Batboard

57Shasta

You can't change the alert beep, but using the horn alert output, you can trigger another chime or noise maker of your choice>

57Shasta

Antenna Specialist #ASP7495. Good antenna. Wideband and will take a tree limb at 40!

57Shasta

OK let me think about this. If you alert the radius mobile and it flashes "CA", this means call alert. This is used to page a mobile if the the operator is out of the vehicle. It will also set off the the horn alert output to honk the car horn that a call has been received. Your siren is probally ...

57Shasta

The GM-300 should not need a pull-up resistor. As long as you can set a programable pin as cor or cor+pl it should interface to a cat 1000 no problem. If a pin is not programable or you are using an older maxtrac or something like that, I find that that the audio PA enable voltage makes a OK logic ...

57Shasta

Yeah I've went cheap and used DB-25's. They fall out unless you cut them an hot glue them or something.

Call up MOT parts and ask for HLN6412A. You'll get a connector shell and 5(whopee) pins.

57Shasta

Sti-co makes good antennas, however they do have to be tuned which can be tricky. The same with couplers. I have used a mag mount under the vehicle or in a plastic bumper. Not great, but works.

If it's a funky vehicle, a ball mount with a spring (no whip) gives a OK match on UHF.

A half wave ...

57Shasta

Now that's wierd! I have not seen any converta-bomb inject MDC into a portable. Normally the option board would be for the portable and send a burst in or out of the CVC. Pop that puppy open and see if there are any funny SP's in there.

57Shasta

All hail the protection diode!

57Shasta

I'd say also a power drop and then reset. New battery and go after those cr*ppy little power pins with a pencil eraser. Do the pins travel smoothly? Is the gold worn off?

57Shasta

If it is programmed through RSS as user programable, you would press and hold scan until it beeps (a sec or two). Display flashes on and off. Use mode button to step through channels and then press sel to toggle scan member(a little hash mark means it's in the scan list). Press scan again to exit ...

57Shasta

Sounds like you have a remote A5 or A7 Spectra (see Batlabs model decipher page). It is correct to have the DB-15 connector with the single red ignition sense wire. Stock /\/\ cables come with a 4 amp fuse. A remote head plugs into the short pigtail off the head. A dash mount will plug into the rear ...

57Shasta

Before you start tweeking on the coils, take some compressed air and blow out the dendrites that form in the preselector coils. MT1000/HT600 UHF had a problem with this, but not as bad as a 800 Mostar.

57Shasta

Time to break out the Bird 43. Betcha he crimped the mini UHF with vise grips!

57Shasta

Think you need to research exactly what a centracom is and what all the parts and pieces are and what they do. If all you want is something with a lot of buttons that looks impressive, buy it.

By the way, anybody need a complete CCII (ver "A") 2 position wedge? I can't bring myself to take it to ...

57Shasta

Try This...

http://comtekk.us/tone-generator.htm

57Shasta

With all said above, I will throw in my two cents. Check your power to the radio. I have seen this with certain M power supplies. Could happen on vehicle installs too. The key up and hand-shake to the control channel happens very quick. If there is a voltage drop during this time, the high speed ...

57Shasta

I don't know for sure about the CM's, but older radios (maxtrac) did not provide mic bias voltage at the 16 pin acc connector. If your set up is using an electret mic element (as it should) it will need several volts on the mic high line to operate.

On a maxtrac, a 4.7k resistor from the 9.6v ...

57Shasta

Yes don,t go cheap. Just remember, high reflective power - you got a prob. No reflective power, you don't know what you have. Cover your *sses.

57Shasta

You could hook up two spectras to one speaker, BUT you must isolate the DC voltage on the speaker lines. 100uF at 50v caps on both speaker wires before they merge into the speaker should handle it. Would I do it? NO! ?

57Shasta

I have run into this before (recently a Lucent system) the only thing I can offer is my sympathy...

57Shasta

It is the same, worry abt the receiver...

57Shasta

I won't dissagree with above posts, but here is what exists locally. There is a SAR group that is authorized to use VHF simplex only. Works ok for on scene comms for all personell. Sucks for enroute coordination. One member aquired and licensed a GMRS repeater at a high level site. Other support ...

57Shasta

No one has replied yet so I'll jump in. I did this once years ago to a T-1600 remote. Added a lamp to alert a partly deaf person of radio traffic.
Anyway, you'll need a VOX board. Ramsey electronics have a cheap kit you can put togrther in 10 or 15 mins. I have used them before and surprisingly, no ...

57Shasta

Look at the end of both a /\/\ and woody HT antenna. Both are SMA type, but one has a recessed center an the other is flush with the bottom of the threads. Don't swap 'em. Also new style woody ants fail with regularity.

57Shasta

Low split Maratracs do 29.6 no prob. Just do the shift key thing wilst programming the freqs.

57Shasta

Ca'mon. Sigtronics is the Yugo of head sets. Don't be that cheap. Firecomm and Setcom get by. (Did you know you can order a "hygiene" kit from Firecom? Comes with spare ear muffs, foam and mic baffles). DC is avionics grade and worth the money.

Last year installing several DC units in fire rigs I ...

57Shasta

Reminds me about a dozen years ago (more?) Mot parts were shipping antenna kits where the whip missed the plating dip. They all rusted bright orange in six months! Who makes these things?

57Shasta

OOPS! Was i looking at the x-ray from the wrong side? SW-1 is on the left and SW-8 is the right. Manual states SW-8 and 7 are momentary.

So solly

57Shasta

For some strange reason, I still have docs on HLN1196B. Should have tossed 'em long ago. Anyway, here's the dirt...

Switches are numbered left to right.

SW-8 com pin 9, n/c pin 10, n/o pin 8
SW-7 com pin 6, n/c pin 7, n/o pin 5
SW-6 com pin 15, n/c pin 14, n/o pin16
SW-5 com pin 3, n/c pin 4, n/o ...

57Shasta

I don't know if it is along this line, but here is an important note about maratracs and tx power.
Have you ever installed a new maratrac? It had warning tag on its green lead that stated it must be hooked up to wherever the red A+ lead went to. What was that all about? I want the radio to go off ...

57Shasta

If you are looking for someone to repair, GUYtronics will still touch 'em

57Shasta

DANGER WILL ROBINSON! Any time you see SP in a MOT model number, take heed. It has been tweaked or modified for some specific reason at the factory. You may never know what it is you are getting...

57Shasta

Not getting into the fray of proper installation practices, you are probally losing just enough voltage that causes the radio to shut down or whatever.

Now for CDM TRIVIA! I had a customer who complained that the radios did not power up when the vehicle powered up (via a charge guard) OK I said ...

57Shasta

WalMart sells two sided tape....

57Shasta

Minimum volume is for 780/880 mobiles. Sounds to me like you lost the ground to your volume pot. Check pot and connections.

57Shasta

Spiff it up with armour-all or buff it with shoe polish and the price goes up to $125

57Shasta

I have never seen a trunked Radius, con 800 only. If it is trunked, will RADMBL work? Me thinks someone is switching front panels around or peeling stickers off...

57Shasta

OK I'll jump into this although I have lost a lot of hair dealing with pager plans.

You are correct, the first two pagers will not respond to a long B becuz of the tone difference.

The only thing I can think of is add tone C to all pagers and set up M2 for A-B, long C (have you priced those tone ...

57Shasta

P.S. to last post. It is NOT a smt fuse (befuddled by age), it's a pico fuse, 3, 4, or 5 amp. look for a little green peanut about half an inch long.

57Shasta

There is a smt fuse on the command board. If it goes (usually by grounding a speaker lead) you may very well get a fail 01/90...

57Shasta

I give the nod to Will's reply. I have fixed plenty of uhf mitreks. My first thought when I see int tx power is the harmonic filter. Bang on the screw heads with a screwdriver butt while tx and watch power. Then pop the bottom and look at the coil solders to the filter assy. Any cracked? Common ...

57Shasta

I had a police dept I did work for that had a key-card system for the doors. They figured out that by holding the uhf portable close to the reader and keying, they could open the door. Saved them from digging in their pockets for a card.
I went in one day to pick up items for repair and sure enough ...

57Shasta

You should check to see if any solders are broken around the antenna mount/jack. Transmitting without a good connection to the antenna will turn the inside of the radio into a mini microwave oven!

57Shasta

One of the worst questions I get from repeater customers is "I'm right next to the other truck and can't talk to it,there must be something wrong!"
I try to explain their repeater and mt top site with all the co-located transmitters and receivers working at the same time, how there are many ...

57Shasta

The bane of Motorola RSS. Your radio is newer than the version of software you are using. No answer, but if anybody has a fix, I'd fall over. Pays to keep your software subscriptions up to date! Poor M needs the $.

57Shasta

Fail 01/90. Common problem. The manual says this is a serial comm problem with the radio. Usually power to the radio chassis is missing (the head can't talk to the radio, hence 01/90). If fuse and power cable are OK, find the little green pico fuse on the command board and check if is open. By the ...

57Shasta

The orange lead will disable the TX function only. The green lead will turn the whole radio off. Usually both are tied to the same point for power.

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re UHF Mitrek int tx power