开云体育

Hi All,

Has anyone built a repeater out of a ge master 2 uhf with the silver
handle???and if so did you have spurs and general noise on the rf output???
I believe these typically have a vhf exiciter and a "tripler pa" in them
and aren't good for repeaters...althought they are very easy to come by and
very cheap.....
Thanks in advance for you thoughts and comments...

Mike KA2NDW

Mike:

I had to stop and think for a minute since it has been some time since I tuned up
an MX, but there really is not much to do to tune up the transmitter. For the
later versions of these radios, Motorola made a separate service manual and a
troubleshooting manual. Tune up instructions are in the service manual. I do not
have a service manual for a crystal controlled MX, but do have tuneup instructions
for a PX-300 crystal controlled which is the PT version and also manuals for the
PX-300-S. I have service manuals for the UHF and VHF MX radios.

For the crystal controlled PX (MX), the tuneup instructions start with R107 which
sets the power. Then you set the channel elements on frequency, CE101 to CE108.
Then you adjust R102 for deviation with a tone in the microphone.

If it is a synthesized model, you have to set the VCO by tuning the radio to the
highest and lowest frequency and measure the voltage at Pin 12 of U14. For the
UHF radio, the high frequency control voltage should be set no higher than 4.8
volts. For the lowest frequency, the control voltage should be set no less than
1.8 V. The adjustment is to L4. You should also check this for the highest and
lowest frequency for the receiver and make sure that the voltage is in the same
range. As a practical matter, I found that the VCO would lock from 1.0 V to 7.0
volts, but I suspect that it would not cover the temperature range of the radio.
I would set it right in the ham bands and use the upper end to reach into the
public service frequencies to monitor and not program the transmitter.

For VHF, the voltage range is 1.4 Volts low and 4.75 volts on high. The coil
adjustment and pin 12 of U14 is the same.

After this, you set the frequency and adjust R107 for the appropriate power
level: 1.0 Watt, 2.5 Watts, and 6 watts for VHF and 1.0 Watts, 2.0 Watts, and 5.0
Watts for UHF.

I hope this is helpful.

73

Micheal Salem N5MS


HQ54@... wrote:

Hi guys:

I acquired a 2 bay, 6 meter Sinclair antenna at our main
repeater site. It was tuned for 45 Mhz and that was verified
by checking the return loss. At my 6 meter repeater output,
the return loss is about -10 db (a little over 2:1 SWR).

Is it practical to use a tuner to bring it down to the 1.5:1
range or less? I'm worried that the tuner will be too sharp
to let the RX pass.

Any recommendations?


Tedd Doda CET CEO

Lazer Audio and Electronics

packet ve3tjd@va3sed
e-mail lazer@...

Hi guys:

I acquired a 2 bay, 6 meter Sinclair antenna at our main
repeater site. It was tuned for 45 Mhz and that was verified
by checking the return loss. At my 6 meter repeater output,
the return loss is about -10 db (a little over 2:1 SWR).

Is it practical to use a tuner to bring it down to the 1.5:1
range or less? I'm worried that the tuner will be too sharp
to let the RX pass.

Any recommendations?


Tedd Doda CET CEO

Lazer Audio and Electronics

packet ve3tjd@va3sed
e-mail lazer@...

Chris, I downloaded Internet Explorer 5.0 last night (half the night) and lost your snail mail address. It was my fault, would you send it to me again. Im off Wed and Thur and will try to get that info to you.
Sorry about that. Im too old for computers.
Dave

Hello Listmembers,

Many thanks to all for their comments and suggestions concerning duplexers for my UHF repeater. Through all of it, I have managed to secure a set of Sinclair UHF duplexers - Model Q3220E band-pass/band-reject 350W cans.

Thanks again for all of your help and suggestions,
Jeff Weinberg W8CQ/R 442.775/447.775
w8cq@...

NO!!!!!!!!!

----------

From: Repeater-builder-owner@...
To: Repeater-builder@...
Subject: [Repeater-builder] New Survey
Date: Monday, April 26, 1999 6:02 PM

From: Repeater-builder-owner@...

Hello,

There is a new survey for the Repeater-builder community.

Do the subscribers of this list wish toallow "For Sale" items from E-Bay

posted?

This survey is only for E-Bay posted links, and does not apply to

personal for sale posts.

----

Possible answers are:

o Yes
o No


To vote, please visit the following web page:




Thanks!

Repeater-builder Owner

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At 01:37 PM 4/27/99 , you wrote:

From: "Todd Ellis" <ellistr@...>

Anyone have any old Mobile Radio Technology (MRT) magazines sitting in a
back room somewhere? I'm looking specifically for the September 1995 issue,

No real tech throws out MRT magazine, no less any other trade magazine, you
should be whipped. I like the musty smell of newsprint in my basement,
it's an aquired sense of taste.

I have that issue.

Joe

Hi All<

Does anyone have a ge master 2 uhf radio that they would be willing to part
with at a resonable price.....my vhf repeater is done and ready to start on
uhf....only looking for master 2 .....
thanks,

Mike KA2NDW


mdewaele@...

Thanks to those who responded to my request about an old article in MRT.
You guys are great! David Waters, AC4JF faxed me a copy just a few minutes
ago.

Todd Ellis
Operations Manager,
Telecommunications Division
Booth & Associates, Inc.
1011 Schaub Drive
Raleigh, NC 27606
Tel: (919) 851-8770
Fax: (919) 859-5918
E-mail: ellistr@...

Hello,

I need some info on the following duplexer by Motorola
1. T1402 VHF 150 - 170 mhz.
2. T1402 UHF Don't't know what freq. range are they on.

What kind of duplexer are this duplexer. BP/BR may be?
Could this duplexer be tuned to both 2 meter and UHF ham band. How
much power could it handle? Any info is greatly appreciated.

Thanks,

_______________________________________________________________
Get Free Email and Do More On The Web. Visit

Jeff,

The Q3220E 's are good duplexers. I have used them on many different
sites and systems. I have spec sheets if you want to give me your fax
number. I don't have a scanner here at work.

John, K7JL

Jeff Weinberg W8CQ wrote:

Anyone have any old Mobile Radio Technology (MRT) magazines sitting in a
back room somewhere? I'm looking specifically for the September 1995 issue,
I badly need a copy or fax of a particular article from that issue. If you
have it, drop me a quick line; I'd really appreciate it. Thanks!

Todd Ellis, N2XL
Operations Manager,
Telecommunications Division
Booth & Associates, Inc.
1011 Schaub Drive
Raleigh, NC 27606
Tel: (919) 851-8770
Fax: (919) 859-5918
E-mail: ellistr@...

Gregg,
Try Tucker Electronics www.tucker.com, they referb and sell test equipment.
I have purchased service manuals from them in the past. You might find the
same model for sale at thier web site.
Good luck
Cris KE4IIF

I have a set of sinclair cavaties on 2meters and I think that you will like
the
UHF version. I will look in my Sinclair books and see if I have any info on
them. Send me a fax number and I will fax what info I have on them. If I
dont
I will e-mail you that info also.
Dave
KD4POG

I have found another set that I need to find info on. I have searched the internet but have not come up with much. These are a set of Sinclair ResLock duplexers model Q3220E
**

Jeff.

The Sinclair Q3220E is a 406-512 MHz duplexer. At 5 MHZ separation the isolation is in excess of 80 dB with less than 1 dB insertion loss. The power rating is 350 Watts Temp -40 to +60 degr. Celsius. The dimensions are Height: 4.17" , Width: 19" , Depth: 16.3" , Weight: 15 Lbs.. It has type "N" connectors and will mount in a 19" rack.

Tony .... VE3DWI

The Q3220E is listed as a 4 cavity rack, available in 406-512 MHZ, 350 W,
0.8 dB insertion loss, 5 MHZ minimum seperation, and retails for around
$1015.


-Brian n0pmz



At 07:28 PM 4/26/99 -0500, you wrote:

<excerpt><smaller>Hello All,

Thanks for the replies to my last request for info on the Motorola
cavities. I have found another set that I need to find info on. I have
searched the internet but have not come up with much. These are a set of
Sinclair ResLock duplexers model Q3220E. They are described as 4
cavities built into one physical "rectangle". Present owner used them on
a 440.600 repeater and are supposed to be good to 300 watts.



Does anyone have any info on these units? Anyone with experience with
these? The price seems right but I need more info before I can think of
buying.



Thanks again,

Jeff Weinberg W8CQ

<<mailto:w8cq@...>w8cq@...

</smaller>

</excerpt><<<<<<<<

Test

Hello,

There is a new survey for the Repeater-builder community.

Do the subscribers of this list wish to allow "For Sale" items from E-Bay posted?
This survey is only for E-Bay posted links, and does not apply to personal for sale posts.

----

Possible answers are:

o Yes
o No


To vote, please visit the following web page:




Thanks!

Repeater-builder Owner

Hello,

There is a new survey for the Repeater-builder community.

Do the subscribers of this list wish toallow "For Sale" items from E-Bay posted?
This survey is only for E-Bay posted links, and does not apply to personal for sale posts.

----

Possible answers are:

o Yes
o No


To vote, please visit the following web page:




Thanks!

Repeater-builder Owner