Gary,
Duplexer of choice for me is the Sinclair Q2330E. I have had very good
results with these on our 75 Watt VHF Micor stations and we use a Angle
Linear preamp on the receivers.
In your situation where you have a brand new Telewave, I would be
tempted to call up Telewave and order 2 more
, 2008 8:12 PM
Subject: [Repeater-Builder] Re: How to figure cable length for duplexer?
Thanks for the info. I will call call Telewave for an education. The
TPRD1454 shows 77db of isolation and a minimum of a 1 meg split. I am
running .600 split here.
73's
Gary K2ACY
--- In Repeater-Builder
Operating a 500K spacing duplexer at 600K is not a problem
but trying to get a 1M spaced duplexer to operate at
600K will be. The issue is the way the individual
pass/notch filters interact with each other.
The issue is the Q and how the cavities with their included
loops/probes are
Output frequency is 145.450 input is
144.850. How do
I figure out
what length the cables should be between the rx side
and tx side
that
connect to the T-Connector? Thanks and 73's !
Gary K2ACY
If the duplexer was supplied from Telewave on 2M, then what you have is
right. LEAVE
Does the amount of power output make a difference with isolation? The
paperwork I got shows 82.3 isolation on RX and 81.5 on TX. It appears
the printout was done from a spectrum analyzer when TESSCO tuned the
duplexer. I am running 25 watts.
73's
Gary K2ACY
--- In
Jim,
Thanks for the response. The duplexer is a Telewave TPRD1554. They
are brand new and bought from Tessco tuned. The cable on the RX side
is marked 11 in black marker on the connector and the TX side is
marked 11 1/2 . Both cables terminate at the T. I just want to feel
assured that they
for the 2 meter band.
Bob M.
==
--- On Fri, 7/25/08, garyp609 [EMAIL PROTECTED] wrote:
From: garyp609 [EMAIL PROTECTED]
Subject: [Repeater-Builder] Re: How to figure cable length for duplexer?
To: Repeater-Builder@yahoogroups.com
Date: Friday, July 25, 2008, 7:09 PM
Jim,
Thanks
--- On Fri, 7/25/08, garyp609 [EMAIL PROTECTED] wrote:
From: garyp609 [EMAIL PROTECTED]
Subject: [Repeater-Builder] Re: How to figure cable length for duplexer?
To: Repeater-Builder@yahoogroups.com
Date: Friday, July 25, 2008, 7:09 PM
Jim,
Thanks for the response. The duplexer
73's Gary
--- In Repeater-Builder@yahoogroups.com, Ralph Mowery [EMAIL PROTECTED]
wrote:
--- On Fri, 7/25/08, garyp609 [EMAIL PROTECTED] wrote:
From: garyp609 [EMAIL PROTECTED]
Subject: [Repeater-Builder] Re: How to figure cable length for
duplexer?
To: Repeater-Builder
.
==
--- On Fri, 7/25/08, garyp609 [EMAIL PROTECTED] wrote:
From: garyp609 [EMAIL PROTECTED]
Subject: [Repeater-Builder] Re: How to figure cable length for
duplexer?
To: Repeater-Builder@yahoogroups.com
Date: Friday, July 25, 2008, 7:09 PM
Jim,
Thanks for the response. The duplexer
.
Bob M.
==
--- On Fri, 7/25/08, garyp609 [EMAIL PROTECTED] wrote:
From: garyp609 [EMAIL PROTECTED]
Subject: [Repeater-Builder] Re: How to figure cable length for duplexer?
To: Repeater-Builder@yahoogroups.com
Date: Friday, July 25, 2008, 8:12 PM
Thanks for the info. I will call call
before buying that duplexer.
Bob M.
==
--- On Fri, 7/25/08, garyp609 [EMAIL PROTECTED] wrote:
From: garyp609 [EMAIL PROTECTED]
Subject: [Repeater-Builder] Re: How to figure cable length for
duplexer?
To: Repeater-Builder@yahoogroups.com
Date: Friday, July 25, 2008, 8:12 PM
and configuration for the 2 meter band.
Bob M.
==
--- On Fri, 7/25/08, garyp609 [EMAIL PROTECTED] wrote:
From: garyp609 [EMAIL PROTECTED]
Subject: [Repeater-Builder] Re: How to figure cable length for duplexer?
To: Repeater-Builder@yahoogroups.com
Date: Friday, July 25, 2008, 7:09 PM
Jim,
Thanks
At 7/25/2008 18:02, you wrote:
As someone else mentioned, 77dB is nowhere near enough isolation,
especially at 600 kHz spacing. You need at least 90dB with double-shielded
coax between the duplexer and radios. As with so many other things in
life, more is better. This also translates to more
The values jive close with what I have here. An original
TPRD-1454 I ordered direct from Telewave on 145.470 MHz.
Have no problem running the mentioned duplexer at about 45
watts and a decent .2uV receiver. Works great... lasted without
fail from 1987 when I paid about $630 new for it. Prices
At the risk of sounding like Skipp, it all depends on the
quality of the repeater transmitter receiver.
Bob NO6B
We are Borg. You will be assimilated. Resistance is futile.
s.
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