 6:59 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Repeater Desense?
Just replaced a damaged mast fo
mailto:fra...@godwinschools.org]
Sent: Friday, July 10, 2009 8:04 AM
To: Eric Lemmon
Subject: RE: [Repeater-Builder] Repeater Desense?
it is a commercial VHF (rx 152, tx 159). yes, the duplexer is mounted
inside. I went to take a look at the make/model and it was not legible due
to a faded sticker. It should
adapters. RG-213/U, 9913, and LMR-400 are definitely a no-no!
73, Eric Lemmon WB6FLY
-Original Message-
From: Ken Franks [mailto:fra...@godwinschools.org]
Sent: Friday, July 10, 2009 8:49 AM
To: Eric Lemmon
Subject: RE: [Repeater-Builder] Repeater Desense?
Thanks! I'll check it out
Yes. Many repeater receivers are simply not well enough shielded to
keep the TX from leaking into the RX box. Even some commercial
repeaters will suffer desense if 100% shielded feedline is not used. I
have seen serious desense occur when a dual-band (2m/440) antenna is
used on a repeater, due t
At 5/12/2005 12:37 PM, you wrote:
>Yes. Many repeater receivers are simply not well enough shielded to
>keep the TX from leaking into the RX box. Even some commercial
>repeaters will suffer desense if 100% shielded feedline is not used. I
>have seen serious desense occur when a dual-band (2m/440
Bob,
The most recent instance was with a Cushcraft ARX-270 2m/440 antenna. I
watched this antenna being assembled, and I can state that there was no
corrosion, maladjustment, or looseness involved. We used that antenna briefly
for a 2m repeater simply because it was already in place, and we had
At 5/12/2005 01:41 PM, you wrote:
>Bob,
>
>The most recent instance was with a Cushcraft ARX-270 2m/440 antenna.
Yup, heard similar stories about unexplained desense with that particular
antenna. Possibly a bad capacitor. At any rate, unusable for duplex
service. Definitely not representative
;Eric Lemmon" <[EMAIL PROTECTED]>
To:
Sent: Thursday, May 12, 2005 3:41 PM
Subject: Re: [Repeater-Builder] Repeater Desense
> Bob,
>
> The most recent instance was with a Cushcraft ARX-270 2m/440 antenna. I
> watched this antenna being assembled, and I can state t
Eric Lemmon wrote:
>The most recent instance was with a Cushcraft ARX-270 2m/440 antenna.
>
I tried one of these antennas first as a low profile repeater antenna,
then as a remote base antenna. I was so disappointed with it that I
took it down and threw it in the trash. Yes it was brand new.
>
>Repeater Builder is currently vending a dual band antenna that works
>well in duplex service. We'll have several at Dayton, with a special
>show price.
>Scott and I have installed several for non critical ham repeater duty
>and are very pleased with their performance so far.
I won't be able t
How can I test receive side of duplexer. It receives very Strong
signals only.
Tim
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Tim,
One very basic test is to use a service monitor to first determine the
sensitivity of your repeater's receiver at 12 dB SINAD. Let's say you
measure its sensitivity as -117 dBm. Now disable the repeater function
and, with the duplexer hooked up to both the transmitter and the
receiver, rep
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