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Search found 871 matches

by kc7gr
Mon Jan 15, 2018 8:29 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Spectra 146-174 110w capacitors
Replies: 21
Views: 2821

Re: Spectra 146-174 110w capacitors

Clean the entire board around the capacitor areas with 99% isopropanol (Isopropyl Alcohol). Dry thoroughly. Keep in mind the RF board is at least four layer, possibly six, so if capacitor goo got into the inner layers the only thing you can do for 100% reliability is replace the RF board. Just getti...
by kc7gr
Tue Feb 14, 2012 9:06 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Google wants to buy Motorola...
Replies: 3
Views: 897

Google wants to buy Motorola...

...at least, they want to buy the mobile phone ('Mobility') division. Get a load of this: http://arstechnica.com/tech-policy/news/2012/02/regulators-to-google-you-can-buy-motorola-but-we-still-dont-trust-you.ars I think I can best sum up my feelings about this with one symbol: :o Keep the peace(es).
by kc7gr
Tue Feb 07, 2012 3:02 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: What Is Your Prediction For The Post Narrow-Banding Time?
Replies: 57
Views: 7619

Re: What Is Your Prediction For The Post Narrow-Banding Time

My own prediction is very simple, and has very little to do with the FCC.

Specifically: I predict a BIG flood of surplus radio gear hitting the hamateur market! :D

Happy hunting.
by kc7gr
Fri Sep 23, 2011 9:21 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Syntor X9000 UHF HAM tuning
Replies: 1
Views: 418

Re: Syntor X9000 UHF HAM tuning

You have about a 50/50 chance of getting decent RX sense in the 440 band with the 9000's, better if it has the preamp option. In any case: Tuning the preselector properly requires a tracking generator and spectrum analyzer. You would need to feed it a sweep of 425 to 500MHz and, using the preselecto...
by kc7gr
Fri Jul 01, 2011 11:20 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Battery Optimizing System manual
Replies: 3
Views: 1230

Re: Battery Optimizing System manual

The Moto BOS is the same as the Cadex C7000.

The BOS-II is the C7400.

Manuals and other goodies can be found here.

http://cadex.com/support/analyzers.asp

Happy conditioning.
by kc7gr
Sat Dec 04, 2010 9:28 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: MaxTrac No audio
Replies: 10
Views: 955

Re: MaxTrac No audio

One thing Maxtracs were notorious for, with this symptom, is: If they've ever been dropped, or sustained even a mild impact to the front panel, the volume pot's resistive element would fracture.

I would pay particular attention to said pot.

Happy tweaking.
by kc7gr
Sat Sep 25, 2010 8:23 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Dead Spectra head
Replies: 10
Views: 915

Re: Dead Spectra head

Don't trust at-a-glance visual inspection for the two 10uF caps. I've seen several heads and radios where, to the unaided eye, the caps look perfectly all right -- until you detach them from the board, and find ugly corrosion underneath! I almost lost my own UHF radio to that issue before I found ou...
by kc7gr
Sat Aug 07, 2010 5:19 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: RLN4460 Schematic now available
Replies: 2
Views: 1883

Re: RLN4460 Schematic now available

Any one of several different packages, depending on the purpose of the schematic itself. In this particular case, I drew it with Protel 99, many moons ago, and then converted it to PDF with some PDF-to-graphic file tools. These days, I use Altium Designer or CircuitMaker if I'm serious about turning...
by kc7gr
Sat Aug 07, 2010 7:49 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: RLN4460 Schematic now available
Replies: 2
Views: 1883

RLN4460 Schematic now available

I've had many requests for the schematic I generated of the RLN4460B/C test set. Enough, in fact, that I've moved the file to the 'public' section of my FTP site. ftp.bluefeathertech.com Anonymous logins are fine. The file path is: electronics/testgear/Motorola/rln4460b-c Please note: The path is ca...
by kc7gr
Sun May 16, 2010 7:04 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Spectra Gurus Advice?
Replies: 5
Views: 544

Re: Spectra Gurus Advice?

Thank you. Admittedly, some of the photos and data are out of date. For example, the IC706 was removed over a year ago, to be replaced by a low-band GE Orion. As far as the D-sub box is concerned: Just about any type of D-sub parallel arrangement will work. Motorola made a great design decision in t...
by kc7gr
Sun Mar 28, 2010 6:50 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Maxtrac trunking control board HLN9313 for conv ?
Replies: 6
Views: 569

Re: Maxtrac trunking control board HLN9313 for conv ?

To do a true conventional conversion requires both changing the firmware EPROM, and using special RSS to blank the board and reinitialize it as the model and bandsplit you want. Once this is done, the radio must be put through a full alignment (yes, this requires a service monitor or equivalent disc...
by kc7gr
Sun Feb 21, 2010 10:20 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Spectra Help
Replies: 5
Views: 509

Re: Spectra Help

The issue you're running into is a firmware version difference between memory modules. Zone operation is not supported in firmware versions below 6.x. Is it possible to upgrade the memory module? Yes, but you'd need a full-blown surface-mount IC rework station, a device programmer, the appropriate b...
by kc7gr
Mon Feb 08, 2010 10:10 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Motorola Maxtrac Question
Replies: 3
Views: 772

Re: Motorola Maxtrac Question

I've done several of the low-band Maxtrac conversions. Yes, it's possible, but doing it right will require a service monitor. This is mainly because you need to do some tweaks to the receiver's front end, in the form of putting stainless-steel or brass set-screws into some of the coil forms. The fac...
by kc7gr
Tue Oct 20, 2009 9:01 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: OK to bring two ways in your carry-on luggage at the airport
Replies: 21
Views: 3668

Re: OK to bring two ways in your carry-on luggage at the airport

I concur with the group so far. Nothing really to worry about. I've gone through security at SEA (SeaTac) several times with an MTS2000 which, except for the antenna, looks identical to those used by the local TSA and airport staff. The only question I ever got out of them was "Can it pick up o...
by kc7gr
Mon Oct 05, 2009 9:35 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Motorola Battery Maintenance System
Replies: 2
Views: 1847

Re: Motorola Battery Maintenance System

Those systems, if I recall correctly, are simply a rebadged Cadex C7000.

If that's the case, the user's manual should be available here.

http://www.cadex.com/support/older.asp

Happy tweaking.
by kc7gr
Sun Aug 30, 2009 11:56 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Spectra Info
Replies: 8
Views: 1186

Re: Spectra Info

Gaah! Sorry, you're right, I missed that. There are only three ways I know of to get rid of that error. (1) Go in and 'bit-bang' the radio memory to a 'neutral' or 'factory-fresh' state, using the Software Which Shall Not Be Named, then reprogram with the codeplug build of your choice. May take a wh...
by kc7gr
Sun Aug 30, 2009 8:09 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Spectra Info
Replies: 8
Views: 1186

Re: Spectra Info

Not with a Range 3 PA deck in it. Sounds like it would be perfectly usable on 440 amateur. However, there are some caveats. (1) The 'time-bomb' electrolytic caps. If they haven't been replaced as yet, do so. Even if they look OK, replace them (or send the radio to myself or Will for re-capping if yo...
by kc7gr
Tue Aug 18, 2009 7:25 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Analog Spectra Channel Limit - Update
Replies: 32
Views: 4921

Re: Analog Spectra Channel Limit - Update

I would be happy to -- If I could FIND an E-series SmartZone Spectra! Where the heck are they? You'd think they'd be turning up on That Auction Place by now. And to answer an earlier question: No, I didn't actually try programming a radio with the mod to 134 modes. Based on other's experiments, I'm ...
by kc7gr
Wed Aug 12, 2009 11:53 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Analog Spectra Channel Limit - Update
Replies: 32
Views: 4921

Re: Analog Spectra Channel Limit - Update

Bump, due to update. Read the top post. Sorry, gang... I tried!
by kc7gr
Tue Aug 11, 2009 1:10 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Analog Spectra Channel Limit - Update
Replies: 32
Views: 4921

Re: Analog Spectra Channel Limit Cracked!

If only this could work on the Astro Spectra! Heh? The Astro's already got 250 modes or so. In fact, that's what inspired me to start digging in the analog radio. Is there some other feature I'm missing to put that in context? I should have been more specific, the W4 model Astro Spectra (what I hav...
by kc7gr
Tue Aug 11, 2009 1:08 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Analog Spectra Channel Limit - Update
Replies: 32
Views: 4921

Re: Analog Spectra Channel Limit Cracked!

@Zack: Sorry, I mis-typed. I meant dumping all 65,536 bytes could be quite a chore. @Batwings21: I think you may be right, but I'm still curious to see where, exactly, the limit is. What I may need to do is desolder the EEPROM, once I've got everything programmed, and read it to see how much free sp...
by kc7gr
Tue Aug 11, 2009 10:14 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Analog Spectra Channel Limit - Update
Replies: 32
Views: 4921

Re: Analog Spectra Channel Limit Cracked!

See top message. Topic updated. Results not good.
by kc7gr
Tue Aug 11, 2009 10:00 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Analog Spectra Channel Limit - Update
Replies: 32
Views: 4921

Re: Analog Spectra Channel Limit Cracked!

Ranger522 wrote:If only this could work on the Astro Spectra!


Heh? The Astro's already got 250 modes or so. In fact, that's what inspired me to start digging in the analog radio. Is there some other feature I'm missing to put that in context?
by kc7gr
Mon Aug 10, 2009 9:19 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Analog Spectra Channel Limit - Update
Replies: 32
Views: 4921

Re: Analog Spectra Channel Limit Cracked!

See top message. Topic updated. Results not very good.
by kc7gr
Mon Aug 10, 2009 1:33 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Analog Spectra Channel Limit - Update
Replies: 32
Views: 4921

Analog Spectra Channel Limit - Update

OK, gang... I updated the topic from the top so as not to create false hope. I've got good news and bad news. GOOD: The channel limit byte, at MLM location 6128, can indeed be tweaked to increase the number of modes you can put into a conventional Spectra. BAD: Batwings21 was right. Trunking data is...
by kc7gr
Thu Jul 23, 2009 6:24 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: VHF X9000 down to Ham Frequencies
Replies: 10
Views: 617

Re: VHF X9000 down to Ham Frequencies

The tuning 'procedure,' such as it is, for getting the preselector down into 2 meters is pretty much: --Hook your spectrum analyzer and compatible tracking generator together. --Hook the output of your tracking generator to the radio's antenna input (you may have to temporarily bypass the preamp, if...
by kc7gr
Mon Jul 13, 2009 9:07 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: another spectra problem
Replies: 4
Views: 478

Re: another spectra problem

I fully agree. If the caps are not positively known to have been changed out, do so! You lose nothing other than a bit of time and effort (and a few dollars for the caps), and you could end up saving your radio from a horrid fate. Now, with that said... I've found, in times past, that loss of receiv...
by kc7gr
Wed Jul 08, 2009 7:44 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Maxtrac 100 Data Radio
Replies: 3
Views: 388

Re: Maxtrac 100 Data Radio

Should be easy enough. Just open the radio up and see if there's a jumper across the power switch portion of the volume control. If so, remove it.
by kc7gr
Wed Jul 08, 2009 7:41 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: low band maratrac to 6 meter ham
Replies: 14
Views: 2840

Re: low band maratrac to 6 meter ham

You don't have to use brass, Will. I've found that stainless steel hex-socket set-screws work very well indeed, and they're readily available at larger hardware stores. 6-32 should be the correct diameter. The trick is not so much the screw as making sure the material is non-ferrous (or, to put it m...
by kc7gr
Mon Jul 06, 2009 7:44 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: spectra control heads
Replies: 6
Views: 523

Re: spectra control heads

HLN1185B and later (I believe the last revision was HLN1185D) will work with either analog or Astro Spectras. HLN1185A will work only with analog radios. Keep in mind Astro Spectras have the same time-bomb capacitor problem the analog radios did. If the caps have not been replaced in yours, they sho...
by kc7gr
Sun Jun 21, 2009 8:58 pm
Forum: Computer/Technical Assistance
Topic: ISA Adapter question
Replies: 4
Views: 1558

Re: ISA Adapter question

Just for reference -- WaveLAN was a manufacturer of network cards. Without seeing the connectors that were on the cards you have, I can only speculate as to what they were. I can tell you that both early Ethernet and Novell used coaxial cable with BNC's.

Keep the peace(es).
by kc7gr
Sun Jun 21, 2009 8:09 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: Need info IFR 1600
Replies: 4
Views: 648

Re: Need info IFR 1600

Speaking as an owner/user of the 1600, I really like it. My only real concern was the long-term life of the CRT, and what to change out to once it went. This concern was especially strong because of the video display format used (EGA). Fortunately, I discovered a company that makes an EGA-to-VGA con...
by kc7gr
Sun Jun 21, 2009 7:17 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: need help on part number of Motorola item
Replies: 3
Views: 543

Re: need help on part number of Motorola item

These are either carbon element or amplified dynamic (more likely the latter), which means the mic side will need a DC bias voltage to operate. The plug is called a 310 type, and is very common in telephone work (it has been around since the 1940's at least). It was co-opted for radio communications...
by kc7gr
Sun Jun 21, 2009 7:10 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Maratrac no audio
Replies: 6
Views: 691

Re: Maratrac no audio

The Maratrac is basically a Maxtrac with a big power amp attached. This means it has (ultimately) the same guts in the receive audio section as the Maxtrac. This means it is a 'balanced' output circuit. Shorting either speaker lead to ground will cause the output chip to blow itself up. This may ver...
by kc7gr
Sun Jun 21, 2009 7:07 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Spectra MLM Compatability
Replies: 6
Views: 623

Re: Spectra MLM Compatability

This is true, and it can work. What I was referring to was physically removing the EEPROM from the MLM, sticking it in a separate programmer, loading it with a "blank" codeplug image that has been bit-banged for the specific radio in question (as in MOFLAGS, serial number, etc.), and then ...
by kc7gr
Sun Jun 21, 2009 6:59 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: PC-based DPL decoder software??
Replies: 2
Views: 753

Re: PC-based DPL decoder software??

I would be a bit surprised if you do find something. Recovering the DPL signal, and getting it clean enough for decoding, would be quite a challenge for many sound cards. Doing so would require excellent low-frequency response and equally good S/N ratio. The closest thing I've heard of is WinCTCSS, ...
by kc7gr
Sun Jun 21, 2009 6:47 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Programming a MCX100
Replies: 4
Views: 452

Re: Programming a MCX100

I can program those as well (and there are ways to do so without the suitcase programmer - third-party software, specifically, along with a separate device programmer), but you should be aware that the 82S129 is a one-time programmable device. They cannot be erased and reprogrammed. Also, with most ...
by kc7gr
Tue Jun 16, 2009 8:52 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Spectra MLM Compatability
Replies: 6
Views: 623

Re: Spectra MLM Compatability

The Spectra MLM's can be reworked to be compatible with whatever radio you want to put them in, but doing so requires surface-mount rework equipment, a device (EPROM) programmer, and lots of patience with a hex editor. I have been successful in re-adapting a couple of MLMs to date. If you cannot fin...
by kc7gr
Wed May 20, 2009 3:14 pm
Forum: Radio Programming
Topic: Spectra programming
Replies: 6
Views: 999

Re: Spectra programming

The short answer is that you need to have the external security module plugged in, at least long enough to read the codeplug. Once you've read it, you can go in and disable the encryption option and reprogram. You will then have no more errors about the external housing. Let me add that the chances ...
by kc7gr
Wed May 06, 2009 7:41 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Motorola MaxTrac VHF RX problem - Please Help!
Replies: 2
Views: 490

Re: Motorola MaxTrac VHF RX problem - Please Help!

Could be any number of factors. Some of the more common problems include severe reduction in receiver sensitivity due to blown PIN diodes in the antenna switch section; failure of the first local oscillator crystal; and failure of the audio stage due to one or the other speaker lead getting shorted ...
by kc7gr
Thu Feb 12, 2009 9:24 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Logging software
Replies: 3
Views: 508

Re: Logging software

Try this link: http://www.multichannelrecorder.com/ Quick summary: Record up to 16 channels, VOX or manual control. Works with a variety of sound cards, including specialized multichannel telephony cards such as Dialogic (if you install the Dialogic .WAV driver). Personally, I'm using it with a Dial...
by kc7gr
Thu Jan 15, 2009 9:46 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Spectra Leaky Cap & Tuneup
Replies: 7
Views: 591

Re: Spectra Leaky Cap & Tuneup

Batman & Sourapple613 -- Check your PM's. The choice between myself and Will usually comes down to geography or who's backlogged at the time.

Happy communicating.
by kc7gr
Sun Dec 28, 2008 8:39 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: More Spectra tweaking
Replies: 0
Views: 341

More Spectra tweaking

In case Spectra owners were unaware, XMO did some amazing work dealing with the problem of programming out-of-band frequencies into Spectras, as detailed here. http://www.batlabs.com/specband.html With that in mind, another thought occurred to me (and perhaps XMO would like to take on another challe...
by kc7gr
Wed Dec 24, 2008 10:35 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Talk on radio via internet
Replies: 3
Views: 462

Re: Talk on radio via internet

You should probably visit...

http://www.irlp.net/

Don't forget about FCC regs regarding control stations, remote control of transmitters, etc.

Happy tweaking.
by kc7gr
Fri Dec 19, 2008 7:20 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Spectra Caps
Replies: 7
Views: 764

Re: Spectra Caps

There is a bit of an art to it, admittedly. Took me a couple of tries to get it right, and no two people will favor the exact same method. What I do, after cleaning the board of the old caps and electrolyte residue, is put the new cap into place with a fine-point probe, then hold it down with a midd...
by kc7gr
Tue Dec 16, 2008 9:22 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Spectra Caps
Replies: 7
Views: 764

Re: Spectra Caps

Would those be the mil-spec tantalums, Will? In any case... I have found that high-quality electrolytics (the Panasonic HD series) hold up very well indeed. They're rated for 5,000 hour life at 105 degrees C, and they are almost the exact same form factor as the original parts. I will add that If yo...
by kc7gr
Tue Dec 16, 2008 9:59 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Firmware
Replies: 7
Views: 821

Re: Firmware

Hello All! I would like for someone to explain what firmware is and how to get it. (snippage) Firmware usually refers to the operating code for a microcontroller or microprocessor. It is usually programmed into a non-volatile memory chip, such as an EPROM, EEPROM or FLASH device. Whoever manufactur...
by kc7gr
Sun Dec 14, 2008 9:32 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: spectra volume set
Replies: 2
Views: 318

Re: spectra volume set

The MIN VOLUME setting in the RSS is typically used only with control heads having a rocker type volume control (A5, A7, A9). I've never tried tweaking it on an A4, so your experiment leaves me a bit puzzled. Question: Have the 'time-bomb' electrolytic caps been replaced in this radio? If not, it is...
by kc7gr
Sun Dec 14, 2008 9:26 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: RR Spectra Receive Problem
Replies: 3
Views: 299

Re: RR Spectra Receive Problem

One of two possibilities occurs to me. First: The radio had receive problems (likely an issue with the front end module) before you started working on it. You may want to try a different front end from a donor radio of the same bandsplit. Second: You created a short or open along the receive side in...
by kc7gr
Thu Dec 04, 2008 3:13 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Securenet on Amateur radio - IT IS LEGAL!! If....
Replies: 83
Views: 7569

Re: Securenet on Amateur radio - IT IS LEGAL!! If....

(baffled look)

If you want to talk short-range encrypted, VHF MURS channels should do just fine. No need to even get near hamateur freqs.

Am I making myself a target by trying to speak common sense? :lol:

Happy communicating.

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