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Date
Re: G.E.Master ll vs G.E. Exectutive

mch
 

Ray Vaughan wrote:

I don't think there's a 100 or 110 watt Exec II.
There is, but they use Mastr II PAs - heatsink and all...

Joe, KR3P
Re: G.E.Master ll vs G.E. Exectutive

Ray Vaughan
 

At 10:18 PM 2/25/99 -0000, you wrote:
From: mtwilley@...

I have run into a problem finding G.E. Master ll UHF radios here. I have
found some Exectutive and from what I here they don't hold up as well as
the Master ll radios. Anyone have any coments...
Thanks
Mike
This should start an interesting debate.

I've found the PA in Mastr (note: Mastr not Master) II Repeaters has a real
weakness where the RF leaves the board. It's an easy fix if you get to it
before the transistors fail, but it's a very frequent failure.

I've only had one PS failure in an Exec II. No PA's yet. The Mastr II
does seem to be built a bit heavier. And if you want a LOT of power, Mastr
II is the only way to go. I don't think there's a 100 or 110 watt Exec II.
And there's better support for Mastr II. There's even a drop in
controller.

The ICOM's in a Mastr II are totally shielded. But the Exec II can use any
ICOM for any band. Nice when you're converting.

I have some Mastr II repeaters, but my work horse is an Exec II. It's also
my favorite to convert. See my conversion site:



I'm sure there's some technical problems in the Exec II that were cleared
up in the Mastr II.

If by any chance you mean Mastr Exec Radios (not Mastr Exec II) avoid them.
I have a couple. Real pain to work on. Not as modular as the others.
I've run one for years for one week a year, full time, for a Ham Fest info
channel. At least that PA is solid.

If there's something specific you're thinking about, let us know.

Ray, KD4BBM
Re: UHF Motorola Mitrek mobile?

mch
 

Ditto. Perhaps a post to the list might be in order?
It certainly is on-topic. :)

Joe, KR3P

Marvin Munster wrote:


John, Please, if you would, send me a copy of your notes. I am always
looking for improvements on my attempts to convert Mitreks to repeater
service.

I will look up my notes and
send them to you later on my duplex mods to the mitrek.

John Lloyd, K7JL
Re: UHF Motorola Mitrek mobile?

Marvin Munster
 

John, Please, if you would, send me a copy of your notes. I am always
looking for improvements on my attempts to convert Mitreks to repeater
service.
Thanks.
Marvin - WB6PKK


At 10:24 AM 2/25/99 -0700, you wrote:
From: John Lloyd <lloyd@...>

Gary,

The Mitreks are easy to modify for repeater service. You will need to
reduce the
TX Power output since the heatsink is small. You will need to make a
shield over
the Channel Elements to get more Tx to Rx isolation. I will look up my
notes and
send them to you later on my duplex mods to the mitrek.

John Lloyd, K7JL

Utah VHF Society
--------------------

w7ntf@... wrote:

From: w7ntf@...

Greetings,
This is Gary, W7N TF, in Spanaway, WA. I have two UHF Motorola Mitrek
mobiles
that I was going to convert to repeater service before I got ahold of my GE
Mastr-II mobiles. I may still go ahead and finish the project and keep a
Mitrek for a backup repeater. Has anyone successfully converted a UHF
Mitrek
mobile for repeater service? Was it difficult, and what problems did you
encounter? I bought a pair of rocks for one of my UHF repeater frequencies
and found that one of the two Mitreks fails to transmit... The other
transmits
and receives ok, but still requires an alignment. I am looking for TXA,
RXA,
COS, and PTT connections in order to interface with my LinkComm RLC-2A or
RLC-1 Plus controllers. I'd like to hear from you... Thanks.

73, de Gary, W7NTF

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G.E.Master ll vs G.E. Exectutive

[email protected]
 

I have run into a problem finding G.E. Master ll UHF radios here. I have found some Exectutive and from what I here they don't hold up as well as the Master ll radios. Anyone have any coments...
Thanks
Mike
Moto R2009 service monitor

Mark Sihlanick
 

I've got a Motorola R2009 service monito that's now got display problems.
Is there a better choice for repair than direct with Motorola?? (or are
there some quick checks that I should do first?)



Mark
n2qt
Re: UHF Motorola Mitrek mobile?

Bill Anderson WB9TEW
 

John, Please include me when you mail your notes, I am always looking for ways to
improve my repeater and you may have a new angle I may have overlooked.
Bill Anderson WB9TEW

John Lloyd wrote:

From: John Lloyd <lloyd@...>

Gary,

The Mitreks are easy to modify for repeater service. You will need to reduce the
TX Power output since the heatsink is small. You will need to make a shield over
the Channel Elements to get more Tx to Rx isolation. I will look up my notes and
send them to you later on my duplex mods to the mitrek.

John Lloyd, K7JL

Utah VHF Society
--------------------

w7ntf@... wrote:

From: w7ntf@...

Greetings,
This is Gary, W7N TF, in Spanaway, WA. I have two UHF Motorola Mitrek mobiles
that I was going to convert to repeater service before I got ahold of my GE
Mastr-II mobiles. I may still go ahead and finish the project and keep a
Mitrek for a backup repeater. Has anyone successfully converted a UHF Mitrek
mobile for repeater service? Was it difficult, and what problems did you
encounter? I bought a pair of rocks for one of my UHF repeater frequencies
and found that one of the two Mitreks fails to transmit... The other transmits
and receives ok, but still requires an alignment. I am looking for TXA, RXA,
COS, and PTT connections in order to interface with my LinkComm RLC-2A or
RLC-1 Plus controllers. I'd like to hear from you... Thanks.

73, de Gary, W7NTF

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Come visit our new web site and explore a new interest
------------------------------------------------------------------------
This list is sponsored by the owners and users of "RBTIP"

------------------------------------------------------------------------
Come check out our brand new web site!

Onelist: Making the Internet intimate
------------------------------------------------------------------------
This list is sponsored by the owners and users of "RBTIP"
Re: UHF Motorola Mitrek mobile?

Lou Harris
 

I have successfully converted two UHF and one VHF mitrek radios to repeater
service.

1) check out www.seits.org for info on cenversion
2) the radio's must be aligned propperly BEFORE beginning the mods.
3) the radio that is 'not xmitting' will probably come alive during the
alignment process.

good luck
LOU<<<


-----Original Message-----
From: w7ntf@... [mailto:w7ntf@...]
Sent: Thursday, February 25, 1999 11:12 AM
To: repeater-builder@...
Subject: [repeater-builder] UHF Motorola Mitrek mobile?


From: w7ntf@...

Greetings,
This is Gary, W7N TF, in Spanaway, WA. I have two UHF Motorola
Mitrek mobiles
that I was going to convert to repeater service before I got
ahold of my GE
Mastr-II mobiles. I may still go ahead and finish the project and keep a
Mitrek for a backup repeater. Has anyone successfully converted a
UHF Mitrek
mobile for repeater service? Was it difficult, and what problems did you
encounter? I bought a pair of rocks for one of my UHF repeater
frequencies
and found that one of the two Mitreks fails to transmit... The
other transmits
and receives ok, but still requires an alignment. I am looking
for TXA, RXA,
COS, and PTT connections in order to interface with my LinkComm RLC-2A or
RLC-1 Plus controllers. I'd like to hear from you... Thanks.

73, de Gary, W7NTF

------------------------------------------------------------------------
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Come visit our new web site and explore a new interest
------------------------------------------------------------------------
This list is sponsored by the owners and users of "RBTIP"
Re: UHF Motorola Mitrek mobile?

John Lloyd
 

Gary,

The Mitreks are easy to modify for repeater service. You will need to reduce the
TX Power output since the heatsink is small. You will need to make a shield over
the Channel Elements to get more Tx to Rx isolation. I will look up my notes and
send them to you later on my duplex mods to the mitrek.

John Lloyd, K7JL

Utah VHF Society
--------------------

w7ntf@... wrote:

From: w7ntf@...

Greetings,
This is Gary, W7N TF, in Spanaway, WA. I have two UHF Motorola Mitrek mobiles
that I was going to convert to repeater service before I got ahold of my GE
Mastr-II mobiles. I may still go ahead and finish the project and keep a
Mitrek for a backup repeater. Has anyone successfully converted a UHF Mitrek
mobile for repeater service? Was it difficult, and what problems did you
encounter? I bought a pair of rocks for one of my UHF repeater frequencies
and found that one of the two Mitreks fails to transmit... The other transmits
and receives ok, but still requires an alignment. I am looking for TXA, RXA,
COS, and PTT connections in order to interface with my LinkComm RLC-2A or
RLC-1 Plus controllers. I'd like to hear from you... Thanks.

73, de Gary, W7NTF

------------------------------------------------------------------------
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Re: Cushman CE6A service monitor?

Loehrig, Robert (HT-EX)
 

Gary,

Try Triton Electronics Inc. in Rolling Meadows IL.
They do repairs, alignments and calibration.
I purchased the service manual (thick as a phonebook) on a CE6 from them
about a year ago for about $75.



Good Luck.

Bob Loehrig

-----Original Message-----
From: w7ntf@... [SMTP:w7ntf@...]
Sent: Thursday, February 25, 1999 11:18 AM
To: repeater-builder@...
Subject: [repeater-builder] Cushman CE6A service monitor?

From: w7ntf@...


Greetings,
I have a Cushman CE6A service monitor which would prove extremely helpful
in
my repeater projects. Unfortunately, my service monitor is in need of
repair.
Additionally, I do not have any kind of manuals for the CE6A. Does anyone
know
of a reputable company that could restore my CE6A to operation, align to
factory spec, and possibly also provide me with at least an operator or
users
manual?

The symptoms are that the service monitor loses lock on highband VHF and
is
completely unusable. Additionally, it works very poorly on the other
bands.... Very poor RX sensitivity, low RF output.... etc.

I would be very grateful if someone could point me in the right direction.
Thanks very much.

73, de Gary, W7NTF


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Re: 6 meter repeater..

John Lloyd
 

Tedd,

GE also has a version of the Motorola "extender" for Low Band.

DB Products makes a Low Band Loop Dipole that can be side mounted on a pole
or tower leg. It is a DB-212. They also make a directional antenna with 1
director, the DB-225 for 5 db of gain.
Db's phone number is 800-676-5342.

I would run around 50 watts with that PA. Your Transmitter duty cycle will
depend on how hot the PA gets.
You will need to check your system for desense when you get it all hooked
up. Reduce your power until the desense goes away! Or add more isolation to
your duplexer or use split antennas.


John Lloyd, K7JL

----------------------
Tedd Doda wrote:

From: "Tedd Doda" <lazer@...>

Hi John:

On Thu, 25 Feb 1999 01:22:02 -0500, John Hackman wrote:

I expect GE has something
similar, but I don't know what it's called. This will make a very great
difference in the operation of your repeater.
How do I find out? I used the Mitrek on 52.525 with a bunch
of computers in the area, and found it to be quite quiet. My
Alinco DR-M06 is horrible at noise rejection on the other
hand. Both radios hooked to the same antenna (not at the
same time, hi!) shows the Mitrek has a fantastic Receiver.

From all the replies I received, I get the impression that
either the Master II or the Mitrek will work well.

A couple other questions.....

I purchased a commercial 1/4 wave ground plane antenna. From
experience, will this suffice for the repeater, or should I
look around for a better solution? The antenna will be mounted
about 140 feet above ground feed with 1 5/8" heliax. I've been
looking around but can't find any side mounted dipoles for 6m.
Is there some other design I should look at.

The DB product duplexor has been tuned up and I got about
91 Db isolation from TX to RX. What would you recommend for
maximum TX power, to keep desence to a minimum? After visiting
the Master II mods page, they said that the transmitter doesn't
like going below 40% of maximum TX power, and it's a 110 watt
unit. Therefore, the minimum power I should set it to is
about 40 to 45 watts. Is that too much?

Ideas?

Tedd Doda CET

packet va3sed@va3sed
e-mail lazer@...

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Come visit our new web site and explore a new interest
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Re: UHF Motorola Mitrek mobile?

Lou Harris
 

-----Original Message-----
From: w7ntf@... [mailto:w7ntf@...]
Sent: Thursday, February 25, 1999 11:12 AM
To: repeater-builder@...
Subject: [repeater-builder] UHF Motorola Mitrek mobile?


From: w7ntf@...

Greetings,
This is Gary, W7N TF, in Spanaway, WA. I have two UHF Motorola
Mitrek mobiles
that I was going to convert to repeater service before I got
ahold of my GE
Mastr-II mobiles. I may still go ahead and finish the project and keep a
Mitrek for a backup repeater. Has anyone successfully converted a
UHF Mitrek
mobile for repeater service? Was it difficult, and what problems did you
encounter? I bought a pair of rocks for one of my UHF repeater
frequencies
and found that one of the two Mitreks fails to transmit... The
other transmits
and receives ok, but still requires an alignment. I am looking
for TXA, RXA,
COS, and PTT connections in order to interface with my LinkComm RLC-2A or
RLC-1 Plus controllers. I'd like to hear from you... Thanks.

73, de Gary, W7NTF

------------------------------------------------------------------------
Did you know that we have over 85,000 e-mail communities at Onelist?

Come visit our new web site and explore a new interest
------------------------------------------------------------------------
This list is sponsored by the owners and users of "RBTIP"
Re: UHF Motorola Mitrek mobile?

Rick Sherman
 

I use one as a portable/emegency repeater. Conversion was fairly easy.
Take a look at


Rick Sherman KM6TI

w7ntf@... wrote:

From: w7ntf@...

Greetings,
This is Gary, W7N TF, in Spanaway, WA. I have two UHF Motorola Mitrek mobiles
that I was going to convert to repeater service before I got ahold of my GE
Mastr-II mobiles. I may still go ahead and finish the project and keep a
Mitrek for a backup repeater. Has anyone successfully converted a UHF Mitrek
mobile for repeater service? Was it difficult, and what problems did you
encounter? I bought a pair of rocks for one of my UHF repeater frequencies
and found that one of the two Mitreks fails to transmit... The other transmits
and receives ok, but still requires an alignment. I am looking for TXA, RXA,
COS, and PTT connections in order to interface with my LinkComm RLC-2A or
RLC-1 Plus controllers. I'd like to hear from you... Thanks.

73, de Gary, W7NTF

------------------------------------------------------------------------
Did you know that we have over 85,000 e-mail communities at Onelist?

Come visit our new web site and explore a new interest
------------------------------------------------------------------------
This list is sponsored by the owners and users of "RBTIP"
Re: UHF Motorola Mitrek mobile?

Bill Anderson WB9TEW
 

Gary,
Check out the repeater pages at the following.
www.seits.org
Bill

w7ntf@... wrote:

From: w7ntf@...

Greetings,
This is Gary, W7N TF, in Spanaway, WA. I have two UHF Motorola Mitrek mobiles
that I was going to convert to repeater service before I got ahold of my GE
Mastr-II mobiles. I may still go ahead and finish the project and keep a
Mitrek for a backup repeater. Has anyone successfully converted a UHF Mitrek
mobile for repeater service? Was it difficult, and what problems did you
encounter? I bought a pair of rocks for one of my UHF repeater frequencies
and found that one of the two Mitreks fails to transmit... The other transmits
and receives ok, but still requires an alignment. I am looking for TXA, RXA,
COS, and PTT connections in order to interface with my LinkComm RLC-2A or
RLC-1 Plus controllers. I'd like to hear from you... Thanks.

73, de Gary, W7NTF

------------------------------------------------------------------------
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Come visit our new web site and explore a new interest
------------------------------------------------------------------------
This list is sponsored by the owners and users of "RBTIP"
Re: 6 meter repeater..

John Lloyd
 

Tedd,

The Mastr II solid state is a much better radio for repeater use. You could
use one of the others, but I would choose the Mastr II.

John, K7JL
---------------

Tedd Doda wrote:

From: "Tedd Doda" <lazer@...>

Hi People:

I'm looking for information on modifing either a tube final
GE Master, or a mobile Canadian GE MC74XC833A (100 watt mobile,
Master II I think?)for repeater use.

Which would be the better choice?

I also have a Mitrek...would this be better for use in a
repeater?

This is my first 6 meter repeater project, and I would like
to hear any thoughts on what to use. I have DB products
duplexor (6 can helical resonator, notch) to use and is
all tuned up and ready to go. All I have to figure out
is what radio to use and how to modify it for duplex
operation.

Thanks kindly,

Tedd Doda CET

packet va3sed@va3sed
e-mail lazer@...

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Re: UHF Motorola Mitrek mobile?

[email protected]
 

Hello John,
Thanks very much for your assistance. I really appreciate your quick response.
It would be great to put my Mitreks into service. They've been gathering dust
for quite some time. I'll look forward to hearing from you soon.

73, de Gary, W7NTF
Re: Cushman CE6A service monitor?

[email protected]
 

Hi Bob,
Thanks very much for your assistance. I'll check them out.

73, Gary, W7NTF
Re: 6 meter repeater..

Tedd Doda
 

Hi John:

On Thu, 25 Feb 1999 01:22:02 -0500, John Hackman wrote:

I expect GE has something
similar, but I don't know what it's called. This will make a very great
difference in the operation of your repeater.
How do I find out? I used the Mitrek on 52.525 with a bunch
of computers in the area, and found it to be quite quiet. My
Alinco DR-M06 is horrible at noise rejection on the other
hand. Both radios hooked to the same antenna (not at the
same time, hi!) shows the Mitrek has a fantastic Receiver.

From all the replies I received, I get the impression that
either the Master II or the Mitrek will work well.

A couple other questions.....

I purchased a commercial 1/4 wave ground plane antenna. From
experience, will this suffice for the repeater, or should I
look around for a better solution? The antenna will be mounted
about 140 feet above ground feed with 1 5/8" heliax. I've been
looking around but can't find any side mounted dipoles for 6m.
Is there some other design I should look at.

The DB product duplexor has been tuned up and I got about
91 Db isolation from TX to RX. What would you recommend for
maximum TX power, to keep desence to a minimum? After visiting
the Master II mods page, they said that the transmitter doesn't
like going below 40% of maximum TX power, and it's a 110 watt
unit. Therefore, the minimum power I should set it to is
about 40 to 45 watts. Is that too much?

Ideas?


Tedd Doda CET

packet va3sed@va3sed
e-mail lazer@...
Cushman CE6A service monitor?

[email protected]
 

Greetings,
I have a Cushman CE6A service monitor which would prove extremely helpful in
my repeater projects. Unfortunately, my service monitor is in need of repair.
Additionally, I do not have any kind of manuals for the CE6A. Does anyone know
of a reputable company that could restore my CE6A to operation, align to
factory spec, and possibly also provide me with at least an operator or users
manual?

The symptoms are that the service monitor loses lock on highband VHF and is
completely unusable. Additionally, it works very poorly on the other
bands.... Very poor RX sensitivity, low RF output.... etc.

I would be very grateful if someone could point me in the right direction.
Thanks very much.

73, de Gary, W7NTF
UHF Motorola Mitrek mobile?

[email protected]
 

Greetings,
This is Gary, W7N TF, in Spanaway, WA. I have two UHF Motorola Mitrek mobiles
that I was going to convert to repeater service before I got ahold of my GE
Mastr-II mobiles. I may still go ahead and finish the project and keep a
Mitrek for a backup repeater. Has anyone successfully converted a UHF Mitrek
mobile for repeater service? Was it difficult, and what problems did you
encounter? I bought a pair of rocks for one of my UHF repeater frequencies
and found that one of the two Mitreks fails to transmit... The other transmits
and receives ok, but still requires an alignment. I am looking for TXA, RXA,
COS, and PTT connections in order to interface with my LinkComm RLC-2A or
RLC-1 Plus controllers. I'd like to hear from you... Thanks.

73, de Gary, W7NTF
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