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Search found 1182 matches

by Jonathan KC8RYW
Sun Aug 17, 2014 9:33 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: GP300 for low-profile repeater transmitter/receiver?
Replies: 6
Views: 1852

Re: GP300 for low-profile repeater transmitter/receiver?

wd9cms wrote:This should help:

http://www.w8ak.com/portrptr/index.html

W8AK has made a repeater out of GP300's and describes how he did it.

Doesn't really help because there's no schematics of where they tapped the discriminator or where they found a place to inject flat tx audio.
by Jonathan KC8RYW
Sun Aug 17, 2014 9:33 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: GP300 for low-profile repeater transmitter/receiver?
Replies: 6
Views: 1852

Re: GP300 for low-profile repeater transmitter/receiver?

tsunami_australia wrote:If you're looking at making it a repeater wouldn't you be better just to hook it to a small controller of some sort externally?

I'm looking to connect it to a DMK URIx sound fob dealie to use app_rpt.
by Jonathan KC8RYW
Sun Aug 17, 2014 9:23 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Syntor X9000 VHF -- bandwidth? Codeplug EEPROM?
Replies: 6
Views: 1259

Syntor X9000 VHF -- bandwidth? Codeplug EEPROM?

Question. I've heard a lot about how lowband X9000 radios can work 6m AND 10m out of the box. What's the bandwidth of a VHF unit like? If I'm using a VHF X9000 on 144.39 MHz, so I need to retune? Also, does anyone know what type of EEPROM the codeplug is stored on? I've read that one can simply copy...
by Jonathan KC8RYW
Sun Jul 20, 2014 11:12 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: GP300 for low-profile repeater transmitter/receiver?
Replies: 6
Views: 1852

GP300 for low-profile repeater transmitter/receiver?

I seem to remember the GP300 having a connector at the bottom for optional add-on boards, like aftermarket signalling and such.

Does anyone have the pinout for that?

And does anything need to be enabled in the radio?

Thanks.
by Jonathan KC8RYW
Mon Jun 16, 2014 7:59 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Off topic: Kenwood TK-790 low-power setting with AllStar?
Replies: 1
Views: 229

Off topic: Kenwood TK-790 low-power setting with AllStar?

I've read that Kenwood TK-790's will do 5 watts on low-power transmit. Does anyone know if there is a duty-cycle limit? I'm used to Motorola radios like Maxtracs and GM300's that tend to run hot or even hotter than high power while at low power. Anyone know if the TK-790 will do 5 watt transmit for ...
by Jonathan KC8RYW
Fri Feb 14, 2014 9:33 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Motorola Oddballs through the years
Replies: 307
Views: 79757

Re: Motorola Oddballs through the years

Anyone ever see a Motorola MoTrar20? Basically, it was a Type I trunked radio that used crystals inside an oversized Maxar 80 housing. I got one in a trade, and pitched it. Sorry if I made any of you guys cry. Oh, look, there's one on eBay right now. No, I'm not related to this auction at all. http:...
by Jonathan KC8RYW
Sun Feb 09, 2014 2:31 pm
Forum: Vehicle Radio Installs
Topic: To spring or not to spring a Larson NMO antenna?
Replies: 7
Views: 1897

To spring or not to spring a Larson NMO antenna?

Planning a mobile install.

Since it's a hatchback with a sunroof, I'll be doing two L-bracket mounts near the hood with NMO's.

I'm planning on using Larson 5/8 wave VHF antennas.

Larson has optional springs you can buy.

What are the pros or cons to using springs?

Thanks, guys!
by Jonathan KC8RYW
Thu Feb 23, 2012 4:32 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Moden 36 encoder set up
Replies: 3
Views: 416

Re: Moden 36 encoder set up

It's your lucky day. I have a Moden36 manual for sale. PM me if interested. Thanks.
by Jonathan KC8RYW
Tue Feb 21, 2012 9:27 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Spectra Repeater
Replies: 14
Views: 2409

Re: Spectra Repeater

Will wrote:Josh,

That old way is so obsolete now.

What's the new way?
by Jonathan KC8RYW
Tue May 24, 2011 12:28 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Motorola Syntor X9000 to Syntor X conversion for APRS?
Replies: 4
Views: 924

Motorola Syntor X9000 to Syntor X conversion for APRS?

I went to Hamvention with a Syntor X VHF T73 or T83 on my list for a single-mode APRS radio. Sure, they're pretty ancient, but they're at least 100 Watts, they are very well heatsinked and are at least fairly reliable. Also, they're easy to convert to an APRS radio. APRS, in case you're not familiar...
by Jonathan KC8RYW
Thu Jan 27, 2011 11:31 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Nucleus to Quantar Conversion?
Replies: 16
Views: 874

Re: Nucleus to Quantar Conversion?

What I'm wondering is if one could take a Nucleus and, even with much tinkering, turn it into a P25 repeater. No analog audio at all.
by Jonathan KC8RYW
Sat Oct 23, 2010 10:02 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Zetron Model 42 and 49 LTR Controller Help
Replies: 2
Views: 597

Zetron Model 42 and 49 LTR Controller Help

Hey, gang. I've been going back and forth with Zetron's various product specialists, trying to find the Multibase software for some 16 year old LTR controllers. They've been very helpful; but it seems like they're having trouble figuring it out. They've had to do paper-searches through their old fil...
by Jonathan KC8RYW
Fri Aug 13, 2010 9:25 am
Forum: Experimental and Next Generation LMR
Topic: 33cm LTR System RF Diagram (draft)
Replies: 3
Views: 747

Re: 33cm LTR System RF Diagram (draft)

Only problem I see is that you need the cans before and after the preamp. You've got to keep it from going into compression and amplifying anything near it. Why are the cans after the receive multicoupler? Thanks for the feedback! I revised the diagram, and put your suggestions into it. http://www....
by Jonathan KC8RYW
Fri Aug 13, 2010 8:17 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Nucleus to Quantar Conversion?
Replies: 16
Views: 874

Nucleus to Quantar Conversion?

Can someone please confirm or deny that a Nucleus paging base station can be converted into a Quantar base station capable of IMBE?
by Jonathan KC8RYW
Thu Jun 03, 2010 2:00 pm
Forum: Experimental and Next Generation LMR
Topic: 33cm LTR System RF Diagram (draft)
Replies: 3
Views: 747

33cm LTR System RF Diagram (draft)

http://www.kc8ryw.net/900ltr/900ltr.gif

Comments welcome.

I planned for horizontal separation due to roof-top site.
by Jonathan KC8RYW
Wed Jun 02, 2010 5:34 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: best cable for the job
Replies: 5
Views: 213

Re: best cable for the job

What if the feedline becomes the antenna? Andrew Radiax.
by Jonathan KC8RYW
Thu May 27, 2010 10:08 am
Forum: Experimental and Next Generation LMR
Topic: 900mhz Amateur Smartnet
Replies: 47
Views: 3563

Re: 900mhz Amateur Smartnet

Or... use LTR and not have to worry about a 100% duty control channel. 8) From what I understand from LTR, if the home repeater is sending out a MCW ID, it can still respond to requests, and tell the mobile user to another repeater that's free. Conversations moving from channel to channel for mobile...
by Jonathan KC8RYW
Sun May 23, 2010 6:48 pm
Forum: Radio Programming
Topic: GTX Service Frequencies - Changing them
Replies: 0
Views: 885

GTX Service Frequencies - Changing them

Stock GTX.EXE puts the service frequencies in the 900 SMR band, not where the 33cm repeater split action is. Need a fix for changing the internal programming points in service mode for putting it right in 33cm 25 mhz split bands? I think I've figured out where it puts those points in GTX.EXE. Get ou...
by Jonathan KC8RYW
Sun May 23, 2010 1:22 pm
Forum: Radio Programming
Topic: GTX LTR -- trunking channel numbers
Replies: 2
Views: 1541

Re: GTX LTR -- trunking channel numbers

OK, seems to be working in Site Block.

Channel 001 - 079 are in the 33cm band.
by Jonathan KC8RYW
Sun May 23, 2010 1:11 pm
Forum: Radio Programming
Topic: GTX LTR -- trunking channel numbers
Replies: 2
Views: 1541

Re: GTX LTR -- trunking channel numbers

I received some assistance, and wanted to share. I think I figured out which values need to be changed in GTX.EXE. Get out Hex Workshop. Use the base converter. All values are Intel double(64) 1. CHANGE 00041D99 FROM 0000000000008C40 (896) TO 0000000000308C40 (902) 2. CHANGE 00041DA1 FROM 66666666E6...
by Jonathan KC8RYW
Thu Dec 17, 2009 4:28 pm
Forum: MotoTRBO Portables and Mobiles (4xxx/6xxx) 1.0 Series Subscribers
Topic: future of MotoTrbo? You guys wanna validate the information
Replies: 9
Views: 1104

Re: future of MotoTrbo? You guys wanna validate the information

transistor747 wrote:In a webinar yesterday, Motorola said "Connect Plus" multi-site digital trunking for Trbo is slated for next year sometime. There was no talk about what external equipment may be required.

Read the System Planner PDF.

It talks about Connect Plus.
by Jonathan KC8RYW
Thu Dec 17, 2009 3:47 pm
Forum: MotoTRBO Portables and Mobiles (4xxx/6xxx) 1.0 Series Subscribers
Topic: Base Station Identifications (BSI)
Replies: 4
Views: 520

Base Station Identifications (BSI)

I just got done looking at the MOTOTRBO System Planners PDF. The thing that I found most interesting is no one at Motorola implemented base station ID into the data sent by the repeater. The repeater has to drop into analog mode to send the ID as MCW, therefore taking down communications from the su...
by Jonathan KC8RYW
Tue Nov 10, 2009 8:14 pm
Forum: Experimental and Next Generation LMR
Topic: 900mhz Amateur Smartnet
Replies: 47
Views: 3563

Re: 900mhz Amateur Smartnet

I already have three Zetron LTR controllers. Two Z42 and a Z49. If anyone has a manual for these in PDF I'd appreciate it. Ham trunking on 900 has been on my back burner for a few years. The main hold-up is that I have yet to figure out how to get GTX 900 LTR portables and mobiles to actually transm...
by Jonathan KC8RYW
Thu Sep 18, 2008 4:41 pm
Forum: Vehicle Radio Installs
Topic: Icom IC-F1821D Mobile Mounting Bracket
Replies: 1
Views: 677

Icom IC-F1821D Mobile Mounting Bracket

Does anyone have a part number?

Thanks.
by Jonathan KC8RYW
Thu Sep 18, 2008 4:29 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Zetron 15 pin terminal strips
Replies: 1
Views: 237

Zetron 15 pin terminal strips

Does anyone have a P/N for these from Mouser?

They are used in the Zetron Model 38 and 42 to name two.
by Jonathan KC8RYW
Wed Aug 13, 2008 5:00 am
Forum: Radio Programming
Topic: GTX LTR -- trunking channel numbers
Replies: 2
Views: 1541

GTX LTR -- trunking channel numbers

In the RSS, it seems to convert the frequency entered in the trunking personality into the FCC channel number.

You can program it for out of band, program, and still be stuck with the closest FCC channel number.

Where is the magic list stored? The RSS or the firmware?
by Jonathan KC8RYW
Tue Jul 22, 2008 10:21 pm
Forum: Converting Motorola Equipment to 900MHz Amateur
Topic: Low Power MaxTrac 900
Replies: 1
Views: 2230

Low Power MaxTrac 900

I'm looking to make the MaxTrac 900 12W into something more reliable with lower power (without worrying about a PA burning up) for a repeater transmitter. The VHF and UHF LPI Maxtracs just lack the last section of the PA. But the Maxtrac 900 PA has the last three sections together in the same RF hyb...
by Jonathan KC8RYW
Sat Mar 15, 2008 1:00 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: CA3140E
Replies: 3
Views: 435

CA3140E

The CA3140E is NLA at Mouser.

It subs to NTE7144.

The NTE7144 datasheet says it subs to the 741.

???

Which opamp do I use for my RIB? I don't need it now, but I'm putting in a Mouser order, so why not pick up a few spares incase I blow up an Opamp with a homebrew cable.
by Jonathan KC8RYW
Wed Nov 14, 2007 6:40 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: SSM Programming Cable
Replies: 2
Views: 313

Re: SSM Programming Cable

Oh, alright. Now that you mention it, I remember seeing that cable. Thanks again!
by Jonathan KC8RYW
Fri Nov 09, 2007 8:24 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: SSM Programming Cable
Replies: 2
Views: 313

SSM Programming Cable

Anyone have a pinout?
by Jonathan KC8RYW
Wed Nov 07, 2007 9:12 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: What are the minimum connections needed for a Spectra?
Replies: 7
Views: 601

Re: What are the minimum connections needed for a Spectra?

Here is what I've come up with: 5 WHI 17 Bus + (RS-422 Input/Output) 11 Shield 13 Mic. Low 12 BLK/YEL 12 Mic. Hi (Input) 14 BLK 50 Bus - (RS-422 Input/Output) 18 BLU 49 Digital Ground 19 BLK/ORG 26 Reset (Input/Output) 21 Shield Bus Shield 22 YEL 48 Switched B+ (Input) 23 BLK/RED 33 Busy (Input/Out...
by Jonathan KC8RYW
Wed Nov 07, 2007 3:13 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: What are the minimum connections needed for a Spectra?
Replies: 7
Views: 601

Re: What are the minimum connections needed for a Spectra?

Yeah, I did buy one off you.

But that's being used for the Astro Spectra.

This home-brew cable is for the Analog Spectra.
by Jonathan KC8RYW
Tue Nov 06, 2007 11:46 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: What are the minimum connections needed for a Spectra?
Replies: 7
Views: 601

What are the minimum connections needed for a Spectra?

Here is what I've come up with: 5 WHI 17 Bus + (RS-422 Input/Output) 11 Shield 13 Mic. Low 12 BLK/YEL 12 Mic. Hi (Input) 14 BLK 50 Bus - (RS-422 Input/Output) 18 BLU 49 Digital Ground 19 BLK/ORG 26 Reset (Input/Output) 21 Shield Bus Shield 22 YEL 48 Switched B+ (Input) 23 BLK/RED 33 Busy (Input/Outp...
by Jonathan KC8RYW
Wed May 16, 2007 10:51 am
Forum: Converting Motorola Equipment to 900MHz Amateur
Topic: 902 Repeaters at Hamvention
Replies: 9
Views: 2451

The 927.4875 repeater will not be on the air this year.
by Jonathan KC8RYW
Tue May 15, 2007 4:43 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Help : MOCOM 70 LIGHTBULB
Replies: 5
Views: 485

Lightbulbs?

You mean the tubes?

:lol:
by Jonathan KC8RYW
Wed May 09, 2007 8:45 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Dayton 2007: The Dinner
Replies: 16
Views: 1837

Yeah, I'll be there.
by Jonathan KC8RYW
Tue Apr 17, 2007 10:41 am
Forum: Vehicle Warning Equipment Discussion
Topic: LED Lightbars...UGGGHH!!!!
Replies: 17
Views: 5382

Even Michigan SP is moving (slowly) to LED. I've seen slick-top MSP cars with nothing but LEDs inside and hide-a-way strobes. Though I don't expect to see the fall of the "Big Red Gumball" anytime soon. The local PD here has a few cars out in the past month or so with LED bars replacing th...
by Jonathan KC8RYW
Sun Apr 15, 2007 2:59 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Impress Charger Firmware upgrade
Replies: 21
Views: 5477

theplague wrote:Idaho

I didn't know anyone actually lived in Idaho. :P
by Jonathan KC8RYW
Thu Apr 12, 2007 6:05 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: MotoTurbo, how secure is it?
Replies: 34
Views: 6210

Re: MotoTurbo, how secure is it?

Just wonder how "secure" the digital audio is on MotoTrbo. I'm not talking about a high level of security, just a level of difficulty higher than most people are willing to invest. I have some taxi's that are interested in thwarting the competition with scanners scooping their calls. Anyo...
by Jonathan KC8RYW
Tue Apr 10, 2007 8:26 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Best headsets for noisy areas ( 160db)
Replies: 8
Views: 567

David Clark?
by Jonathan KC8RYW
Tue Apr 10, 2007 10:35 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Interesting Maxtrac firmware/codeplug IC
Replies: 4
Views: 450

I have an 800 MaxTrac with a similar Dallas module -- DS1220AB. The radio was modified heavily -- DB15 running out the back, traces cut, etc. It has an 27C256 EPROM that says Motorola RADIUS DIVISON Version 62.02. I guess I could read it on the E/EPROM programmer if anyone cared for me to take a loo...
by Jonathan KC8RYW
Sat Apr 07, 2007 3:42 am
Forum: Converting Motorola Equipment to 900MHz Amateur
Topic: GTX 900 -- will mic lines on 16-pin get HearClear'd?
Replies: 5
Views: 2123

The GTX doesn't do reverse burst well on transmit.

http://www.repeater-builder.com/motorol ... _info.html

Image
by Jonathan KC8RYW
Fri Apr 06, 2007 6:44 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Kenwood buys Zetron!
Replies: 8
Views: 774

Josh wrote:It's another way that Asia is taking our jobs and money.

I wonder how long it will take for Kennywood to transfer production to asia so we can import it.

-Josh

Silly isolationist.
by Jonathan KC8RYW
Fri Apr 06, 2007 9:43 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Impress Charger Adapter for HT1250?
Replies: 3
Views: 751

I asked this same question before and got no
where. I hope you have better luck.
by Jonathan KC8RYW
Sat Mar 31, 2007 4:07 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Good Cheap Source Of SLA Batteries?
Replies: 3
Views: 348

Re: Good Cheap Source Of SLA Batteries?

spareparts wrote:
Jonathan KC8RYW wrote:Does anyone have a favorite?

I figured I might get some tips here since some sites use them.

Thanks!


What size? (form factor & AH)?

Generic sizes: 12V 7AH, 12V 12AH, 12V 18AH.

They're for UPSs.

...and hamabouts.
by Jonathan KC8RYW
Sat Mar 31, 2007 1:03 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Good Cheap Source Of SLA Batteries?
Replies: 3
Views: 348

Good Cheap Source Of SLA Batteries?

Does anyone have a favorite?

I figured I might get some tips here since some sites use them.

Thanks!
by Jonathan KC8RYW
Mon Mar 26, 2007 9:47 pm
Forum: Legacy Batboard Motorola ASTRO (VSELP/IMBE/AMBE) Equipment Forum
Topic: Astro Saber Priority Scan Issue
Replies: 3
Views: 302

Re: Astro Saber Priority Scan Issue

Josh wrote:Here's an idea..... don't use priority scan.

Sheesh, you only have 2 channels in that radio anyhow, I wouldn't listen to one of them (146.76) EVER.

-Josh

Not when I go to Dayton. :wink:

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