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Mastr II Cos question
Kevin K. Custer W3KKC
Hello all,
On the GE conversion site I sponsor on rbtip I have information on the conversion of the Mastr II. A while back someone told me that the information on the cos that is suggested for use is not really the best one to use. I believe the gent said the rus or rui line is a better place because it follows the Channel Guard and also has some hysteresis built in when mobiles are in flutter. What's the consensus? What is the pin number for RUS or RUI, or what ever the hell it's called? I did not originally build the GE Mastr II conversion site on my server, I inherited it. I am not real well versed on the GE stuff, but I would like to update this info to be more correct. I have done several conversions (long ago) on Mastr II's and I don't even remember what I used. Thanks, Kevin |
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Re: Remote Sites
Patrick Nicholson
Hi,
I will let you know if anyone comes up with a good inexpensive solution! There are several ways to do it, but I am hoping I can find a way to keep everything on one frequency, isntead of going cross-band. At 09:05 AM 3/24/99 -0800, you wrote: From: Cristobal Inos <soni@...>------------------------------------------------------------------------> Ideas on how we can improve ONElist? ------------------------------------------------------------------------> This list is sponsored by the owners and users of "RBTIP"
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Remote Sites
Patrick Nicholson
Hello,
I have a repeater system consisting of a Yaesu VXR5000 UHF repeate and a Computer Automation Technology CAT300 controller. I have the repeater at a church in my city.. The coverage is not that great, and I would like to expand it. I am seeking advise on what I need to do. I live south of Seattle, WA. I have located a nice places for a remote site there, this would allow my group to communicate between the counties and cities inbetween. I am not sure how to link the systems so that they are on the same freq. I was thinking about putting two mobiles and a controller at the other site, and using a different PL. That way, when users move out of range, they can switch PL's and gain access. I have a yaesu and ADI mobile rig, and a handheld controller to do this with. Thanks, Pat N7WGR |
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Mitrek repeater conversion
Hi All,
I have several Mitrek VHF radios I would like to convert to repeaters. I have searched the NET, and have found 3 different version of the conversion instructions. I am sure out of all the people who frequent this list, that all of the different conversion instructions have been attempted, so I am hoping any one who has done it, if you could advise me which one or ones worked, and if you attempted a conversion and it didn't work, I would certainly like to know which one or ones didn't work. If you have any links to sites either way, I would certainly appreciate thier address or link. Thanx Mike |
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Re: Remote Sites
In a message dated 3/23/1999 4:59:54 PM Eastern Standard Time,
patrickn@... writes: << Hello, I have a repeater system consisting of a Yaesu VXR5000 UHF repeate and a Computer Automation Technology CAT300 controller. I have the repeater at a church in my city.. The coverage is not that great, and I would like to expand it. I am seeking advise on what I need to do. I live south of Seattle, WA. I have located a nice places for a remote site there, this would allow my group to communicate between the counties and cities inbetween. I am not sure how to link the systems so that they are on the same freq. I was thinking about putting two mobiles and a controller at the other site, and using a different PL. That way, when users move out of range, they can switch PL's and gain access. I have a yaesu and ADI mobile rig, and a handheld controller to do this with. Thanks, Pat N7WGR >> I would consider using either some older mobiles, such as the Master II, Exec II, Micor and Mitrek, one UHF and the Other another band, and set up a Crossband repeater. This would listen on the current input on UHF, and retransmit it on the other band to the repeater site, where there would be a reciever. You will most likely have to use a voter/comparator of some sort so that the UHF repeater can decide which reciever to make active. I am sure someone else has a better idea, but this is how I would do it. Mike |
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Re: GE MASTER II DC control Card
edriddle
if you will contact gene diehl telephone 219 495 5715 he will sell you a
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complete master II for 45 dollars plus shipping which will have everything you would need to repair yours for a long time. he may have parts , you will have to check him. his email was and may still be n9lcf@... 73 ed n4ale At 01:40 PM 3/23/99 -0600, you wrote:
From: KF4TNP <Bug1@...> |
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Re: M400
tom oliver
I have done maratrac's with the m 400 software and no special keystrokes
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were required to take them into the ham bands just direct entry. tom n8ies Jim Horvat wrote: From: Jim Horvat <w8wrp@...> |
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Re: A Challenge.. / and another with a Mitrek
Alex Groza
Are the Red/Black wires still connected to the TX relay at the antenna
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connector? They should be cut. mch wrote: From: mch <mch@...>I wrote (originally):Then Joe Orrico WB6HRO wrote: |
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Re: A Challenge.. / and another with a Mitrek
mch
I wrote (originally):Then Joe Orrico WB6HRO wrote: But how would a receiver connected to an IFR differ in voltage from a receiver connected to a duplexer? In case I gave the wrong impression, the unit is still at the repeater site - the only change is that the RX antenna was 'pulled' from the duplexer and plugged into the IFR. The TX is still connected to the duplexer, and the power (both TX and supply) is exactly the same. It's as if the duplexer is severely mis-tuned. And since I didn't mention this either, it works flawless on a Mastr-II - RX sensitivity is great both direct and through the duplexer, so the duplexer is tuned correctly. (In fact, it has never been changed from the factory) I will check the voltages, though. The only problem is that the troubleshooting must be done at the repeater site. The duplexer is the one in normal use. This is almost like reverse desense - perhaps there was a slight spur when the TX was inactive that severely desensed the RX??? I didn't check that. Thanks for the response, Joe, KR3P |
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Re: Squelch on GE Mastr II
mch
There are jumper changes when you install/uninstall a CTCSS board. I
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know one is on the front/left side of the system board (with the handle facing you). That is the PTT control jumper that selects normal PTT vs Delayed PTT. With the jumper in the 'CTCSS' position, the unit will not transmit (using the PTT line) without the CTCSS board actually being in the unit. If you jump 10V to the oscillator control, the unit will TX anyway and this jumper doesn't apply since that point is after the jumper. I don't recall where the others are offhand. I don't have the manuals at home. Check the voltages at the points labeled RX MUTE - that's on the connector on the system board that is on the extreme right. SQ Disable should only disable CTCSS and should not itself open the squelch but RX MUTE will open the squelch. When squelched, RX MUTE is a logic low (0V). One word of caution if you don't already know - the label on that connector (J903?) is *usually* offset a little from the pins, so make sure you are looking at the correct pin. Well, back on topic, the unit should not open squelch just due to the removal of the CTCSS board. Unplug the board - the RX becomes CSQ with no jumper changes necessary. The RX MUTE (NOT CAS) will even work as a CSQ unit. Of course, CAS always follows the receiver regardless of CTCSS presence. Does the unit receive on the selected frequency? OH! Check your 10V supply! That could open the squelch. It has to be 10V +/- a few hundredths. I want to correct something I said earlier. I believe an *internal* squelch WAS an OEM option on a Mastr-II. It was rare, but I think I do remember seeing a unit that had one. The only control on the C/HD was volume and on/off. Ed Bathgate, RMA Repair Dept x8785 wrote:
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Re: Squelch on GE Mastr II
edriddle
the squelch circut is all ready there. you merely need to put in a pot to
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set it 73 ed n4ale look at the ge page on the internet and it will tell you where and how. At 04:11 PM 3/22/99 -0500, you wrote:
From: "Ed Bathgate, RMA Repair Dept x8785" <ed@...> |
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Re: Squelch on GE Mastr II
Ed Bathgate, RMA Repair Dept x8785
This is a mobile Mastr II, low band 48mhz. I have the
control head, and the squelch control changes a voltage on the plug in panel test point, but the receiver stays un squelched. I am assuming that an RF squelch was disabled if this unit was on a PL tone, is there a wire or jumper to disable the squelch? Ed N3SDO Ed Bathgate RMA Dept (724) 772-8785 pager (412) 649-6773 |
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Re: Squelch on GE Mastr II
KF4TNP
you can purchase one or build your own take a look at the NHRC web page
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under master II info Ed Bathgate RMA Repair Dept x8785 wrote: From: "Ed Bathgate, RMA Repair Dept x8785" <ed@...> |
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Re: Squelch on GE Mastr II
mch
If you mean a squelch operated relay, it was an option on the base
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units. You can hear that relay trip hundreds of feet away from the unit. If you mean an internal (to the drawer unit) squelch, I think there may have been one, but it is really easy to build - just use a 10K pot with the ends tied to Vol-SQ hi and low respectively, and the center tied to the point marked Squelch Arm. There is a company that sells plug in boards for the M-II mobile (or base, I guess) that has both the squelch and audio pots mounted. See: I haven't used that module myself. I prefer multi-turn pots in the squelch circuit for additional control (accuracy). Joe, KR3P (also near the 'Burgh) Ed Bathgate, RMA Repair Dept x8785 wrote:
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Down Time
Kevin K. Custer W3KKC
All subscribers,
Please be advised of the scheduled down time tonight. Kevin Custer W3KKC List Owner From: ONElist Tech Support Hello, The ONElist system will be down for scheduled maintenance this evening, Monday March 22, 1999. We will be off-line from 8pm to 10pm Pacific Time while we upgrade the system. That's 11pm to 1 am Eastern Time tonight. The ONElist Team |
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