Batboard

Tron

Have some CDM-750 mobile radios, AAM25DKC9AA1AN, 42-50 range. Is it possible to reprogram them to the 6m FM repeater band? Hate to have to scrap these units as they are in nice shape and really put out. Andy

Tron

Replaced a battery on the Min 6 HB pager. Now the pager will not charge with the battery on the pager, but the battery will charge in the pager pocket by itself. Battery will power the pager OK. Tried 3 different "new" batteries, no difference. Anyone come across this problem? Mot replacem...

Tron

I built up a pre-amp using this tube. IIRC, used their final output module from a scrapped radio. Worked great.

Tron

I've seen my share of Mocom 10's too in local bus companies. I am old!

Had a few 80-Ds ( low band ) to work on too. Customer swore they worked better than the Motracs they had.

Tron

WOW, this brings back memories. Had several Twin V UHF mobiles that used on the CB UHF freqs and had built up a base station with these too. Its amazing they worked as well as they did, all things considered. Got out ~25 miles bse/mobile with them on simplex. There was a high stability transmit TXCO...

Tron

Did you check the mic switch? These had problems at times, especially when cold.

Tron

Tron

OK, got it, thanks.

Tron

Tron

Is the MOL down as all I'm getting is a DNS failure message for the past few days or do I have issues for some reason? Tron Network Error (dns_server_failure) Your request could not be processed because an error occurred contacting the DNS server. The DNS server may be temporarily unavailable, or th...

Tron

Thanks to all. Found my CH751. BTW, there were no key markings on the handle/lock

Tron

Tron

Looking for the number of the key that is used in the Motorola upright outside weatherproof cabinets circa 1984 or anyone who has an extra one. They were kinda of a dark beige color. Vaguely, it may have had the stamping of LL 201 on it

You can PM me off list.

Tron

Tron

Thanks for your message on the narrow band only as I was getting ready to install it. Whew! We'll let well enough alone for now as these type of "improvements" I don't need.

Tron

Tron

OK, thanks.

Tron

Tron

Just received the latest update for the CM200 software. My question is, do you just load in the updated program and it over writes what is needs to, or should you uninstall the existing program and then install the updated one? There is no guidance with enclosed "instruction" sheet.

Tron

Tron

What one wouldn't give for a detailed hard copy "service" manual for this stuff these days!

Tron

Thanks. I doodled around with some of the settings and am able to get PL on Tx with flat for data.

Tron

Tron

Also, Accy package = Default

Tron

Nothing hooked to Pin 14 and it shows unassigned in the software.

Tron

Trying to get a VHF CM-200 programmed for MDT operation. Have it pretty well programmed, but have a problem, however. When keying up the radio from the accy plug, Pin 3, it will not transmit the PL tone. Front hand mic works OK. Have tried setting it from Ext mic to Data, and it makes no difference....

Tron

OK, thanks.

Tron

I see in the rear plug pinouts that Pin 11 is low level Rx audio. I need the non de-emphasized Rx audio that is not muted. Has anyone verified that this output is muted under both non or de-emphasized output? Is this output just squelched or is it PL/DPL controlled when muted?

Tron

Tron

Thanks for all the input.

Tron

Tron

COR = Carrier Operated Relay, probably the same as COS.

I think the CSQ would be the same thing or the PL/CSQ/Talkgroup detect may work too.

Thanks, that's what I needed to know.

Tron

Tron

I'm looking at the M-120 book right now. The HLN8074E logic bd shows a COR output on Pin 8 ( probably active low ). Maybe it can be programmed for something else too, but that's what it is being used for.

If any others pins can be used for said functions, I can work with that.

Tron

Thanks for the input. Have 2 more questions. These are being used with an MDC system of sorts. Can Pin 8 be programmed to the COR function and Pin 6 for Rx Audio mute? If not, are some of those other programmable pins available for these functions. Hopefully I won't have to rewire their interface ca...

Tron

Are the pin outs and functions for the 16 pin accy plug on the CM-200 the same as the M-120/GM-300?

Can you use the regular Mot RIB box that was used on the M-120, etc with a new GTF cable from the serial port of a computer?. Does the CM-200 program run under Windows?

Thanks

Tron

Tron

Just being curious, how are these units tested for FM rating?

Tron

Tron

I've seen that too, but not in this case, unfortunately.

Tron

Tron

Call Mot at 800-422-4210

You'll have to go on their web page at: https://businessonline.motorola.com and set up an account so you can send it in.

Tron

Tron

Have a couple in Min V pagers that are dead when the battery is attached ( batteries are new & charged ), but pager will power up when in the desk charger base ( with or w/o battery ).

Any thoughts on this problem?

Tron

Tron

We have cash for clunkers, cash for appliances, how about contacting your elected reps and getting a push for cash for comms? -- economic stimulius..and it wouldn't be billions either.

Tron

Tron

I haven't found any PMs from you yet.

Andy

Tron

I have several CDM-1550-LS UHF mobiles that need some reprogramming at a right price. Sending it to /\/\ is out of the question due to the $$$$.

You can contact me off list if anyone can help. Thanks

Tron

Tron

Are you still looking for these as I have the vibrator manual handy...have to dig for the T power one, but the wiring was the same for both on 12v.

PM me off list if you want.

Tron

Tron

Perhaps one of these fine gentlemen on the board here who have service shops could help you out.

Tron

Tron

Looks like the audio module is connected at unswitched A+. I've had a few over time that the audio module became leaky, and you would get crackling in the speaker as you describe. A little troubleshooting with a good scope would be in order.

Tron

Tron

Didn't know there were any switches inside of it. I'll have to open it up. Why can't /\/\ supply a schematic for it like they did in the past? I know, costs too much, etc...

Tron

Tron

Does anyone know right off hand if the above desk mic for Radius/Maxtrac, etc., has the Tx audio line switched w/the PTT switch or it is live all the time.

Tron

Tron

I got her done. Used one of those large soldering irons used for soldering copper pipes and heated with a blow torch. Took about 15 min total to carefully remove it and wick the solder.

Tron

Tron

Anyone have any tips on replacing the antenna jack on on SM-50, short of using a $$$$$$ hot air station?

Tron

Tron

OK, thanks. I'll give it a try....breaking out blow torch and soldering iron.

Tron

Tron

Does anyone have an insight on how to replace the polarity diode without a blow touch as it can't be unsoldered from the back side of the board?

Tron

Tron

This "vacuum packed" thing seems to be over the top considering there are jacks and controls and reset switch which would no way maintain a real vacuum. Some day I'll open one up and see whats really inside.

Tron

Tron

Was talking to /\/\oto service and they tell me that they don't have any parts for these units because the pager is vacuum sealed to be explosion proof. Can anyone confirm if this is the case? I've heard alot of claims over the years on different things so I'm naturally curious on this one. :-) Tron

Tron

Yup, now is the time to be getting in. They have too much gov't business to go under.

Tron

Tron

Bramco/Palstar in Piqua Ohio used to make up tone filters for Min II. Don't know if they are in business yet. Maybe they are on the web somewhere.

Tron

Tron

Has anyone done business with Economy Electronics in Lonoke, AR? They buy/sell transmitting tubes, among other things.

Tron

Tron

OK, i got the covers off. Next question, how does the front panel come off so I can take out the main circuit board? Is there some place to pry or snap as the front part looks like its in 2 parts.

Tron

Tron

I have one of these front mount units that has no RF output. The questions is, how do you get the case apart as there doesn't appear to have any screws, latches, etc?

Tron

Tron

Don't forget the rectifying vibrators on the 80Ds. In all my years, I never had a selenium stack fail. Must have been luck. Think I still have a dynamotor or 2 laying around.

Tron

Tron

IIRC, weren't the PermaKay filters supposed to be warranted for "life"?

Tron..who has replaced a few of them in his life.

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