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GE radios

bshanks@xxxxxxxxxx.xxx
 

I have found several mods for GE radios to convert them to repeaters. Most, if not all, descibe GE Mastr II. I have a GE Mastr Executive II. What is the difference? And, it is a UHF currently at 451.575. Will it operate within the Ham bands, or is the conversion too complex? Any help would be appreciated.

Thanks,

Bob
AB5UD
 

At 03:23 AM 2/26/99 -0000, you wrote:
From: bshanks@...

I have found several mods for GE radios to convert them to repeaters.
Most, if not all, descibe GE Mastr II. I have a GE Mastr Executive II.
What is the difference? And, it is a UHF currently at 451.575. Will it
operate within the Ham bands, or is the conversion too complex? Any help
would be appreciated.

The Mastr Exec II is a very close cousin the the Mastr II, but not exactly
the same. I actually like the Exec II a bit better, but I won't reject a
Mastr II.

Go to my conversion site:



You could say I specialize in the coversion of the Exec II desktop radios.

You'll have no trouble getting the 451 down to 440. No RF mods needed.
But you will need to do the alingnment. Not hard, but you'll need a sig
gen for the RX tuning.

Good luck with your project.


Ray, KD4BBM
John Lloyd, K7JL
 

Bob,

The UHF Exec II will tune to the 440- 450 ham band with no problem. Just put in the ham crystals and tune it up! The Exec II is a little different in how the modules connect together and how it is laid out. The Audio Squelch is completely different. They both work about the same. Modifications for Repeaters is
very simple and straightforward.

See the NHRC Webpage.

John Lloyd, K7JL

Utah VHF Society

------------------

bshanks@... wrote:

From: bshanks@...

I have found several mods for GE radios to convert them to repeaters. Most, if not all, descibe GE Mastr II. I have a GE Mastr Executive II. What is the difference? And, it is a UHF currently at 451.575. Will it operate within the Ham bands, or is the conversion too complex? Any help would be appreciated.

Thanks,

Bob
AB5UD

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de Ric KK5RIC
 

Hi Bob,

Yes the ExcII will make a great ham radio repeater. I have not finished
working up a written procedure for that unit as I am busy modifying the
Master II's.

If you can find a book for the radio, you can figure it out.

If not, I do GE modifications on Master II and Exec II's.

If you have more than one radio I will do a 2 for 1 deal if you want.

I have added some details regarding this.

de Ric KK5RIC


At 03:23 26-02-99 -0000, you wrote:
From: bshanks@...

I have found several mods for GE radios to convert them to repeaters.
Most, if not all, descibe GE Mastr II. I have a GE Mastr Executive II.
What is the difference? And, it is a UHF currently at 451.575. Will it
operate within the Ham bands, or is the conversion too complex? Any help
would be appreciated.



Thanks,



Bob

AB5UD

------------------------------------------------------------------------
If you like orange and blue, then you will love our new web site!

Onelist: Fostering connections and information exchange
------------------------------------------------------------------------
This list is sponsored by the owners and users of "RBTIP"


Prices:

GE Master II radios can be purchased from many sources, at this time I have
a some VHF units with the UHS (pre-amp) receiver, I have some already
pre-tuned on 146.62 Tx and 146.02 Rx and already modified for repeater
operation with the internal controller.  New crystals can be cut in
3 weeks or special ordered in 15 days at an extra cost.

GE Master II VHF, or 6 Meter, unit above on any standard amateur repeater
pair tuned and ready to install controller:

$360.00

Controller with Voice $200.00

Controller for linking $250.00


For the same repeater set up, but with the radio's being furnished by you,
GE Master II on any ham repeater band:

Your GE Master II radio modified, crystaled and re-tuned on any amateur
standard ARRL repeater pair tuned and ready to install built in controller:

$150.00

Controller with Voice $200.00

Controller for linking $250.00

Your GE Master II or Exec II, radio modified, crystaled and re-tuned on any
amateur standard ARRL repeater pair tuned and a DB-9 interface cable
installed for external controller:

$180.00

Many controllers available $150 to $2000.00
Many features available.




The GE units are crystal controlled. This are repeater grade units with
very clean transmitters and the receivers have helical front ends. They
are 8 channel capable, so you could install more than one frequency pair,
at about $60 each channel. Because of the quality these units are only
good for about 1 to 1.5 MHz without re-tuning.

The controller we normally use is designed for repeater with voice Id and
messages or with CW ID and linking.

To add phone patch and or linking requires a more expensive unit and the
external DB-9 interface.

These range from $150 to $2,000.

Or use yours, I can set up radio with DB-9 connector and cable to connect
to your controller. No additional charge to set up your controller with the
repeater, but you will need to send the controller to me for that. If you
do not send your controller, you will need to provide me the Make Model and
details of RX input and TX output levels. I have this information on ACC,
CAT-1000, NHRC-2/M2, Link Com units and a few others.

Complete documentation provided of repeater modifications, and any
interface to controller. Any controllers sold will have factory
documentation provided as well. Controllers sold by us will be
pre-programmed for your system, if desired.

Repeater Band Information:

10 Meter repeaters normally will be set up as a slit site, about 1 mile
apart. This will require a 10 Meter radio and a UHF radio for a link. The
10 Meter can be a GE Master II or a Exec II and the UHF can be either of
those or an MVP. Duplexers are ava ilable from commercial vendors for 10
meter 100 Khz spacing but are very expensive.

6 Meter repeaters normally will be set up as a slit site, about 1/2 0mile
apart or single site with duplexers. Split site will require a 6 Meter
radio and a UHF radio for a link. The 6 Meter can be a GE Master II or a
Exec II and the UHF can be either of those or an MVP. Duplexers are
available from commercial vendors for 6 meter .5 or 1 MHz spacing but are
very expensive. A group in Dallas builds some great 6 meter duplexers for
a super price.

2 Meter repeaters normally will be single site and will use split antennas
or duplexers. Duplexers are readily available for 600 Khz VHF repeaters
both used and new.

If you can consider UHF, you have many more options for portable emergency
systems. But UHF GE radios are hard to find. If you have some UHF GE
Master II or Master Exec II radios I will do a 2 for 1 exchange. You send
me two working radios, and I send you a working repeater for your
controller, or you can purchase a controller from us.

UHF duplexers are very small compared to 2 meter 600 kHz duplexers. UHF
used duplexers are available used and also new. Mobile duplexers are rated
at 50 watts and many are found used at hamfests. With these mobile
duplexers on UHF you can cover close to 1 MHz of repeater band without
re-tuning the duplexers. At 25 Khz per channel that is 40 channels per MHz.

The transmitter power adjustment is available in these GE units, but you
must open the case and then remove the covers for the PA deck. Most of the
GE units in the Master II and Exec II series are in the 50 to 110 watt
versions. Unless the repeater is located in a building with air
conditioning or extra fans added for cooling, I run the 100 watt units at
50 to 60 watts and the 65 watt units at 45 watts unless extra fans are added.

In general I do not have any controls on these units. The controls are
inside the unit or the unit control head I furnish and not accessible to
the operator, except for through a small hole in the control head. An
external speaker jack is accessible.


I can build the units with the original GE control head, but you have to be
careful because the operator can change the repeater levels and squelch
settings. If you use the internal controller or some of the newer
controllers that use discriminator audio, these can be utilized with a
local control and not have any effect on the audio level. The squelch
control will effect the repeaters operation. The units may be set up for
CTCSS (PL, CG) tone operation. This will require a tone board from CES.

I can send you some pictures, by E-mail attachment in JPEG format, of some
of our recent repeaters built. Or a color brochure we have by mail.

I also have some of my 50 watt UHF mobile repeater including duplexers with
the built in controller, if you want.

I built this for RACES/ARES use and originally had a controller with phone
patch, linking, and four function relays for external control.

I ran this unit for five years and never used any of those extra bells and
whistles, so I replaced the controller with the current KISS one, but this
one has voice messages that you can record by remote control, great for
Emergency/Disaster needs. And it will also allow you to run it as a
simplex repeater if needed as well.

I also built a similar unit for 2 Meters for the Big Bend ARC in Alpine TX
for mobile/portable use. We purchased Wacom 600 kHz duplexers for this
unit and it was installed in a large Van type truck. It was used in
Saragosa Tornado about 10 years ago. It is now installed in a large Pick
Up truck metal box, weatherproof and has solar panels, batteries and
portable 2m gain antenna installed and can be loaded into a 4 wheel drive
and set up on a mountain top. This unit only has a KISS controller.




I hope that this answers your questions.

de Ric kk5ric
6 Cedar Crest Road
HC 67 Box 157
Nogal NM 88341-9709

Do not ship anything to me without first makeing sure I will be here to
receive shipment.


Excuse the commercial, but:


Super 6.9 cents per minute telephone rates:



Many other super telephone services are linked to this page as well.
 

Hello Ric,

Here in Brazil, repeaters in the 6 meter band have an offset of [500 kHz], almost the same for 2 meters, which is [600 kHz]. I would like to know why it is so difficult to find a duplexer for this band, while for 2 meters it is much easier? Do you have a link to the website of this group in Dallas that builds 6 meter duplexers?
 

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I’m just guessing this, someone correct me if there’s a better answer. I have spent some time reading about duplexers and the many variations of filter cavities and very seldom see them produced by amateur radio manufacturers. There are a few hobby radio companies that have contributed, they seem to be early models mostly. Im sure there are some I’m unaware of too. Commercial radio use generally operates in UHF or VHF, 800 mHz portion of the band, with exceptions of course. The 6 meter portion of the HF band reserved almost exclusively for amateur use, amateur radio using commercial grade duplexers almost exclusively with few alternatives seems to have created a vacuum of sorts for HF duplexers. This is my guess. I may be wrong.


On Apr 8, 2024, at 12:34 AM, pu5aom.t_at_gmail.com_korabelleblue95@... wrote:

?
Hello Ric, Here in Brazil, repeaters in the 6 meter band have an offset of [500 kHz], almost the same for 2 meters, which is [600 kHz]. I would like to know why it is so difficult to find a duplexer f
Hello Ric,

Here in Brazil, repeaters in the 6 meter band have an offset of [500 kHz], almost the same for 2 meters, which is [600 kHz]. I would like to know why it is so difficult to find a duplexer for this band, while for 2 meters it is much easier? Do you have a link to the website of this group in Dallas that builds 6 meter duplexers?

AK4U paul combs
 

Six meter heliax duplexers:



Might give it a try!

Paul
AK4U


On Mon, Apr 8, 2024 at 5:26 AM, Brian via groups.io
<korabelleblue95@...> wrote:
I’m just guessing this, someone correct me if there’s a better answer. I have spent some time reading about duplexers and the many variations of filter cavities and very seldom see them produced by amateur radio manufacturers. There are a few hobby radio companies that have contributed, they seem to be early models mostly. Im sure there are some I’m unaware of too. Commercial radio use generally operates in UHF or VHF, 800 mHz portion of the band, with exceptions of course. The 6 meter portion of the HF band reserved almost exclusively for amateur use, amateur radio using commercial grade duplexers almost exclusively with few alternatives seems to have created a vacuum of sorts for HF duplexers. This is my guess. I may be wrong.


On Apr 8, 2024, at 12:34 AM, pu5aom.t_at_gmail.com_korabelleblue95@... wrote:

?
Hello Ric, Here in Brazil, repeaters in the 6 meter band have an offset of [500 kHz], almost the same for 2 meters, which is [600 kHz]. I would like to know why it is so difficult to find a duplexer f
Hello Ric,

Here in Brazil, repeaters in the 6 meter band have an offset of [500 kHz], almost the same for 2 meters, which is [600 kHz]. I would like to know why it is so difficult to find a duplexer for this band, while for 2 meters it is much easier? Do you have a link to the website of this group in Dallas that builds 6 meter duplexers?

Jim W7RY
 

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You are kinda wrong..

Low band (30-50 MHz) repeaters are still in use.
Mostly in the logging industry, (in the pacific northwest) and other highly forested areas used for communications.
Usually in the form of a community repeater where multiple logging companies share a repeater with multiple PL tones.

Power companies especially in rural communities almost always used low band base stations/repeaters. But that technology is mostly gone now. They have moved to high band or even 800 mhz.

The splits are usually quite wide, so a duplexer can be used.

For some reason, the amateur coordinating bodies sometimes seem to be technically naive as to the fact that a larger split on 6 meters is a better solution.
Sometimes, there is not enough spectrum in some countries to not accommodate a wide split.

Most duplexers are made my commercial companies that specialize in RF filtering of all types and frequencies between 30 and 1.2 GHz.
For example Sinclair, DB Products, Cellwave, TX-RX Systems, Bird Technologies, EMR Corporation etc.
Some of the above names have been changed in the above list, but a search engine search of the above names, will net you a huge amount of reading material on RF filtering in general.


73, Jim W7RY

On 4/8/2024 4:26 AM, Brian via groups.io wrote:
I’m just guessing this, someone correct me if there’s a better answer. I have spent some time reading about duplexers and the many variations of filter cavities and very seldom see them produced by amateur radio manufacturers. There are a few hobby radio companies that have contributed, they seem to be early models mostly. Im sure there are some I’m unaware of too. Commercial radio use generally operates in UHF or VHF, 800 mHz portion of the band, with exceptions of course. The 6 meter portion of the HF band reserved almost exclusively for amateur use, amateur radio using commercial grade duplexers almost exclusively with few alternatives seems to have created a vacuum of sorts for HF duplexers. This is my guess. I may be wrong.


On Apr 8, 2024, at 12:34 AM, pu5aom.t_at_gmail.com_korabelleblue95@... wrote:

?
Hello Ric, Here in Brazil, repeaters in the 6 meter band have an offset of [500 kHz], almost the same for 2 meters, which is [600 kHz]. I would like to know why it is so difficult to find a duplexer f
Hello Ric,

Here in Brazil, repeaters in the 6 meter band have an offset of [500 kHz], almost the same for 2 meters, which is [600 kHz]. I would like to know why it is so difficult to find a duplexer for this band, while for 2 meters it is much easier? Do you have a link to the website of this group in Dallas that builds 6 meter duplexers?

--
Thanks and 73, Jim W7RY
 

And don't forget part 90 required that you had to show the need for a low band repeater before the license would be issued. I'm not sure if that has been changed or not since I haven't dealt with low band repeaters in several years. My former employer, Entergy/GSU left lowband in the 90s for the world's largest 800 Smartzone system at the time.. I was lucky to get a couple of the low band radios before they went off to a consignment dealer..

In '97 I proposed Texas go to the Northwest US 1.7 offset ... It got shelved due to politics... Then the TXVHFM Society, in total stupidity, changed the band plan without a membership vote or poll as required by the bylaws and allows one megahertz offset repeaters across the entire three megahertz spectrum. Outputs on inputs ..duh....

Yeah that was real smart.. a number of us who are life members of the society are thinking about a class action lawsuit. In fact they are also coordinating FM analog repeaters on 10 kilohertz splits on two meters with no vote or poll as required..Another violation of the bylaws.

Idiots...


Chris WB5ITT?

On Mon, Apr 8, 2024, 8:08 AM Jim W7RY via <jimw7ry=zohomail.com@groups.io> wrote:
You are kinda wrong..

Low band (30-50 MHz) repeaters are still in use.
Mostly in the logging industry, (in the pacific northwest) and other highly forested areas used for communications.
Usually in the form of a community repeater where multiple logging companies share a repeater with multiple PL tones.

Power companies especially in rural communities almost always used low band base stations/repeaters. But that technology is mostly gone now. They have moved to high band or even 800 mhz.

The splits are usually quite wide, so a duplexer can be used.

For some reason, the amateur coordinating bodies sometimes seem to be technically naive as to the fact that a larger split on 6 meters is a better solution.
Sometimes, there is not enough spectrum in some countries to not accommodate a wide split.

Most duplexers are made my commercial companies that specialize in RF filtering of all types and frequencies between 30 and 1.2 GHz.
For example Sinclair, DB Products, Cellwave, TX-RX Systems, Bird Technologies, EMR Corporation etc.
Some of the above names have been changed in the above list, but a search engine search of the above names, will net you a huge amount of reading material on RF filtering in general.


73, Jim W7RY

On 4/8/2024 4:26 AM, Brian via wrote:
I’m just guessing this, someone correct me if there’s a better answer. I have spent some time reading about duplexers and the many variations of filter cavities and very seldom see them produced by amateur radio manufacturers. There are a few hobby radio companies that have contributed, they seem to be early models mostly. Im sure there are some I’m unaware of too. Commercial radio use generally operates in UHF or VHF, 800 mHz portion of the band, with exceptions of course. The 6 meter portion of the HF band reserved almost exclusively for amateur use, amateur radio using commercial grade duplexers almost exclusively with few alternatives seems to have created a vacuum of sorts for HF duplexers. This is my guess. I may be wrong.


On Apr 8, 2024, at 12:34 AM, pu5aom.t_at_gmail.com_korabelleblue95@... wrote:

?
Hello Ric, Here in Brazil, repeaters in the 6 meter band have an offset of [500 kHz], almost the same for 2 meters, which is [600 kHz]. I would like to know why it is so difficult to find a duplexer f
Hello Ric,

Here in Brazil, repeaters in the 6 meter band have an offset of [500 kHz], almost the same for 2 meters, which is [600 kHz]. I would like to know why it is so difficult to find a duplexer for this band, while for 2 meters it is much easier? Do you have a link to the website of this group in Dallas that builds 6 meter duplexers?

--
Thanks and 73, Jim W7RY
 

Also, six meters is certainly (low band) VHF, not HF.

Mick - W7CAT

----- Original Message -----
From: "Jim W7RY via groups.io"
To: repeater-builder@groups.io
Sent: Monday, April 08, 2024 07:08:43 AM
Subject: Re: [repeater-builder] GE radios

You are kinda wrong..

Low band (30-50 MHz) repeaters are still in use.
Mostly in the logging industry, (in the pacific northwest) and other
highly forested areas used for communications.
Usually in the form of a community repeater where multiple logging
companies share a repeater with multiple PL tones.

Power companies especially in rural communities almost always used low
band base stations/repeaters. But that technology is mostly gone now.
They have moved to high band or even 800 mhz.

The splits are usually quite wide, so a duplexer can be used.

For some reason, the amateur coordinating bodies sometimes seem to be
technically naive as to the fact that a larger split on 6 meters is a
better solution.
Sometimes, there is not enough spectrum in some countries to not
accommodate a wide split.

Most duplexers are made my commercial companies that specialize in RF
filtering of all types and frequencies between 30 and 1.2 GHz.
For example Sinclair, DB Products, Cellwave, TX-RX Systems, Bird
Technologies, EMR Corporation etc.
Some of the above names have been changed in the above list, but a
search engine search of the above names, will net you a huge amount of
reading material on RF filtering in general.


73, Jim W7RY

On 4/8/2024 4:26 AM, Brian via groups.io wrote:
I’m just guessing this, someone correct me if there’s a better answer.
I have spent some time reading about duplexers and the many variations
of filter cavities and very seldom see them produced by amateur radio
manufacturers. There are a few hobby radio companies that have
contributed, they seem to be early models mostly. Im sure there are
some I’m unaware of too. Commercial radio use generally operates in
UHF or VHF, 800 mHz portion of the band, with exceptions of course.
The 6 meter portion of the HF band reserved almost exclusively for
amateur use, amateur radio using commercial grade duplexers almost
exclusively with few alternatives seems to have created a vacuum of
sorts for HF duplexers. This is my guess. I may be wrong.


On Apr 8, 2024, at 12:34 AM,
pu5aom.t_at_gmail.com_korabelleblue95@... wrote:

?
Hello Ric, Here in Brazil, repeaters in the 6 meter band have an
offset of [500 kHz], almost the same for 2 meters, which is [600
kHz]. I would like to know why it is so difficult to find a
duplexer f
Hello Ric,

Here in Brazil, repeaters in the 6 meter band have an offset of [500
kHz], almost the same for 2 meters, which is [600 kHz]. I would like
to know why it is so difficult to find a duplexer for this band,
while for 2 meters it is much easier? Do you have a link to the
website of this group in Dallas that builds 6 meter duplexers?
--
Thanks and 73, Jim W7RY




--
Untitled Document
 

I have been converting Mastr Exec IIs to repeaters for a while.? It is simple. Most of the conversion is done on the SAS board (long board on the bottom).? This board has the sq circuit, audio for spkr (not really needed for repeater) 10V regulator for exciter and rcvr, and connections for the controller.? I do add a de-emphasis circuit between rcvr discriminator and controller/ exciter.? Tone/CTCSS connections are also on the SAS board, both rcv and xmt.

I can send diagram of the SAS board and the mods I do.? They keep rcvr active during xmt and route audio for the repeater.? All mods are just wiring.

The MII and ExecII are similar design, just laid out differently.? More room in Exec II for other things like a controller.? They share same PAs, packaged differently in lower power units, have same rcvr? helical front end, use same crystals.? Just MII has Icoms with osc in module, ExecII has crystal holders with osc on rcvr osc board and exciter.

73, ron, n9ee
AK4U paul combs
 

Ron, have you ever done the L.O. mod on a MII to get better sensitivity??

Paul
AK4U



On Mon, Apr 8, 2024 at 2:31 PM, Ron Wright via groups.io
<lt_wright_flg@...> wrote:
I have been converting Mastr Exec IIs to repeaters for a while.? It is simple. Most of the conversion is done on the SAS board (long board on the bottom).? This board has the sq circuit, audio for spkr (not really needed for repeater) 10V regulator for exciter and rcvr, and connections for the controller.? I do add a de-emphasis circuit between rcvr discriminator and controller/ exciter.? Tone/CTCSS connections are also on the SAS board, both rcv and xmt.

I can send diagram of the SAS board and the mods I do.? They keep rcvr active during xmt and route audio for the repeater.? All mods are just wiring.

The MII and ExecII are similar design, just laid out differently.? More room in Exec II for other things like a controller.? They share same PAs, packaged differently in lower power units, have same rcvr? helical front end, use same crystals.? Just MII has Icoms with osc in module, ExecII has crystal holders with osc on rcvr osc board and exciter.

73, ron, n9ee

 

It makes sense. Low band propagation would suit the aforementioned industries well given the expanse and terrain they operate in. Now that you mention it, HF would be the likely choice in such capacity. Good information.

On Apr 8, 2024, at 10:54 AM, Teton Amateur Radio Repeater Association (TARRA) <tarra_at_wyocat.com_korabelleblue95@...> wrote:

?Also, six meters is certainly (low band) VHF, not HF.

Mick - W7CAT

----- Original Message -----
From: "Jim W7RY via groups.io"
To: repeater-builder@groups.io
Sent: Monday, April 08, 2024 07:08:43 AM
Subject: Re: [repeater-builder] GE radios

You are kinda wrong..

Low band (30-50 MHz) repeaters are still in use.
Mostly in the logging industry, (in the pacific northwest) and other
highly forested areas used for communications.
Usually in the form of a community repeater where multiple logging
companies share a repeater with multiple PL tones.

Power companies especially in rural communities almost always used low
band base stations/repeaters. But that technology is mostly gone now.
They have moved to high band or even 800 mhz.

The splits are usually quite wide, so a duplexer can be used.

For some reason, the amateur coordinating bodies sometimes seem to be
technically naive as to the fact that a larger split on 6 meters is a
better solution.
Sometimes, there is not enough spectrum in some countries to not
accommodate a wide split.

Most duplexers are made my commercial companies that specialize in RF
filtering of all types and frequencies between 30 and 1.2 GHz.
For example Sinclair, DB Products, Cellwave, TX-RX Systems, Bird
Technologies, EMR Corporation etc.
Some of the above names have been changed in the above list, but a
search engine search of the above names, will net you a huge amount of
reading material on RF filtering in general.


73, Jim W7RY

On 4/8/2024 4:26 AM, Brian via groups.io wrote:
I’m just guessing this, someone correct me if there’s a better answer.
I have spent some time reading about duplexers and the many variations
of filter cavities and very seldom see them produced by amateur radio
manufacturers. There are a few hobby radio companies that have
contributed, they seem to be early models mostly. Im sure there are
some I’m unaware of too. Commercial radio use generally operates in
UHF or VHF, 800 mHz portion of the band, with exceptions of course.
The 6 meter portion of the HF band reserved almost exclusively for
amateur use, amateur radio using commercial grade duplexers almost
exclusively with few alternatives seems to have created a vacuum of
sorts for HF duplexers. This is my guess. I may be wrong.


On Apr 8, 2024, at 12:34 AM,
pu5aom.t_at_gmail.com_korabelleblue95@... wrote:

?
Hello Ric, Here in Brazil, repeaters in the 6 meter band have an
offset of [500 kHz], almost the same for 2 meters, which is [600
kHz]. I would like to know why it is so difficult to find a duplexer f
Hello Ric,

Here in Brazil, repeaters in the 6 meter band have an offset of [500
kHz], almost the same for 2 meters, which is [600 kHz]. I would like
to know why it is so difficult to find a duplexer for this band,
while for 2 meters it is much easier? Do you have a link to the
website of this group in Dallas that builds 6 meter duplexers?
--
Thanks and 73, Jim W7RY


--
Untitled Document
 

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Ron,

?? I would appreciate a copy of your SAS board diagram and mods.?? I have close to a hundred VHF mobiles, I think the high power ones.

?

?

73 de Steve N7VVW

?

From: repeater-builder@groups.io <repeater-builder@groups.io> On Behalf Of Ron Wright via groups.io
Sent: Monday, April 8, 2024 12:31 PM
To: repeater-builder@groups.io
Subject: Re: [repeater-builder] GE radios

?

I have been converting Mastr Exec IIs to repeaters for a while.? It is simple. Most of the conversion is done on the SAS board (long board on the bottom).? This board has the sq circuit, audio for spkr (not really needed for repeater) 10V regulator for exciter and rcvr, and connections for the controller.? I do add a de-emphasis circuit between rcvr discriminator and controller/ exciter.? Tone/CTCSS connections are also on the SAS board, both rcv and xmt.

I can send diagram of the SAS board and the mods I do.? They keep rcvr active during xmt and route audio for the repeater.? All mods are just wiring.

The MII and ExecII are similar design, just laid out differently.? More room in Exec II for other things like a controller.? They share same PAs, packaged differently in lower power units, have same rcvr? helical front end, use same crystals.? Just MII has Icoms with osc in module, ExecII has crystal holders with osc on rcvr osc board and exciter.

73, ron, n9ee

 

Hi Jim
?
I sent a private message to your email about radios or GE Mastr II Station.
?
PU5AOM

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