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Search found 1630 matches

by Nand
Sun Nov 22, 2015 3:56 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: MSF5000 2 Meter Issues
Replies: 2
Views: 1193

Re: MSF5000 2 Meter Issues

There is no cheap way to get a repeater working well. Fiberglass antennas are not suitable for repeater use and a VHF / UHF combination antenna is a no no. The antenna you indicate is advertised as a base antenna. This does not mean that it is suitable for repeater use where the receiver is listenin...
by Nand
Fri Apr 06, 2012 7:36 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Maxtrac tuning data
Replies: 11
Views: 1660

Re: Maxtrac tuning data

A VHF radio here has the label with H 260 3929.

Nand.

P.S.: Hi Bob.
by Nand
Tue Apr 03, 2012 2:37 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Maxtrac tuning data
Replies: 11
Views: 1660

Re: Maxtrac tuning data

Second 7 is likely a 4

Nand.
by Nand
Thu Nov 19, 2009 7:00 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: NI-MH batteries in Minitor 3
Replies: 5
Views: 805

Re: NI-MH batteries in Minitor 3

I was told that NI-MH batteries have a lower internal resistance that Ni-Cad cells when discharged. This will cause them to draw a higher initial current when put in the charger and likely blow open the LED that is in series with the cells.

Nand.
by Nand
Sat Oct 18, 2008 6:50 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Repeater cable using CDM radios.
Replies: 5
Views: 2998

Repeater cable using CDM radios.

http://domtoren.com/990/CDM%20_Repeater_Cable.jpg Here are instructions for building either uni- or bi-directional repeaters with CDM type radios like the CDM750. There are no external component used other than some wires and connectors as shown. Two Motorola part number HLN9457A accessory terminal...
by Nand
Tue Feb 26, 2008 7:45 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Motorola Brochures for old radios
Replies: 20
Views: 2163

Re: Motorola Brochures for old radios

http://domtoren.com/990/Motorola_CB_Tranceiver.pdf

A 6 meg PDF file with all Motorola CB equipment dated January 1979.


Nand.
by Nand
Sun Feb 18, 2007 9:20 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Maxtrac Won't Power Up
Replies: 8
Views: 656

The first check I do for a Maxtrac that doesn’t receive is to check the second oscillator xtal. Placing a service monitor probe near the xtal shows the xtal to be either running or not. Often this is the cause of a bad receiver.

Nand.
by Nand
Sun Feb 18, 2007 9:50 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: IS a Combiner the same as a Duplexer???????NEED HELP ASAP!!!
Replies: 19
Views: 1521

Its an old style Sinclair hybrid coupler.

The HT-150 is an old style hybrid coupler. It combines two high power TX signals into a sigle output port. There are two transmit input ports, a dumpy load port and an output (antenna) port for a total of four ports. The dummy load dissipates half the TX power (3 dB). More elaborate configurations i...
by Nand
Wed Jan 31, 2007 5:46 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Motorola Micor Digital Modulator Module
Replies: 9
Views: 636

This board is mostly a level shifter that allows the TX channel element to be modulated (frequency shifted) by a DC coupled square wave. The controls set the positive and negative deviation levels. When the board is disabled (no enable signal) the TX crystal runs on its tuned frequency. There is a s...
by Nand
Mon Dec 26, 2005 7:36 am
Forum: Radio Programming
Topic: Help with Com Port on Toshiba....
Replies: 5
Views: 1213

by Nand
Mon Dec 19, 2005 10:42 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: IntelliRepeater info
Replies: 7
Views: 880

It is pretty near impossible for an IR system to completely fail. In a multi repeater system anyone of the repeaters assigned as possible control channel can assume the control channel function and take over from a failing station. It even is possible for a control station to revert to just a voice ...
by Nand
Sun Dec 18, 2005 5:22 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: HT1000 'A' to 'B' revision "remote" upgrade
Replies: 7
Views: 842

This is not necessarily what you are looking for, but is interesting just the same. Using the cloning cable, one can clone an A or a B version radio into a C or D version radio. If the A or B version is a 16 channel model and the C or D is only 2 channel model, the 2 channel model will now be 16 cha...
by Nand
Sat Dec 17, 2005 9:05 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: MSF 5000 RX and TX VCO Voltage?
Replies: 2
Views: 325

The Motorola test set for tuning the MSF5000 mostly consists of a 50 uA meter and a selector switch. The RX and TX metering connectors on the front of the RF tray give you access to the required metering points. Pins 6,7 and 8 are grounded internally. Pin 5 is the VCO line to measure with a 50 uA me...
by Nand
Tue Dec 13, 2005 2:33 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Which it is the last one release for MCS2000
Replies: 2
Views: 357

Version 1.13 Part# RVN4175P as of July 2005 is the latest.

Nand.
by Nand
Mon Dec 12, 2005 5:36 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Programming M1225's
Replies: 7
Views: 846

I believe version 4 is free for those that have a license for version 3.2.

Nand.
by Nand
Mon Dec 12, 2005 5:29 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: HT1250 "Local beep when waiting for repeater"?
Replies: 11
Views: 1412

It seems that you are looking for the beep that indicates that the repeater is free after the end of someone’s transmission. This often is called a courtesy beep. It is a function of the repeater and not the radio. Some repeater controllers can provide this feature.

Nand.
by Nand
Sun Dec 11, 2005 5:22 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Maxtrac/CDM horn-Lights Output or other switching ouputs?
Replies: 2
Views: 389

The standard alarm output (typically pin 4) does not provide latching. It only provides a timed output. The alarm can be programmed in some models to be automatically (permanent) or manual rearmed. This feature will work with QCII, MDC1200 and DTMF as posted by nmfire10 in CDM and some Maxtrac like ...
by Nand
Sun Dec 11, 2005 4:34 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: ht1000 rear chassis swap and transmit light
Replies: 4
Views: 454

Changing the frame is an easy task, but you MUST use caution when removing the side flex as it is adhered to the frame and does NOT come off easily, if force is used, you will damage the flex and the radio will be useless until it is replaced. If you mean the control flex, it is not attached to the...
by Nand
Sun Dec 11, 2005 4:29 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: ht1000 rear chassis swap and transmit light
Replies: 4
Views: 454

The red/green LED is likely a problem with the flex connector or flex in the lowest part of the radio. Check for water damage or physical damage. The connector solder joints may be broken.

Nand.
by Nand
Sun Dec 11, 2005 4:23 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: ht1000 rear chassis swap and transmit light
Replies: 4
Views: 454

The newer frames (same part number as the older U6 ones) have a built up board-locating pin near the top of the frame. If your RF board does not have a slot for it, but a small round hole instead, then the board needs to be modified so it can lay flat. There is a Motorola tool and jig available to c...
by Nand
Sun Dec 11, 2005 4:06 pm
Forum: Radio Programming
Topic: CDM1550 Programming Help
Replies: 11
Views: 2016

As it is right now, you transmit the signalong every time you press the PTT without being able to get a word in. Instead, press the PTT and hold it in. The radio should produce a side tone (if enabled) while to page signaling transmits. When the side tone stops, it is your turn to speak the message....
by Nand
Sun Dec 11, 2005 3:58 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Phone Patch ???
Replies: 16
Views: 1239

There may be a minimum tone length needed for the first tone or tone pair in order to prevent the patch from coming on by itself with voice. In other words, there may be a timing issue.

Nand.
by Nand
Sun Dec 11, 2005 7:19 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: GM300 question
Replies: 2
Views: 650

All GM300 radios have the 16-pin connector and all of them have a COR output pin. This is programmable on the 16-channel models. It is a fixed active low open collector signal on the 8-channel model for pin 8. Your model number is for an 8-channel radio. Realize that the GM300 receiver has a wide ba...
by Nand
Mon Nov 28, 2005 8:14 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Oscillating Channel Element On Micor 110 watt VHF Repeater
Replies: 4
Views: 610

It may depend on how the station is configured or reconfigured. Personally I prefer the xtal to be oscillating all the time since it will be stable and on frequency when the transmitter keys up instead of shifting (drifting) a couple of 100 Hz on frequency. This doesn’t mean that it couldn’t be caus...
by Nand
Sun Nov 27, 2005 6:03 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Firmware
Replies: 12
Views: 1293

faq.php#3

Nand.
by Nand
Sun Nov 27, 2005 5:50 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Power Supply - 110 watt Micor VHF Base Station/Repeater
Replies: 1
Views: 392

I suggest that the group just remove the supply from the cabinet before the move and make a second trip for the supply and perhaps a third trip for the front and rear doors. You can even remove the PA and make a fourth trip. The standard supply has two 12 volt and one 9.6 volt output. One of the 12 ...
by Nand
Sun Nov 27, 2005 4:24 pm
Forum: Motorola Digital and Voice Paging
Topic: Cheap Voice paging, help.
Replies: 1
Views: 556

Many full-featured Radius mobiles, Maxtracs, GM300 and newer radios can be programmed to do Two-Tone paging either on simplex or through a repeater. If you have one of these models, then that would be the cheapest way to go short of whistleling the tones yourself.

Nand.
by Nand
Sun Nov 27, 2005 11:38 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Repeaters - What do we really need?
Replies: 17
Views: 2181

Yes, this will allow both repeaters to be used at the same time without causing any interference from one to the other one. Using two antennas often produces problems that are difficult to circumvent since the coupling between the two systems in not fixed. A single antenna in a multi-repeater system...
by Nand
Sun Nov 27, 2005 7:26 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Repeaters - What do we really need?
Replies: 17
Views: 2181

A single site is the cheapest since it only requires one antenna, one feed line and one duplexer. Go for the highest site central to your coverage area. The repeater transmitters can be coupled together with a hybrid combiner (Sinclair TC-2112) and fed to the TX side of the duplexer. This is needed ...
by Nand
Fri Nov 25, 2005 1:31 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: ht750 tx problem
Replies: 3
Views: 420

I have seen cases where the emitter joint of the PA (the whole bottom of the PA) was intermittent. Resoldering cured it.

Nand.
by Nand
Wed Nov 23, 2005 7:03 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: ht1000 speaker
Replies: 8
Views: 530

You may also let us know if the volume control at least has a bit of control. If not, the volume control flex may be in trouble. Additionally, shake the radio and listen if there is something rattling inside. With the older models, a locating pin in the top of the frame sometimes breaks when dropped...
by Nand
Wed Nov 23, 2005 2:52 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: CDM1250 repeating power-on beep, non-functional
Replies: 17
Views: 1489

Simple, just read this section from the manual below on a day that you don’t suffer from a headache already. The On/Off/Volume knob, when pressed, switches the radio’s voltage regulators on by connecting line ON OFF CONTROL to line UNSW 5V via D0821. Additionally, 5V at the base of digital transisto...
by Nand
Tue Nov 22, 2005 4:25 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: CM200 MOBILE PROGRAMMING CABLE
Replies: 3
Views: 2396

The cable is the same as the Maxtrac or GM300 and other Radius mobile cables with a jumper added at the radio end of the cable between the pin 1 and pin 3 of the RJ45. Pin 1 would be the top pin when plugged in a Maxtrac with the RJ45 clip to the right in this example. Some call this pin 8. http://b...
by Nand
Mon Nov 21, 2005 8:44 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: MSF5K 800MHZ Repeater TX problem
Replies: 8
Views: 751

I just remember that I once had a station with a leaking feed through capacitor in the PA. I believe it was associated with a temperature sensor or the power measurement circuitry in a VHF station.

Nand.
by Nand
Mon Nov 21, 2005 8:36 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: tld1694e micor pa
Replies: 4
Views: 509

25 Watts will surely fry the input to the amp. 1 Watt is likely the highest you could go. It is not practical to use a Maxtrac to drive the PA. Not even a low power version. A Maxtrac and similar radios do have a fairly dirty output that first needs to be cleaned up before amplifying. The Micor uses...
by Nand
Mon Nov 21, 2005 7:39 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: tld1694e micor pa
Replies: 4
Views: 509

100 Watt, 162 to 174 MHz Continuous Duty.

The drive is typically 400 mW.

Tuning is done while monitoring pin 5 of the metering connector on the power control board.

Nand.
by Nand
Mon Nov 21, 2005 5:01 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Should my RSS prog. a GR300?
Replies: 4
Views: 930

The ZR310 can be programmed with a special RSS or over the air from a portable. This RSS is not the normal GM300 RSS used for programming the radio. There is a pedefied manual available.

Nand.

Just looking and it looks like the same RSS does program the ZR unit.

Nand.
by Nand
Sun Nov 20, 2005 7:40 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: MSF5K 800MHZ Repeater TX problem
Replies: 8
Views: 751

There are two power resistors in the PA that somehow open their solder joints on the board and do cause a power problem. I noticed this in several ~35 watt MSF5000 800 MHz stations. The resistors are easily seen when the cover is removed while the amp is hinged out. They resistors are located near t...
by Nand
Sun Nov 20, 2005 7:29 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: MDC Stunn/Kill
Replies: 25
Views: 2611

There really is not much you can do without a console that is capable MDC1200 kill. And then this only will work if the radio has MDC enabled and you know the ID that was programmed into the radio. And on top of that, the radio needs to be on in order to receive the kill transmission. If whoever has...
by Nand
Sun Nov 20, 2005 7:41 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: MDC Stunn/Kill
Replies: 25
Views: 2611

Re: MDC Stunn/Kill

We had a portable radio stolen the other day, a HT 1000 and when I called dispatch to see if they could stun the radio they told me they couldn’t do that. (We have ht1250s as well) I know that it can be done what does it take to send the command? I have a full signaling maxtrac and we have some cdm...
by Nand
Sun Nov 20, 2005 6:55 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: MICOR paging transmitter help needed
Replies: 4
Views: 522

I have been offfered a used Paging transmitter. We are currently licensed for 152.0075Mhz. Our encoder is a Zetron DAPT640xtra The unit offered is a Micor digital paging transmitter, wireline control, 157.740Mhz, 100 watt. Model C73RTN or RTA. Can this be modified for splinter channel operation? BT...
by Nand
Sun Nov 20, 2005 6:20 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: corrupted codeplug on GM300
Replies: 2
Views: 468

viewtopic.php?t=11514

See WAVETAR's solution.

Nand.
by Nand
Sat Nov 19, 2005 7:47 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: MDC Stunn/Kill
Replies: 25
Views: 2611

Killing a HT1000 using MDC1200 is not a programmable feature. It is there by default and does work. Typically a console capable of transmitting the kill signal targeting the radio ID, kills the radio. I believe it even works with MDC1200 capable GP300 portables.

Nand.
by Nand
Tue Nov 15, 2005 4:14 am
Forum: Motorola Digital and Voice Paging
Topic: Minitor IV - How do you remove the knobs.
Replies: 1
Views: 617

The knobs stay in the housing. The housing parts do slide apart with great difficulty and while doing so destroy the sealing gasket between the two housing parts.

Nand.
by Nand
Mon Nov 14, 2005 3:46 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Pentium III for gp300, mx3000, mt1000 ect...
Replies: 1
Views: 389

In the BIOS turn off the internal and external cache to slow down the computer. This lets you program these radios fine.

Nand.
by Nand
Sun Nov 13, 2005 7:37 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: CANADIAN MOTOROLA ROGERS MAJESTIC
Replies: 10
Views: 1108

Known Eric personally for over 25 years.

Nand.
by Nand
Sun Nov 13, 2005 7:04 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Solution to RF availability??
Replies: 16
Views: 1175

Without exact information it is a bit difficult to guess correctly what is going on. What puzzles me is that you hear the other party coming through your repeater on the tail only and for the duration of the tail. If the repeater is setup correctly, it will not pass any audio that doesn’t have the c...
by Nand
Sat Nov 12, 2005 1:28 pm
Forum: Motorola Digital and Voice Paging
Topic: Minitor III stopped decoding after programming
Replies: 4
Views: 716

To verify the programming, read a working pager and write this to a not working pager. Perhaps this is how you programmed these in the first place, but it guaranties that they have the correct info in them. Both Min 3 and 4 have problems with solder joints breaking at the decoder IC pins. Applying p...
by Nand
Sat Nov 12, 2005 10:04 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Part# GM300 IF Receiver IC
Replies: 6
Views: 1003

A dead receiver most often is caused by the second oscillator xtal failing. Try to make sure the oscillator is running before replacing the IF IC. With most test equipment you can pick up its 44.685 MHz signal by just touching the xtal housing with a probe. We never had to replace an IF IC in the ma...
by Nand
Sat Nov 12, 2005 7:44 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: OT: astron power supply help needed
Replies: 7
Views: 889

There is no need to test these. When the 2N3771 transistors failed, these resistors failed as well. It is the most common failure with these types of power supplies. But if you like, use the Ohm meter section of the tester you used for measuring voltage. These resistors should measure like a short i...

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