I just took the door off of the Sinclair Duplexer cabinet and measured the
cavities length - they're 24 long.
LJ
Original Message:
-
From: Q [EMAIL PROTECTED]
Date: Sun, 31 Oct 2004 11:39:34 -0500
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Help needed
HAS ANYONE RUN A CW IDer TIMER THROUGH A RICK BEFORE ??
Juno Platinum $9.95. Juno SpeedBand $14.95.
Sign up for Juno Today at http://www.juno.com!
Look for special offers at Best Buy stores.
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No But I have one for sale.
Mike
Oregon Repeater Linking Group
Mike Mullarkey
[EMAIL PROTECTED]
www.orlg.org
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: Wednesday, November 03, 2004 7:01 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re:
Hi Gang, I'm looking for a 146.1 Rx crystal for a MASTRII. Also if
you have or need to sell a pair 146.700 TX/ 146.100 Rx let me know.
I have a source for the 146.7 Tx but will take a pair at a fair
price.
Thanks!
73
AC0Y
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Here is the situation with the repeater I maintain that runs 300W on TX.
Repeater antennas are at 1300 ft feed through 3/4 in 75 ohm line. The
majority of the user base is 40 to 60 miles from the site. We have a remote
input about 60 miles from the repeater to provide HT and mobile coverage
for
This sounds wild. However, if he's running 1300' of 0.750 CATV trunk line,
his loss could be as much as 2.0 dB per 100-foot. That's 26-dB loss. Take
out say 6-db for antenna gain. This leaves him with 3-Watts ERP. If it was
1.0 dB per 100-foot, then the ERP would be about 60-Watts. I just
Steve Grantham wrote:
This sounds wild. However, if he's running 1300' of 0.750 CATV trunk line,
his loss could be as much as 2.0 dB per 100-foot. That's 26-dB loss. Take
out say 6-db for antenna gain. This leaves him with 3-Watts ERP. If it was
1.0 dB per 100-foot, then the ERP would be
I know that if a part fails on ANY antenna everything changes, I used to
recall the old Squallo antennas, I discovered a broken lead wire to the
capacitor was giving a high SWR reading.
I also recently bought a used 2M. Ringo antenna, cleaned it up, and
retighten everything, works fine now.
zr6anf wrote:
Dear Reader
Our Amateur Radio Club have been donated a Nucleus Repeater in
visibly mint condition. It comprises the following items:
1. 19 Cabinet
Motorola Nucleus
Serial Number: 711CUN0474
FO Number: 5540-0180-90100
Model Number: T5481A
PD: 07/01/94
WK: 30
2.
how about lower power , better hard line and a more gain DB antenna.
- Original Message -
From: kf0m [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, November 03, 2004 11:50 PM
Subject: RE: [Repeater-Builder] Solid State VHF PAs (200+ watts of power)
Here
Hey guys,
This may be a dumb question, but what's the formula for figuring out the
second harmonic of a repeater freq?
Thanks,
Jed
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At 01:37 PM 11/4/2004 -0500, you wrote:
Hey guys,
This may be a dumb question, but what's the formula for figuring out the
second harmonic of a repeater freq?
Simple. Freq x 2. The 3rd harmonic would be Freq x 3, and so on...
Ken
Good comments! The point is there are circumstances that would make running
higher power appropriate and not necessarily excessive. I guess the gent
can speak to this, but with that much tower, considering the stated use of
remote receivers, the feedline loss, and the high transmitter power, I
Say you have a central repeater with a voting system and a handful of
satellite receivers, each of which has its own discrete UHF path back
to the receivers feeding the voter. Each remote site has to ID its
transmitter when active and, unless filtered out, this ID will then
be relayed via
A few options:
1. Send the ID at, for example, 2600 Hz, and have notch filters to remove
2600 Hz at the link receiver at the main site. You need to notch the ID's
before voting lest you confuse the comparator.
2. Use smart ID'ers on the aux link transmitters without encoding PL such
that
Bob wrote:
Say you have a central repeater with a voting system and a handful of
satellite receivers, each of which has its own discrete UHF path back
to the receivers feeding the voter. Each remote site has to ID its
transmitter when active and, unless filtered out, this ID will then
That's how I usually do it. ID without CTCSS and keep the ID as short as
possible (IOW, no /A, no DE, no /RPT or /LINK) - just the callsign, and
keep it at 20 WPM. Yes, on those who keyup immediately, and capture the
IDing site, you may hear part of an ID, but only for a second at most.
An easy
I am the proud(?) new owner of what a believe to be a T1507
duplexer. I believe it is a bandpass only duplexer. I use, and am
familiar with, the T1504's which are Bp-Br duplexers. If the
duplexer in question is actually a T1507 it would seem to have
inferior receiver isolation of 55 dB vs 80
55 dB should be adequate isolation for a repeater,
unless you are running a high gain pre-amp and/or high
power.
These duplexers are better in most ways than the BP/BR
type because they provide better isolation at most
frequencies further removed from the TX/RX. A small
spur on your TX that is
I developed and use Squelch Faking. I have a tone generator at 6000 Hz that
runs down the link TX whenever COS is not present, deviates the transmitter
about 1.5 KHz. This fools the squelch circuit in the reciever to close becuase
of the high frequency component and has the added advantage of
20 matches
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