Batboard

Jonathan KC8RYW

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.

Jonathan KC8RYW

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.

Jonathan KC8RYW

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...

Jonathan KC8RYW

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.

Jonathan KC8RYW

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 ...

Jonathan KC8RYW

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:...

Jonathan KC8RYW

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!

Jonathan KC8RYW

It's your lucky day. I have a Moden36 manual for sale. PM me if interested. Thanks.

Jonathan KC8RYW

Will wrote:Josh,

That old way is so obsolete now.

What's the new way?

Jonathan KC8RYW

Anyone tried this one: http://www.cutratebatteries.com/battery ... s/M343L3-D

Jonathan KC8RYW

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...

Jonathan KC8RYW

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.

Jonathan KC8RYW

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...

Jonathan KC8RYW

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....

Jonathan KC8RYW

Can someone please confirm or deny that a Nucleus paging base station can be converted into a Quantar base station capable of IMBE?

Jonathan KC8RYW

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

Comments welcome.

I planned for horizontal separation due to roof-top site.

Jonathan KC8RYW

What if the feedline becomes the antenna? Andrew Radiax.

Jonathan KC8RYW

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...

Jonathan KC8RYW

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...

Jonathan KC8RYW

OK, seems to be working in Site Block.

Channel 001 - 079 are in the 33cm band.

Jonathan KC8RYW

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...

Jonathan KC8RYW

http://www.danimex.com/Files/Billeder/2 ... lanner.pdf

Jonathan KC8RYW

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.

Jonathan KC8RYW

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...

Jonathan KC8RYW

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...

Jonathan KC8RYW

Does anyone have a part number?

Thanks.

Jonathan KC8RYW

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

They are used in the Zetron Model 38 and 42 to name two.

Jonathan KC8RYW

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?

Jonathan KC8RYW

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...

Jonathan KC8RYW

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.

Jonathan KC8RYW

Oh, alright. Now that you mention it, I remember seeing that cable. Thanks again!

Jonathan KC8RYW

Anyone have a pinout?

Jonathan KC8RYW

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...

Jonathan KC8RYW

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.

Jonathan KC8RYW

Making my own cable.

Jonathan KC8RYW

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...

Jonathan KC8RYW

The 927.4875 repeater will not be on the air this year.

Jonathan KC8RYW

Lightbulbs?

You mean the tubes?

Jonathan KC8RYW

Yeah, I'll be there.

Jonathan KC8RYW

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...

Jonathan KC8RYW

theplague wrote:Idaho

I didn't know anyone actually lived in Idaho.

Jonathan KC8RYW

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...

Jonathan KC8RYW

David Clark?

Jonathan KC8RYW

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...

Jonathan KC8RYW

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

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

Jonathan KC8RYW

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.

Jonathan KC8RYW

I asked this same question before and got no
where. I hope you have better luck.

Jonathan KC8RYW

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.

Jonathan KC8RYW

Does anyone have a favorite?

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

Thanks!

Jonathan KC8RYW

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.

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