Telex IP223 with Motorola radios

[g8tzl2004]

I have downloaded various manuals and have been researching using the Telex IP223 with my various Motorola radios.

Has anybody used an IP233 to set up a basic repeater?

Anybody have any other suggestions for possible projects with an IP223?

Many of the possible application downloads from the Telex site have restricted access.

Thanks

[ve3nsv]

The possibilities are endless with the IP-223 but its an awfully expensive repeater controller.

[g8tzl2004]

I've read about crossband repeaters using the IP223 but I'm not sure if you have to use 2 units?

Can you set up a simple VHF only (not cross band) repeater using just one IP233 ?? (with a duplexer of course).

Is it possible to program a call sign and time out etc...although all I really need is straight talk thru...although I know I can do this with a $10 patch cable and 2 GM300's etc.

Any other simple projects with an IP223?

Thanks

[wavetar]

One unit controls two radios, so it's all you need for a regular or crossband repeater. I have a ton of app notes for a number of different radios connecting to the IP223...and you'll need them because there's about a dozen jumper settings and even potential solder bridges that may be needed depending on what you're connecting to. PM me for particular radios & I'll get them to you, if they exist.

[Bill_G]

I'll second the "expensive repeater controller" idea, but yes, it could be done if you can live with the audio delay ... audio delay. I've done it ... done it.

It will require two radios. Pick a band, any band, could be the same band, could even be a UHF repeater split. And then you set up the physical connections between the IP223 and the radios. And then you set up the IP223 ip information (ip addy, multicast addys, etc). And then you set up the crosspatch table using those multicast addys. And then you set levels. It works fine. Does not need CSoft to crosspatch. And with the latest version of firmware, you can crosspatch within the same IP223 (earlier versions prevented you from crosspatching from radio port 1 to radio port 2).

But, there are simpler and cheaper ways to do it.

I would select an IP223 if I had a rack full of radios on various systems that I wanted to patch together for a purpose, and then unpatch when the purpose was done.

[g8tzl2004]

Thanks Bill and Wavetar for the feedback.

Wavetar - as requested I have sent you a PM re. CDM mobile set up with a IP223.

Are there any other "must read" manuals I should be looking at...maybe something more general re. the IP223?

Can you use the IP223 as a single frequency simplex repeater..also called a "parrot box"?

Thanks

[Bill_G]

You are welcome.

parrot box = negative.

It does not do store and forward.

[Jim202]

Thanks Bill and Wavetar for the feedback.

Wavetar - as requested I have sent you a PM re. CDM mobile set up with a IP223.

Are there any other "must read" manuals I should be looking at...maybe something more general re. the IP223?

Can you use the IP223 as a single frequency simplex repeater..also called a "parrot box"?

Thanks

One comment that I would pass along, that many people just don't understand about. Some interfacing documentation that you will find uses the speaker output connections on the Motorola radios. This is a bad choice. Reason being is that the audio level is being controlled by the volume control setting. Each time it is moved, you just changed the audio level on the patch being used. Second reason is that you don't want to ground either the high side or the low side of the speaker output connections. You will blow the audio output stage in the Motorola radio if you do.

A better connection point is using the "filtered RX audio" output. This level doesn't change with the local volume control settings. It does have a DC bias on it so you will need to make sure your connection is through a coupling capacitor. Been a while since I have played with the IP223. So can't remember if the input and output circuits have built in coupling capacitors or not. b

Then use the "AUX MIC" input to put audio into the transmitter. This connection also has a DC bias on it. So again, you will need a coupling capacitor to make sure you don't ground out the DC voltage. Many of the Motorola radios have an external mic gain that can be adjusted up or down to work with the audio level your using to feed the transmitter. This level is adjusted with the radio programming software.

Have at it and let us know how you make out. Like others have said, there are much cheaper repeater audio control circuits than using an IP223 to work as a repeater interface.

Jim

[Bill_G]

Jim - IP223's use good, old fashioned telco transformers with berg jumpers to set the impedance, and single ended or balanced inputs and outputs. Their application notes discuss the best choices for specific models of radios (hi z, lo z, etc).