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Search found 1366 matches

by kf4sqb
Sun Aug 02, 2009 9:51 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Maratrac Siren
Replies: 4
Views: 745

Re: Maratrac Siren

Yes, it is usable as a stand-alone unit. For the backlight on the control unit to work, it is usually hooked to the VIP port of a radio's control head. You will simply have to connect the proper connections to +12VDC and ground. Unfortunately, I don't know which connections to use.
by kf4sqb
Sat Aug 01, 2009 9:28 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Fixing cheap battery contacts?
Replies: 8
Views: 530

Re: Fixing cheap battery contacts?

No, it probably won't melt the case, but it also probably won't hold it. See in my first post above, where I said, try putting a small amount of epoxy under it By epoxy, I mean a two-part glue that has to be mixed together before use. I would not recommend something like "JB Weld©", as it ...
by kf4sqb
Fri Jul 31, 2009 4:59 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Fixing cheap battery contacts?
Replies: 8
Views: 530

Re: Fixing cheap battery contacts?

If you can get enough movement to get to the underside of the contact, try putting a small amount of epoxy under it, then press it back in place. Just be careful not to get any epoxy on top of the contact. Try using a rubber band wrapped around the battery, holding down something (like a pencil eras...
by kf4sqb
Mon Jul 06, 2009 2:51 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Help... How to open a Radius SP50 - Sank
Replies: 3
Views: 594

Re: Help... How to open a Radius SP50 - Sank

Take off the battery cover and remove the battery. Look at the bottom of the battery compartment. There is a protrusion that sticks out of the bottom, toward the rear. You should be able to see a split in this protrusion. Slide a thin-bladed screwdriver into the split, and gently pry downward. The i...
by kf4sqb
Wed Jun 24, 2009 1:40 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: GM300 ?what board is the RF board?
Replies: 1
Views: 162

Re: GM300 ?what board is the RF board?

Its the one the two small coaxes coming from the PA section (the heatsink mounted to the rear of the radio) plug into.
by kf4sqb
Wed Jun 24, 2009 1:36 pm
Forum: Vehicle Warning Equipment Discussion
Topic: Siren Speaker for Testing
Replies: 11
Views: 5927

Re: Siren Speaker for Testing

Radio Shack part numbers: 271-120 8ohm/20W NI resistor $2.49each OK, I stand corrected on availability. They look like a wire-wound to me, but I guess appearances can sometimes be deceiving. On a side note, you won't be able to speak any language but English through the PA with it hooked to a circu...
by kf4sqb
Tue Jun 23, 2009 5:08 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Isolating 2m/70cm across the base insulator of an HF antenna
Replies: 5
Views: 412

Re: Isolating 2m/70cm across the base insulator of an HF antenna

Robert, I'm not saying that what you want to do can't be done, just making sure you're aware of at least some of the possible problems. I understand that commercial broadcast companies do, more or less, the same thing you want to do, but their systems were also designed by RF engineers, and built wi...
by kf4sqb
Tue Jun 23, 2009 3:09 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Isolating 2m/70cm across the base insulator of an HF antenna
Replies: 5
Views: 412

Re: Isolating 2m/70cm across the base insulator of an HF antenna

I don't know if I would want to try that. By isolating the V/U antenna, you've just made it into a lightning magnet. With it isolated, it will no longer be DC grounded, and any near-by lightning strike will very possibly induce a large enough voltage into it to cause serious damage to your equipment...
by kf4sqb
Tue Jun 23, 2009 2:57 pm
Forum: Vehicle Warning Equipment Discussion
Topic: Siren Speaker for Testing
Replies: 11
Views: 5927

Re: Siren Speaker for Testing

One thing to remember if you try Jackhackett's design is that all resistors have to be, as Jack said, non-inductive . This means that they can not be wire-wound. 20 watt, non-inductive resistors may be a bit hard to find, and may be a little expensive, but Jack's circuit is a proven concept. There a...
by kf4sqb
Mon Jun 22, 2009 1:43 pm
Forum: Vehicle Warning Equipment Discussion
Topic: Siren Speaker for Testing
Replies: 11
Views: 5927

Re: Siren Speaker for Testing

Try putting a regular siren speaker inside a small box, then pack the small box inside a larger box with styrofoam peanuts, or perhaps foam rubber. You might have to "layer" several boxes this way, but you should be able to get the volume down to a "comfortable" level in this way.
by kf4sqb
Mon Jun 22, 2009 1:32 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Maratrac no audio
Replies: 6
Views: 702

Re: Maratrac no audio

Which control head do you have on it, clamshell or A7? If it's the A7, it uses an electronic step-attenuator inside the head to control the volume. This step-attenuator uses a separate +9VDC regulator circuit for it's power supply. As best as I can remember, this 9V regulator supplies the volume con...
by kf4sqb
Mon Jun 22, 2009 1:14 pm
Forum: Radio Programming
Topic: X9000 lowband programming issue
Replies: 4
Views: 458

Re: X9000 lowband programming issue

TWEMARS wrote:Actually, FAIL 01/90 also indicates that there is no voltage on the big red A lead to the radio.



That would kind of preclude the control head's processor talking to the radio's processor, now wouldn't it? FAIL 01/90 means, per the service manual, "serial bus failure".
by kf4sqb
Fri Jun 05, 2009 4:57 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Spectra High-power/ABS system interference
Replies: 14
Views: 847

Re: Spectra High-power/ABS system interference

If moving the antenna doesn't solve your problem, you may be able to get some relief by adding a few ferrite beads to the outside of the coax.
by kf4sqb
Sat May 16, 2009 8:29 am
Forum: Radio Programming
Topic: X9000 lowband programming issue
Replies: 4
Views: 458

Re: X9000 lowband programming issue

Have you used the RIB on any other radios? Have you used the X9000 programming cable on any other X9000's? 01/90 means that the control head's microprocessor can't communicate with the radio's microprocessor. Have you checked for missing/bent/broken pins/contact sockets in the programming cable? Is ...
by kf4sqb
Fri May 08, 2009 5:58 pm
Forum: Radio Programming
Topic: Smoke from my rib!
Replies: 8
Views: 895

Re: Smoke from my rib!

An MSS local to me fried an Astro Spectra, a Moto RIB, and a computer, all at the same time, several years ago. They always put a trickle-charger on a vehicle's battery while doing installs, to keep from running the battery down from trunk/underhood/interior lights being on for hours at a time. The ...
by kf4sqb
Sat May 02, 2009 2:25 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Poor receiver sensitivity in System Saber III
Replies: 2
Views: 279

Re: Poor receiver sensitivity in System Saber III

Thanks, Dave, but I think I've already found the problem, and I really, really felt stupid when I did. I had it hooked up to a computer last night making some programming changes anyway, so I decided to check the alignment pages while I was already hooked up. I turns out that a previous owner (the r...
by kf4sqb
Fri May 01, 2009 12:33 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Poor receiver sensitivity in System Saber III
Replies: 2
Views: 279

Poor receiver sensitivity in System Saber III

I have a VHF Systems Saber III with poor RX sensitivity. All the channels are well within the split of the modules in it. Unfortunately, I don't have access to the proper test equipment, so I can't give any specific numbers for the sensitivity, but I do know there is a problem. When a P1225 and a Ma...
by kf4sqb
Sat Apr 18, 2009 6:50 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Replacing noise cancelling mic element with one that isn't
Replies: 5
Views: 615

Re: Replacing noise cancelling mic element with one that isn't

The mic element is not noise canceling, the radio housing provides the noise canceling thru a second audio port. The elements are the same. Will, all of the noise canceling mic elements I've ever seen are made slightly different from "normal" ones. The radio housing does have a second aud...
by kf4sqb
Thu Apr 09, 2009 7:02 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Maratrac Troubleshooting...
Replies: 9
Views: 708

Re: A2 Clamshell w/ A7 Maratrac? (And transmit issue...)

Also, what are the differences between the HCN1089A and HCN1052A control heads? I don't know the exact difference, but they are both "A7" heads. At a guess, I would say they either re-designed part of the internal circuitry, or else changed from DIP construction to SMD construction. I'm p...
by kf4sqb
Thu Apr 09, 2009 5:58 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Maratrac Troubleshooting...
Replies: 9
Views: 708

Re: A2 Clamshell w/ A7 Maratrac? (And transmitt issue...)

Was it a bad idea to use the A2 clamshell on the A7 radio? Unlike the Spectra, the "A7" in the Maratrac model number doesn't denote which head it takes. Any Maratrac is compatible with any Maratrac head, with the exception of the A7 head that came with low-band radios, which has a squelch...
by kf4sqb
Fri Apr 03, 2009 1:38 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Maratrac Won't Transmit
Replies: 3
Views: 521

Re: Maratrac Won't Transmit

Try jumping pins 20 and 37 of the VIP port.
by kf4sqb
Thu Mar 26, 2009 4:34 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: RF Power Transisters - Cross Reference Part#'s
Replies: 8
Views: 588

Re: RF Power Transisters - Cross Reference Part#'s

Sorry, but those still aren't industry-standard numbers. Most industry-standard numbers will have prefixes like, "2SC", "2N", "MRF", "TP", etc. I would have to think that your best bet would be someone with a MOL account. They might be able to look up what equ...
by kf4sqb
Wed Mar 25, 2009 7:12 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: RF Power Transisters - Cross Reference Part#'s
Replies: 8
Views: 588

Re: RF Power Transisters - Cross Reference Part#'s

If I'm not badly mistaken, all those numbers are internal Motorola numbers, not industry-standard numbers, and won't cross via "regular" means. Are these loose parts you have, or are they in a piece of equipment? If in a piece of equipment, someone may be able to help you by having some in...
by kf4sqb
Wed Mar 25, 2009 7:00 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Motorola Syntor X 9000 PAC-RT
Replies: 3
Views: 571

Re: Motorola Syntor X 9000 PAC-RT

If I understand you correctly, you have another X9000 that's in working condition. Try putting the head from your recently acquired unit onto your existing unit, and try it. You won't need to reprogram anything; the mode names won't be correct, but it doesn't matter for the purpose of this test. If ...
by kf4sqb
Wed Mar 25, 2009 6:39 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Pinouts for Microphone CDM1250
Replies: 5
Views: 3114

Re: Pinouts for Microphone CDM1250

jackhackett wrote:Nope... 9 is next to 8, 10 is next to 1.


Now that just doesn't make any sense, but,:

jackhackett wrote:Hey, it's Motorola... it doesn't have to make sense!


How very, very true!!! :o
by kf4sqb
Wed Mar 25, 2009 5:42 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Pinouts for Microphone CDM1250
Replies: 5
Views: 3114

Re: Pinouts for Microphone CDM1250

If you use an 8 pin plug and cable (which is a lot easier to come by than 10) the connections are the same. Very true, but I was operating under the assumption that he would possibly want to make an internal connection to the mic plug to extract TX audio. However, it certainly may be easier to make...
by kf4sqb
Tue Mar 24, 2009 5:46 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Pinouts for Microphone CDM1250
Replies: 5
Views: 3114

Re: Pinouts for Microphone CDM1250

http://www.batlabs.com/images/maxrad.gif That is the mic plug pinout for the older Radius and Maxtrac mobiles, and should be the same for the Waris mobiles. One thing to remember is that the Waris mobiles actually use a ten-pin connector, while the older Radius and Maxtrac used an eight-pin. This m...
by kf4sqb
Sat Mar 21, 2009 4:11 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: NMN6217 speaker mic for use on a analog saber
Replies: 9
Views: 722

Re: NMN6217 speaker mic for use on a analog saber

The pinouts are the same, but I don't know about the option sense circuit (whether or not it uses the same voltages). I'd be interested in knowing if they are interchangeable or not myself. Has anyone ever tried to remove the antenna nut out of one of these before? How much trouble is it?
by kf4sqb
Fri Mar 20, 2009 4:33 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: maratrac question
Replies: 1
Views: 198

Re: maratrac question

1. Can this radio be programmed to scan all channels that are programmed into it? With a clamshell head, it can be programmed for 8 channels with scan, or for two banks of 8 channels with no scan. It doesn't matter what label is on the second knob (the one labeled A/B on your head), the "zone&...
by kf4sqb
Sat Mar 14, 2009 11:45 am
Forum: Vehicle Radio Installs
Topic: power for multiple radio install
Replies: 16
Views: 3528

Re: power for multiple radio install

Starter solenoids are not rated for continuous duty and many will over heat if left keyed for long peroids of time. One of the trucks at a volunteer FD I'm a member of has a pair used for battery switching. Perhaps the people at Ward LaFrance aren't aware they aren't usable for continous duty? Did ...
by kf4sqb
Sat Mar 14, 2009 5:57 am
Forum: Vehicle Radio Installs
Topic: power for multiple radio install
Replies: 16
Views: 3528

Re: power for multiple radio install

The first two to reply both have valid points, but to simplify, put it all on a relay. The quickest, most reliable way to do this: Go to your local parts store, hope you get a semi-intelligent person behind the counter, and tell them you want an old-style Ford starter solenoid. A switched circuit fr...
by kf4sqb
Fri Mar 13, 2009 8:16 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Maratrac problem
Replies: 5
Views: 357

Re: Maratrac problem

Thanks, Jack. I think I have a few 2816 EEPROM's floating around here. I may try replacing it with one of those.
by kf4sqb
Thu Mar 12, 2009 5:42 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Possible serious problem with Pierce fire apperatus!
Replies: 2
Views: 460

Possible serious problem with Pierce fire apperatus!

First off, Mods, I know this is off topic, and not at all what this board is for, but I know there are a lot of firefighters on the board, and it seems like a good place to warn of a possible serious problem. Feel free to lock this if you want, as long as its left up so it can be read. Now, to the p...
by kf4sqb
Thu Mar 12, 2009 5:12 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Maratrac problem
Replies: 5
Views: 357

Re: Maratrac problem

Jack, you are correct in assuming the early Maratrac used the Dallas chip like the early Maxtrac. The unit in question does indeed have a Dallas chip in it. Do you know of any way to check the internal battery? I don't see any way from the chip's datasheet. It almost certainly does have at least 10 ...
by kf4sqb
Tue Mar 10, 2009 3:38 am
Forum: Computer/Technical Assistance
Topic: laptop hard drive recovery
Replies: 7
Views: 2542

Re: laptop hard drive recovery

Another option can be found here . These units are great if you do (or expect to do) a lot of this kind of thing. Best thing about this unit is that it will work with everything (standard IDE, laptop IDE, and all SATA drives) but SCSI. I've had one of these for a little over a year now, and it works...
by kf4sqb
Sun Mar 08, 2009 9:18 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Maratrac problem
Replies: 5
Views: 357

Re: Maratrac problem

Intriguing possibility. I'll check that out, but I kinda' doubt that's the problem, as I read the radio before reloading the codeplug, and all the data appeared intact. I'll still check it out, though.
by kf4sqb
Sun Mar 08, 2009 7:38 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Maratrac problem
Replies: 5
Views: 357

Maratrac problem

I've encountered a VHF high-band Maratrac with an A7 head that has developed a strange problem after being stored for a while. The radio was working when last used, app. 3.5-4 years ago, and has been laying unused (in a sheltered environment), since. Hooked the radio up and tried to power it up toda...
by kf4sqb
Sat Mar 07, 2009 6:45 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: HKN4376B X9000 Rear Head Cable.. Info Needed.
Replies: 4
Views: 520

Re: HKN4376B X9000 Rear Head Cable.. Info Needed.

Scott, I have (somewhere) a dual-head T-cable, but the chances of me finding it anytime soon are pretty slim. If memory serves, the only difference between the rear head cable and the regular cable is that the rear head cable doesn't have the orange and green ignition wires on the head end (and the ...
by kf4sqb
Fri Feb 27, 2009 6:16 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: M1225 model decode help needed
Replies: 7
Views: 723

Re: M1225 model decode help needed

...but beware that the radio will go into transmit as soon as you slide the connector into the Mic. receptacle. I've personally never run into that problem (not saying it doesn't exist, just that I've never run into it). Perhaps because I always power the radio off before plugging in or unplugging ...
by kf4sqb
Sun Feb 22, 2009 4:42 pm
Forum: Computer/Technical Assistance
Topic: System 32 errors and or removal
Replies: 3
Views: 1526

Re: System 32 errors and or removal

While viewing the contents of the system32 folder, click on the tools menu at the top of the window, then click the folder options selection. Click on the view tab at the top of the folder option window, then look down until you find the hidden files & folders selection, and make sure the "...
by kf4sqb
Sun Feb 22, 2009 8:20 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: M1225 model decode help needed
Replies: 7
Views: 723

Re: M1225 model decode help needed

All I can tell you for sure is that its a 40 watt, UHF, four channel. I'm not sure about the capability of the UHF to go to Ham frequencies. If you're using an older version of software (up to 3.1), you should be able to hold down the shift key on the computer's keyboard while entering the frequency...
by kf4sqb
Sat Feb 21, 2009 7:04 pm
Forum: Radio Programming
Topic: M1225 programming problem wont read
Replies: 8
Views: 873

Re: M1225 programming problem wont read

The older 1225 software (through 3.2, IIRC) will run under Windows 3.1 (I think you have to add a few files to that version of Windows for it to work correctly), Windows 95 (again, you may have to add a couple of files, they are included on the RSS install disk), Windows 98, and Windows ME. Will NOT...
by kf4sqb
Fri Feb 06, 2009 7:38 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Info needed on dual 1/4 inch jack recepticle for headsets
Replies: 9
Views: 572

Re: Info needed on dual 1/4 inch jack recepticle for headsets

Jim, I've got a pair of what you're talking about. Make me an offer.
by kf4sqb
Tue Jan 27, 2009 6:04 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Centracom parts
Replies: 1
Views: 326

Centracom parts

I've recently acquired the "furniture" for a Centracom Series II console, which I intend to use as a platform to set up all my radio gear for my Ham shack. I'm not interested in trying to create a "dispatch" type of setup, just using the cabinets to house radio equipment. There w...
by kf4sqb
Mon Jan 26, 2009 7:00 pm
Forum: Radio Programming
Topic: Syntor X controll head
Replies: 3
Views: 213

Re: Syntor X controll head

I don't have a manual for the Syntor X radios, but, if memory serves, you won't have to make any programming changes to swap heads. The repeat/direct switch, if memory serves (again), is nothing more than a "zone" selector, which can give 16 channels (two banks of 8). The idea is to progra...
by kf4sqb
Sun Jan 18, 2009 3:10 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: SVA service info needed
Replies: 3
Views: 179

Re: SVA service info needed

Tom, thanks for the offer, but I've got it taken care of. Found that one of the PNP TO220 transistors in the amp was blown. I'm pretty sure I also found out why it blew in the first place. I had it mounted with a metal bracket (bracket from an old-style, metal cased Moto speaker), and either by desi...
by kf4sqb
Fri Jan 16, 2009 8:27 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: SVA service info needed
Replies: 3
Views: 179

Re: SVA service info needed

OK, scratch that. Stupid me wasn't paying attention to what I was doing, and was using unshielded leads on my signal tracer. That's why the audio sounded muddy out of the back of the SVA. Using shielded input leads, the output of the SVA is clean. The problem is definately in the amplified speaker. ...
by kf4sqb
Fri Jan 16, 2009 7:46 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: SVA service info needed
Replies: 3
Views: 179

SVA service info needed

i have an NTN5487 SVA here with audio problems, and need a schematic for it for troubleshooting, or some advice from someone who has seen this problem before. The audio out of the accessory connector pins 20 & 21 is "muddy". Sounds for all the world like a blown speaker, but it does it...
by kf4sqb
Wed Dec 24, 2008 2:06 pm
Forum: Radio Programming
Topic: RSS Defaults
Replies: 5
Views: 362

Re: RSS Defaults

You should be able to set the COM port, and have it stay where you put it. What RSS package, specifically, are you having trouble with? If I knew, I may be able to give you step by step instructions.

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