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Search found 25 matches

by mruwave
Thu Feb 28, 2013 9:17 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Vintage equipment ID help
Replies: 18
Views: 2496

Re: Vintage equipment ID help

Thats a roll of aluminum foil, with a beige thingy on top of it! No, really it is, indeed, one of the old Motorola 'consolette' control systems. I worked on a lot of these in the 70's. They typically are either DC Line outputs or multiconductor outputs that connect them to the base radio. Look for a...
by mruwave
Fri Jul 20, 2012 8:41 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: microwave at a radar site
Replies: 5
Views: 399

Re: microwave at a radar site

I have a 1 Megawatt ERP radar at 120' elevation about 400' away from my main tower. I have 7 GHz. dishes at 500' and 700' on the main tower. Before that I had 2 GHz. dishes at the same elevations. The major problem I have with the microwaves is temperature inversions, I've never seen any interferenc...
by mruwave
Wed Jul 11, 2012 7:55 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Motorola Duplexer Identification
Replies: 15
Views: 1396

Re: Motorola Duplexer Identification

IIRC, these are Motorola T1500 UHF series cans, but I've never seen a duplexer configured this way. Typically there are 2 connectors on each can and specific length cables connecting the cans together. I've never seen a 1500 series duplexer with UHF connectors either. All fo them I've worked on have...
by mruwave
Thu Jun 07, 2012 5:31 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: MSF5000 PA Problem
Replies: 8
Views: 614

Re: MSF5000 PA Problem

Could it be something as simple as the reference voltage on the power set pot? Does the wiper voltage change as you change the power setting? Is the filter cap on the reference side blown or shorted? Is the dropping resistor on the reference side open? Is the low side ground open?
by mruwave
Wed May 02, 2012 11:23 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Identify older Motorola
Replies: 1
Views: 463

Re: Identify older Motorola

Sounds like one of the old G-lines. Pictures would help.
by mruwave
Tue Aug 16, 2011 10:18 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Motorola Motrac Help
Replies: 8
Views: 1722

Re: Motorola Motrac Help

IMHO, the MHT series are, pound for pound, the best radios Mother M made. Good luck, though, changing frequency ranges and if the Permakay filter goes you're SOL, as far as I know. Excellent receivers, ultimately repairable, great audio. I was lucky enough to order the replacement helicals when &quo...
by mruwave
Mon Aug 15, 2011 10:08 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: What to use to clean radios ?
Replies: 27
Views: 1867

Re: What to use to clean radios ?

I agree with using Plexus!! Just be aware that it is slightly abrasive, so wipe in horizontal or vertical direction only, and always go the same direction. If you wipe H one time and V the next it WILL eventually cloud a display screen.

- Jim
by mruwave
Tue Nov 30, 2010 9:02 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: T5600 - two microphones?
Replies: 1
Views: 300

Re: T5600 - two microphones?

Wire the mikes in parallel, but make sure the PTT on each mike switches its mike element off when released. - Jim
by mruwave
Thu Jul 01, 2010 7:42 am
Forum: Vehicle Radio Installs
Topic: Motorcycle Installs
Replies: 4
Views: 1514

Re: Motorcycle Installs

Wow!! What a vault of information on the pvpcom.com site!!! Gives me lots of ideas for configuring MY bike. I have several GP300s and M1225s for the commercial radio. Was thinking about using my FT-50 as the amateur side, and I was planning to use the hole for the AM/FM for a mixer/control panel. I ...
by mruwave
Wed May 19, 2010 8:03 am
Forum: Vehicle Radio Installs
Topic: Motorcycle Installs
Replies: 4
Views: 1514

Motorcycle Installs

Haven't seen much on this subject, and I know there's got to be a lot of expertise in this area here. I recently bought an '06 ex-police Electra-Glide. Love the bike, and Harley provides special harnesses for the radio, siren and lights. I have the manuals for the bike, including the Harley harnesse...
by mruwave
Tue Dec 22, 2009 10:42 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Most Rugged Motorola Equipment
Replies: 49
Views: 4759

Re: Most Rugged Motorola Equipment

The HT220 was, IMHO, virtually indestructable...finicky to get tuned and working, though and a real pain to repair. I carried an MX330S for years with NO problems. Only weak point was the flex circuit.
by mruwave
Sat Nov 14, 2009 2:44 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Good Tower engineering company?
Replies: 18
Views: 537

Re: Good Tower engineering company?

Add hoisting grips every 200 feet or so of line, plus one at the top for securing to the tower with a quick-link or the like.

- Jim
by mruwave
Fri Nov 13, 2009 3:13 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Good Tower engineering company?
Replies: 18
Views: 537

Re: Good Tower engineering company?

I'd ask the Chief Engineer at KWCH who they use and try to work through that rigger. That way the station doesn't have someone unfamiliar with their tower on it. Most riggers can readily give you a list of parts/pieces you'll need to attach the line to the tower properly. Do a little research in the...
by mruwave
Tue May 26, 2009 2:29 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: microwave path testing?
Replies: 11
Views: 716

Re: microwave path testing?

Any good supplier should have the ability to give you a case study on each of your planned links. Most will do it for free just to get a chance to bid on the equipment and installation. Some are extremely reliable and some are speculation. If they won't give you a printout, they're probably just spe...
by mruwave
Thu Apr 09, 2009 10:02 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Wiring Help
Replies: 5
Views: 3017

Re: Wiring Help

When I first started flagging for the SCCA, I didn't particularly care for the brand of headsets they used. They have an analog multichannel system, conventional tone PL in / DCS out on VHF. I 'eBayed' a decent looking David Clark headset. The earpieces are 300 ohms each. I paralleled them together ...
by mruwave
Wed Mar 25, 2009 8:39 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Favorite form factor?
Replies: 21
Views: 1329

Re: Favorite form factor?

I fully realize that I'm an old fart, but my hand fits perfectly around a high power HT220!!!! If you can't get to your pistol, you can use it to incapacitate the perp, and it'll still work when you call in to have a call for assistance downgraded. Besides, they just look cool. Second place goes to ...
by mruwave
Tue Mar 10, 2009 10:28 am
Forum: Computer/Technical Assistance
Topic: laptop hard drive recovery
Replies: 7
Views: 2538

Re: laptop hard drive recovery

An alternative I've used for years is here: http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=1086960&Sku=M501-1030 ...$10 bucks and you get a permanent enclosure. If all else fails, there's an old serial transfer program called 'Fastwire' that works very well....slow, b...
by mruwave
Wed Feb 11, 2009 8:46 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Logging software
Replies: 3
Views: 509

Re: Logging software

Investigate this:

http://www.davee.com/scanrec/

I have not used this software, but if it works its pretty cool. Only 2 recording channels though.
by mruwave
Thu Jan 29, 2009 8:55 am
Forum: Legacy Batboard Motorola ASTRO (VSELP/IMBE/AMBE) Equipment Forum
Topic: Managing users on Smartzone System
Replies: 14
Views: 615

Re: Managing users on Smartzone System

How about setting up zones by county? Sounds like your talking about Highway Patrol, yes? North Carolina has 100 counties. If I were given this scenario, I would consider setting up 100+ zones, with each of the local agency interop channels within the zone. Officers are usually pretty aware of count...
by mruwave
Mon Oct 13, 2008 11:15 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Relays via ethernet
Replies: 4
Views: 369

Re: Relays via ethernet

Rob,

Contact me at mruwave@nc.rr.com. I have several of these units (prototype) in operation and they seem quite reliable.

- Jim
by mruwave
Mon Sep 22, 2008 2:32 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Motrac Service Manual
Replies: 4
Views: 649

Re: Motrac Service Manual

I have several....LB? VHF? UHF??
by mruwave
Wed Aug 06, 2008 7:09 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: HELP! Microwave link dish questions
Replies: 13
Views: 1279

Re: HELP! Microwave link dish questions

All the guys above pretty much nailed it. Looking at the Andrew (now Commscope) catalog, a 10' gridpak at 2.1 GHz. will have a midband gain of 32.8 dbi with a beamwidth of 3.7 degrees. A 6' solid 'Standard' dish will have 29.4dbi gain with a 5.5 degree beamwidth. A 6' solid 'High Performance' antenn...
by mruwave
Fri Jul 25, 2008 10:36 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: swr/watt meter
Replies: 11
Views: 966

Re: swr/watt meter

Spend the bucks and buy a Bird and the slugs!! Recently I had the company's fancy HP power meter refuse to 'zero'. The closest available replacement was 26 miles away. I went home and picked up my 45 year old Bird and easily finished the job. They aren't cheap, and its a pain in the butt to have to ...
by mruwave
Tue Mar 11, 2008 9:39 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Jedi - RX problem - can I swap RF board with similar model?
Replies: 7
Views: 483

Re: Jedi - RX problem - can I swap RF board with similar model?

I've heard a similar sound when the radio is in 'SCAN' mode. Is that possible?
by mruwave
Wed Feb 27, 2008 8:59 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Trunking Vs. Conventional - What would you do?
Replies: 19
Views: 881

Re: Trunking Vs. Conventional - What would you do?

Several questions I haven't seen asked or answered thus far.... Is LE looking for additional operational functions (in-the-field computers)? Is the municipality thinking about adding additional users (buses, garbage trucks, school buses, meter maids)? Is there a real danger of jamming the analog sys...

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