I found tuning instructions for the DB4055 duplexer on
the R-B website, but I haven't been able to find any
specs on this unit.
Does anyone know what the insertion loss and maximum
power ratings are?
Is the low-split version suitable for use on 2 meters?
73 and aloha
Eric KH6CQ
Hello fine RF People,
I already know this is UHF mobile unit. I have the connector and cable
(s). What I need to know since I am new to all this RF stuff and think
this would make a good project is, is this all here?
Unit was found in an old shed. Lots of corrosion in the PA section.
connector
--- In Repeater-Builder@yahoogroups.com, "Bruce Bagwell"
<[EMAIL PROTECTED]> wrote:
>is this all here?
>
> Unit was found in an old shed. Lots of corrosion in the PA section.
> connectors undone and bottom cover plate missing.
>
> Do all these use the same key? (On the Handle) Maybe I can find
Thats a good question Paul. Does any one know if there is an easy way to test
those things?
Wayne
The unit is a 100 watt UHF transceiver. They can be moved to the 440-450
band if you are willing to do a lot of work and have the proper test
equipment (or access to same).
Going from memory...
The Micor UHF mobiles used a single channel element for frequency
determination. The channel eleme
Bruce,
I don't think the yahoo boards will pass attachments.
I think Milt and others gave very good info on the Micor. There have been a
few manuals and keys on e-bay last few weeks. Most all Micor and other Mot
rigs used the same key.
I've done both 2m and UHF micor mobile conversions to re
Eric,
The DB4055 is 5 cavity band reject duplexer from Decibel Products.
Its notch is 75 to 80 db at 5 MHz. Min freq separation is 5 MHz making it
useless for 2 meters Ham repeater.
TX noise suppression at RX freq 70 db
RX isolation at TX freq 70 db.
Max power is 150 W continuous and insertio
Polyphaser used to offer a tester for their products. Don't know if it's still
available.
Chuck
WB2EDV
- Original Message -
From: Wayne Mahnker
To: Repeater-Builder@yahoogroups.com
Sent: Friday, April 04, 2008 10:07 AM
Subject: [Repeater-Builder] Re: Static on grounded fee
I replace the Polyphasers at the sites I'm responsible for every two years, or
sooner if a direct strike is suspected. Just because they pass RF OK doesn't
mean they're still doing the job efficiently. I believe it is cheap insurance
even it means replacing a half dozen or more at one site.
I h
I believe you could test them with a Megger, but you would also damage the
device at the same time. If it wasn't damaged before the test, it would be
after the test. That's why I have just replaced them rather than try to test
them.
Harry
- Original Message -
From: Wayne Mahnker
At 01:27 PM 04/03/08, you wrote:
i am trying to locate a logic point on the moto R100 repeater that will
take an active high 5 volts to an active low 0 volts or grn, then
release it when either the receiver is inactive ( no signal ) or the
xmitter is finished.
this will allow the id-o-matuic to s
Harry,
You don't see Polyphaser arrestors used much in commercial radio or cellular
phone systems, because the gas tubes are soldered in place and not easily
replaceable. I prefer to use Huber+Suhner devices, not only because the gas
tubes are easily replaceable, but also because the devices are
Hi all,
I've got a number of GE Phoenix 2 channel VHF transceivers that make
good link radios, IRLP/Echolink, dedicated repeater monitors, weather
receivers, etc. Before they go up on eBay, I'd wanted to offer them here.
Condition: Good, cases have minor scratches typical of used equipment, a
But, they can get unstable at low temperatures.
Joe M.
Rob wrote:
> Hi all,
>
> I've got a number of GE Phoenix 2 channel VHF transceivers that make
> good link radios, IRLP/Echolink, dedicated repeater monitors, weather
> receivers, etc. Before they go up on eBay, I'd wanted to offer them her
Antenna Tower steal 95 Ft tapered.
Built in 1960,
Central Pennsylvania.
Must remove from the site owner wants a donation for it.
Photo's available at http://good-
times.webshots.com/album/562985533mLTuoH
Contact Rich
[EMAIL PROTECTED]
Hello Groovy Guys and Gals,
I'm trying to help a friend repair and convert a Motorola
R100 Repeater
There's at least one eeprom inside the Motorola R100 repeater.
I'm told there is one for specific to the receiver programming.
Does anyone know the generic part number for that eeprom? Do
Rob,
What are the Combination Numbers for these radios?
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Rob
Sent: Friday, April 04, 2008 11:16 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] FS:
Hi Ron,
Thanks for the data. I realize that the separation is
not suitable; however, I was wondering if I could use
some of the helical resonators in that duplexer as a
notch filter to reduce a nearby interfering signal.
That signal is at 148.325 MHz which is out of range
for the -A product.
Eric
You need a HI-pot tester to check the protection devices. You crank up the
voltage until they show a breakdown and see if it is breaking down at the
proper voltage for the device. It will not harm them at all as the current
is only a few micro amps..
Polyphaser used to market a small test set t
Hi Skipp,
I do have 2 Motorola R-100 VHF repeaters with various problems. The eeproms are
of no use to me. If you want them drop me a line.
Givan
-[ Received Mail Content ]--
Subject : [Repeater-Builder] Motorola R100 receiver eeprom part number - source
Date : Fri, 04 Ap
Two combo numbers available:
N5UU2W25BB
N5P11 (PSX-SE)
Some of the PSX-SE radios have the X2212 and few have the X2444 EEPROMS.
- Rob
Eric Lemmon wrote:
> Rob,
>
> What are the Combination Numbers for these radios?
>
> 73, Eric Lemmon WB6FLY
>
>
> -Original Message-
> From: Repea
There are non destructive ways of testing BUT in the telecomms game gas based
devices suitable for you application are less than $2.00 each so simple
replacement seems reasonable if you are on site anyway ?
To: Repeater-Builder@yahoogroups.com
From: [EMAIL PROTECTED]
Date: Fri, 4 Apr 2008 09:49
A good gadget for doing this is a simple capacitor testerlike made by
Heathkit and many others. Set the capacitor tester for "ceramic and mica" and
"leakage test" and connect the antenna side of the Polyphaser to the
tester-the radio side should be disconnected. Now, turn up the test vol
The EEPROM replacements from Motorola were all corrupt years ago and
have been discontinued. These EEPROMS go bad with age causing reading
and writing problems. We found a replacement for them, but they have
to be initialized first. The RX and TX, there are two of them, are
different.
--- In Re
Ok, I'll comment. I can't be the only one here on this list thinking
this way
This tower is nearly 50 years old and is loaded with antennas and feedlines.
The owner expects someone to remove all the hardware and take the tower
down, and then pay him money?
I'd think you'd be doing good
I concur..
Paul
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Chuck Kelsey
Sent: Friday, April 04, 2008 5:50 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Tower To go
Ok, I'll comment. I can't be
Chuck,
I agree. The tower owner should be applicative if someone took the tower for
free, but I would expect some one to charge for removing it.
A tower this old probably would not be touched by a professional. We had this
same problem at our local gov center with a 300 ft of what looked to b
I'll be able ti initialize the eeprom once I find out what
type it is. I'll reverse it out myself unless someone would
nicely report what it is in the generic part number.
Keep those cards and letters coming...
thanks
skipp
> The EEPROM replacements from Motorola were all corrupt years ag
Bruce-
The Micor is a solid radio. I've worked on many over the years. The
channel element generates the RX injection, plus or minus 11.7 mhz
(IF) and THAT, in turn, is mixed with the transmit exciter which
operates by a (ususlly) single crystal of 11.7 mhz (simplex), 16.7
mhz (+5 mhz offset),
Bruce-
The Micor is a solid radio. I've worked on many over the years. The
channel element generates the RX injection, plus or minus 11.7 mhz
(IF) and THAT, in turn, is mixed with the transmit exciter which
operates by a (ususlly) single crystal of 11.7 mhz (simplex), 16.7
mhz (+5 mhz offset),
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