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Search found 486 matches

by k2hz
Thu Feb 08, 2018 11:43 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Hamtronics Inc is OOS
Replies: 4
Views: 873

Re: Hamtronics Inc is OOS

Jerry and his wife Joan ran the business out of their house so it was strictly mail order even for locals. The last time I had any contact with Jerry was several years ago when they advertised a sale of boxes of assorted excess parts inventory at very low prices. I suspected at the time they were ph...
by k2hz
Thu Feb 08, 2018 6:31 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Hamtronics Inc is OOS
Replies: 4
Views: 873

Re: Hamtronics Inc is OOS

This is old news. Owner Jerry Vogt was incapacitated in an accident in 2016 and died in November 2017. The website has not been updated since the accident.

http://www.legacy.com/obituaries/democr ... =187343356
by k2hz
Mon May 29, 2017 11:54 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Nation wide license?
Replies: 18
Views: 2195

Re: Nation wide license?

arlojanis wrote:Another strike against MURS is he wants Motorola radios and they are probably type accepted for MURS.


Take a look at the Motorola RMM2050 MURS radio. It should be perfect for this application.
by k2hz
Tue May 23, 2017 11:46 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Nation wide license?
Replies: 18
Views: 2195

Re: Nation wide license?

If the system is just portables for in-store use MURS could be a good solution. VHF 2 Watt portables should provide adequate coverage and you will have 5 channels to choose from to avoid local interference. No license or coordination fees. You are not going to get a clear licensed channel nationwide...
by k2hz
Sat Mar 04, 2017 11:20 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: 146.52 channel elements
Replies: 7
Views: 1201

Re: 146.52 channel elements

I have purchased crystals from ICM to recrystal Micor elements and I found the compensation to be good with the existing element components. Certainly good enough for ham use. I have several in service in VHF voting receivers in a cabinet at an unheated site that have been in service for several yea...
by k2hz
Wed Nov 16, 2016 10:24 am
Forum: Radio Programming
Topic: CP200 Programming
Replies: 6
Views: 1010

Re: CP200 Programming

I am not familiar with details of the CP200 channel selector circuit but most radios use a 4 bit binary code from the channel selector switch to the CPU. It is likely that the switch or the connection to the CPU is not providing the binary "1" bit but the binary "2" bit is workin...
by k2hz
Wed Sep 14, 2016 5:30 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: HP 8935 Service Monitor / TDMA Test Set - OK For Analog FM?
Replies: 7
Views: 1384

Re: HP 8935 Service Monitor Usage

When I bought this monitor I was easily able to find and use the monitor for sweeping/tracking duplexers and after not using it for six months, I can't find the sweep/track function. Anyone out there able to point me to the correct menu selection would be doing me a huge favor. Dave-k7gdm Go to the...
by k2hz
Fri Apr 15, 2016 9:18 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Motorola Oddballs through the years
Replies: 307
Views: 88493

Re: Motorola Oddballs through the years

That is a Motorola "Handie Micro Talkie". It is a transmitter only and was generally used for one way communications. I have not seen that model with the pull out antenna before. A model with fixed loop antenna that was also a handle was comon for use in railroad yards. It is similar to th...
by k2hz
Sun Jan 31, 2016 5:39 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Motorola Pageboy Charger NLN6432B
Replies: 8
Views: 1150

Re: Motorola Pageboy Charger NLN6432B

I believe the lamp is in series with the battery to act as a simple current regulator. If so, voltage of the lamp plus the voltage of the battery should be slightly greater than the open circuit output voltage of the charger and the current rating of the lamp should be slightly greater than the maxi...
by k2hz
Fri Jan 29, 2016 7:41 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Motorola Pageboy Charger NLN6432B
Replies: 8
Views: 1150

Re: Motorola Pageboy Charger NLN6432B

I can't find the lamp info for that specific charger but similar chargers of that era for portables like the HT200 used an incandescent lamp as the current limiting device. Some lamp types used were 756, 1819 & 1829 with the desired charge rate apparently determining the lamp type used.
by k2hz
Tue Sep 22, 2015 2:10 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: MDC1200
Replies: 4
Views: 905

Re: MDC1200

Most Motorola radios have the "DOS" feature that mutes the MDC1200 audio other than an initial brief chirp. This is a feature that has to be enabled in the radio programming or your hear the full "squawk". I an not aware of this feature being available on scanners.
by k2hz
Thu May 22, 2014 10:03 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Transistorized "Dispatcher" Radiophone
Replies: 14
Views: 2733

Re: Transistorized "Dispatcher" Radiophone

By "transistorized" do you mean to include the series that used a tube PA? AFAIK, the "DEN" units I mentioned above were the first that were all solid state. There was an earlier Dispatcher version, the "BMT" series based on the packsets that my info shows only were ava...
by k2hz
Thu May 22, 2014 7:43 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Transistorized "Dispatcher" Radiophone
Replies: 14
Views: 2733

Re: Transistorized "Dispatcher" Radiophone

I am looking at a 1967 Motorla catalog that has the D41/D23/D43DEN series "Dispatchers" that were based on the HT/PT200 portables. There are no UHF "D*4" models listed, only the Low and VHF versions. This catalog also lists only Low and VHF versions of the PT200/300. The HT200 an...
by k2hz
Wed May 07, 2014 10:15 am
Forum: Motorola Digital and Voice Paging
Topic: Difference between "Pageboy II" and "Metro Pageboy II"
Replies: 3
Views: 1099

Re: Difference between "Pageboy II" and "Metro Pageboy II"

The Metro was what Motorola called "Decimal Digital" which was actually a 5/6 tone format.
by k2hz
Tue Apr 15, 2014 6:28 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Transcrypt wire in board connections
Replies: 2
Views: 424

Re: Transcrypt wire in board connections

Since you have not received any specific responses, here is some general info that may help. I don't have any specific info for your radio but I have successfully removed add-on excryption boards from several other types of radios. Like you, I was unable to get any schematic of the add-ons. My techn...
by k2hz
Sat Mar 29, 2014 5:49 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Quantar Ham Repeater & Cold Temps.
Replies: 6
Views: 727

Re: Quantar Ham Repeater & Cold Temps.

Here is a remote possibility but I have seen it happen a few times - The cold causes the center conductor of the coax to contract enough to pull the center pin of a type N connector back to the point that the connection is intermittent. Once things warm up - trouble goes away. In the cases involving...
by k2hz
Mon Feb 10, 2014 7:10 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Narrowband - why does Motorola specs imply deafer radio?
Replies: 14
Views: 3834

Re: Narrowband - why does Motorola specs imply deafer radio?

As you decrease your modulation index much below 1, you begin to lose a great degree of the noise immunity that is a benefit of FM. So, if my old brain remembers correctly, the FM modulation index is deviation divided by the max information frequency? If we keep our max audio frequency at 3 kHz on ...
by k2hz
Wed Jan 29, 2014 6:49 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: New Low Band Radios
Replies: 8
Views: 1955

Re: New Low Band Radios

IMHO you can't beat the Kenwood TK-6110 for a solid performing, 70W, Low Band radio. The 35-50 split is a plus compared to 36-42 or 42-50 for most other Low Band units.
by k2hz
Sat Nov 30, 2013 3:11 pm
Forum: Radio Programming
Topic: Need info on M1225 RSS Versions.....probs with tx/rx
Replies: 5
Views: 1306

Re: Need info on M1225 RSS Versions.....probs with tx/rx

Hi I have a Motorola M1225 which I listed for sale and before I send it off I would like to verify the radio can be read and written to. I have the following version: Motorola Radius 1225 Version 3.1 Release Build 2 DESCRIPTION: This software is Version 3.0 of the 1225 Series RSS. It supports the R...
by k2hz
Thu Aug 29, 2013 8:14 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Crystals for older radios?
Replies: 3
Views: 660

Re: Crystals for older radios?

One additional complication with the MT500 is that it uses channel elements so you would need to rebuild the channel elements with new crystals. When you say the ham crystals are easily obtainable do you mean for normal ham units and not the HT220? Motorola commerical radios use different multiplica...
by k2hz
Sun Aug 18, 2013 5:33 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: What was your first /\/\otorola radio?
Replies: 124
Views: 20986

Re: What was your first /\/\otorola radio?

FMTR-140D Low Band and FMTRU-80D High Band (1962)

I also had a FMAR-13V reciever part of the original two piece mobile FMT/FMR series.
by k2hz
Wed May 15, 2013 1:34 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Identifying a Radio
Replies: 12
Views: 2685

Re: Identifying a Radio

I believe the MCR-100 uses channel elements and is not programable.

You can get the existing channel elements recrystalled but it is expensive. ICM is the best source I am aware of.
by k2hz
Fri Mar 29, 2013 2:31 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Motorola T1611A
Replies: 9
Views: 1022

Re: Motorola T1611A

southerngent wrote:Would be interesting to find some kind of manual or paperwork on this unit to see what it was intended to be used for...oh well

This link fully describes the system. The dial is for the "IPS Code".

http://www.info4u.us/HEAR_Program.pdf
by k2hz
Fri Mar 29, 2013 11:52 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Motorola T1611A
Replies: 9
Views: 1022

Re: Motorola T1611A

,just asking myself why someone would go to the trouble of installing a rotary phone dial on a unit that would not accept it.....strange!...would have made a great conversation piece. The T-1611 was used for the HEAR -Hospital Emergency Administration Radio - system that was an emergency radio link...
by k2hz
Wed Mar 06, 2013 7:44 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Single tone Burst question
Replies: 12
Views: 1434

Re: Single tone Burst question

Brings back memories of MTS and IMTS... I used to make a box called ChannelGrabber for IMTS users. I worked for an IMTS carrier and we upgraded to a Glenayre terminal with anti-ChannelGraber firmware much to the consternation of a vendor whos users phones now had great difficulty connecting. The Ch...
by k2hz
Mon Mar 04, 2013 7:29 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Single tone Burst question
Replies: 12
Views: 1434

Re: Single tone Burst question

As I mentioned in my reply to your post about the console, I have never seen single tone used and I have been involved with 2-way since 1962. The odd thing about your console is that is specifically for control of a PL base with the optional current generator to provide the reverse current monitor f...
by k2hz
Sat Mar 02, 2013 4:00 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Vintage equipment ID help
Replies: 18
Views: 2480

Re: Vintage equipment ID help

That IS a T13xx series DC Remote Control Console. It also has a line operated TX indicator, probably used on the same line as another remote. From the circuit boards shown it is probably a T1398AM 2 frequency DC remote for a PL base station. The Line Current board supports reverse line current for ...
by k2hz
Wed Feb 27, 2013 11:08 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Vintage equipment ID help
Replies: 18
Views: 2480

Re: Vintage equipment ID help

The console version of the 1300 series remotes includes the T1336,1367 and T-1390 series. All match the physical description of what you have. The general 1300 series also included the telephone type units. The consoles have a speaker with power and volume knobs beneath it on the right. There is a g...
by k2hz
Thu Feb 21, 2013 11:43 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Motorola Motrac and Desktop Remote.
Replies: 2
Views: 588

Re: Motorola Motrac and Desktop Remote.

You would need a DC Remote Adapter such as a CPI Communications DTP Series added to the mobile.
by k2hz
Mon Dec 17, 2012 5:43 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Users Going To Narrower Bandwidth Equipment
Replies: 15
Views: 1643

Re: Users Going To Narrower Bandwidth Equipment

I think there is a perception that DPL has some advantages over PL such as more available codes and possibly better performance at the lower deviation levels. Switching from PL to DPL in the past was not always an easy option since some older radios could not do DPL. With the change to all NB compli...
by k2hz
Fri Oct 26, 2012 6:05 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Pending Narrowband License
Replies: 38
Views: 5546

Re: Pending Narrowband License

Doesn't make a lot of sense that business and IG's would take that long unless they really have a back log of processing the fee exemption requests. I think the fee exemption is the issue. I submitted an application on 4/16 with a Fee Exemption attachment. it was "Offlined for Attachment Revie...
by k2hz
Fri Aug 31, 2012 7:11 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Saber Batteries
Replies: 7
Views: 1071

Re: Saber Batteries

I had been buying ProStar NIMH batteries for Genesis series radio for many years and they were great up until about 2010. Since then they have consistently failed suddenly after 13-15 months of use. I have some ProStar batteries from 2007-2010 still in service that are fine but every one purchased s...
by k2hz
Wed Jul 04, 2012 10:37 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Micom AME mode
Replies: 2
Views: 808

Re: Micom AME mode

The receiver is SSB only. The "AME" mode is H3E that is SSB with reinserted carrier that was used mainly during the transition from AM to SSB in the maritime services years ago so that the SSB signals could be received on an AM receiver. It was used for distress situations on 2182kHz to in...
by k2hz
Mon Jun 25, 2012 5:37 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: NTN4668A ht600 bank charger
Replies: 3
Views: 764

Re: NTN4668A ht600 bank charger

I just got this charger from a local shop on a trade. All LEDS flash in sequence upon power up- I'm pretty certain that's normal. But when a battery is inserted, it just flashes red like it's a bad battery. Every charger slot does it. My batteries are good enough that they'll charge in other charge...
by k2hz
Sun Jun 10, 2012 5:06 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Dont wait too long on fcc license modification to narrow ban
Replies: 27
Views: 2497

Re: Dont wait too long on fcc license modification to narrow

Hello : Just an update on the fcc saying 90 days back log on the modifications on wide band to narrow band. Some said they got theirs granted fairly quick but my license with fee exemption attachment - still after 2 1/2 days says pending. Ill keep an eye on it and post back when it gets looked at a...
by k2hz
Thu May 03, 2012 8:53 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Railroad Spectra
Replies: 4
Views: 621

Re: Railroad Spectra

I have not asked about input voltage yet. My bench supply only goes up to 40 volts. Do you think 40 volts will start the 72 volt supply? I just tried a RR Spectra on my bench and it will start as low as about 36 V. Below that it tries to start but acts flaky. I assume if I tried to TX it would need...
by k2hz
Fri Apr 27, 2012 5:04 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Dont wait too long on fcc license modification to narrow ban
Replies: 27
Views: 2497

Re: Dont wait too long on fcc license modification to narrow

Hello : Just an update on the fcc saying 90 days back log on the modifications on wide band to narrow band. Some said they got theirs granted fairly quick but my license with fee exemption attachment - still after 2 1/2 days says pending. Ill keep an eye on it and post back when it gets looked at a...
by k2hz
Mon Dec 19, 2011 7:16 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Repairing the Maxar 80, need some help
Replies: 23
Views: 2548

Re: Repairing the Maxar 80, need some help

Circlebat..sorry about the delay...busy with other work. I am not sure exactly, but they talk to the Maxars and I think they are 151Mhz... The model number code says the "middle" frequencies, which are apparently 136- to 174 Mhz That helps any? Jim The manual for the D33TSA3300 is 68P8103...
by k2hz
Sun Dec 11, 2011 3:25 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Repairing the Maxar 80, need some help
Replies: 23
Views: 2548

Re: Repairing the Maxar 80, need some help

I have the manual in front of me and I think I found the part in question: c168 23-84538G06 47uF +/- 20% 20V It is on the line from the collector of Power Control Driver Q 802 to the output of the Exciter Power Amp through L124. The collector of the Amp Q122 goes through L123 to the junction of L123...
by k2hz
Sun Nov 13, 2011 5:38 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Narrow Band versus Wide Band Tx range diferences ????
Replies: 15
Views: 3600

Re: Narrow Band versus Wide Band Tx range diferences ????

. It doesn't have to be that way, if you believe Shannon and Nyquist and information theory That is true in terms of the capability of the system to transmit information but there are other factors in the quality of the received signal. A significant advantage of FM over AM is the quieting and capt...
by k2hz
Thu Nov 10, 2011 7:46 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Narrow Band versus Wide Band Tx range diferences ????
Replies: 15
Views: 3600

Re: Narrow Band versus Wide Band Tx range diferences ????

I don't beleive the FCC has changed any technical standards on ERP for narrow band. It would take at least 3db increase in power to make any perceptible change in the received signal quality. More would be needed to make a significant improvement. TX power increase is not usually a practical solutio...
by k2hz
Wed Nov 02, 2011 1:00 pm
Forum: Radio Programming
Topic: MT1000 152-174 Split
Replies: 9
Views: 1078

Re: MT1000 152-174 Split

I suspect they might be an early model before Motorola came out with the full 146-174 bandsplit version. It sounds like they may have attempted to stretch the spread of the early 157-174 split for users that needed both Federal Govt and civilian Public Safety in one radio. I can't find a manual that...
by k2hz
Mon Oct 31, 2011 12:35 pm
Forum: Radio Programming
Topic: MT1000 152-174 Split
Replies: 9
Views: 1078

Re: MT1000 152-174 Split

I see that the RSS does list that bandsplit but I have never seen one and the MT1000 series service manual only lists 136-151, 146-162, 157-174 and 146-174 as valid bandsplits. (see 68P81067C40-B Page 11 for the tables of VCO voltages vs frequency for the various bandsplits) I believe the 157-174 ca...
by k2hz
Fri Oct 28, 2011 12:20 pm
Forum: Radio Programming
Topic: MT1000 152-174 Split
Replies: 9
Views: 1078

Re: MT1000 152-174 Split

There is no "152-174" split for the MT1000. Later models were 146-174 and earlier versions were 146-162 or 157-174. The 146-174 or 146-162 versions work fine on 2M above 146 but will not go below 146. The 157-174 version will not work on 2m. If it is a Red Cross and not a former Federal Go...
by k2hz
Mon Oct 24, 2011 4:50 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Base Antenna advice??
Replies: 15
Views: 726

Re: Base Antenna advice??

radius2479 wrote:is it possible to get a license for the GM300's?? And how would one obtain it ...?

If the GM300s are 406-430 they can only be used in the US by a Federal Government agency. They can not be licensed for civilian use.
by k2hz
Sun Oct 23, 2011 9:08 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: MSF 5000
Replies: 9
Views: 636

Re: MSF 5000

Any of the Com-Spec kits I am aware of are strictly for receivers and do not claim to make a transmitter compliant. The FCC has made it very clear that conversion kits for transmitters are not acceptable like they did allow years ago for 15 to 5kHz deviation "narrow banding". I have used t...
by k2hz
Wed Oct 12, 2011 6:04 am
Forum: Vehicle Radio Installs
Topic: Just when I thought I had seen everything
Replies: 23
Views: 7141

Re: Just when I thought I had seen everything

No. Please, tell me this was just a bad pun. I've seen stupid people, I've seen my share of shysters, and stupid shysters, but 'gain' coax?? Nawww... I recall back around 1970 there really was some outfit that was nationally marketing "gain coax". The target market was primarily CB but I ...
by k2hz
Tue Oct 11, 2011 5:26 am
Forum: Radio Programming
Topic: Serial error #006 (LB MT-1000)
Replies: 11
Views: 942

Re: Serial error #006 (LB MT-1000)

The service manual for the full MT1000 line is 68P81067C40. I think it is still available from Motorola for less than $20. The manual covers Low/High/UHF and all the front covers and accesories like mics and the vehicle charger. Glad to hear you got it working. I find it is risky to program these ol...
by k2hz
Mon Oct 10, 2011 3:33 pm
Forum: Radio Programming
Topic: Serial error #006 (LB MT-1000)
Replies: 11
Views: 942

Re: Serial error #006 (LB MT-1000)

The long beep is the normal power up from the radio and the "dit dit" is from the front cover. If there is no MDC front or the MDC front is not working there is no "dit dit". After it programs the main unit does it show the 0-100% progress bar for programming front cover? Does th...

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