Repeater Interface Question.

[Max]

Has anyone tried one of these items and made it work ?
From what the seller is saying,it as simple as plug and play.No changes have to be do to the radio with the RSS.

http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... K:MEWAX:IT


Thanks
Max

[Max]

Thought i would ask if there are any members in Canada that could tune the duplexer for a reasonable price.

Max

[HLA]

they do work. I havn't used that one but i've used the one made by the same people that works both directions and has adjustable hang time, it only cost about $7 more

[arnu]

I used them for testing - they work.
They are in fact very simple - more or less two connectors and a variable resistor for volume control.
No documentation comes with them - so you need to figure out the COR / PTT pins yourself.
You will need to program the radio's accessory pins properly for them to work though.

Bidirectional / cross band version.

Code: Select all

RxAudio ----/\/\/\---- TxAudio
TxAudio ----/\/\/\---- RxAudio
GND --------------------- GND
COR --------------------- PTT
PTT --------------------- COR

Alfred.

[Max]

I will be using 2 GM300's and was looking in the RSS to find where to program the accessory pins.
I was not able to find the location,any suggestions ?


Max

[Max]

Forgot to ask if using a 8 channel GM300 and a 16 channel GM300 will i run into any problems.

[Max]

I'm guessing because one of the GM300's is only a 8 channel it has a (two-layer) logic board.There for i can not program the accessory connector.

[K8TEK]

I'm guessing because one of the GM300's is only a 8 channel it has a (two-layer) logic board.There for i can not program the accessory connector.

You can if it has the 16 pin accessory connector. It sounds like you have a 5 pin.

[Spiffy50]

I used the same thing in a VERY ghetto-fab sort of way. A customer uses 900MHz GTX radios on a Privacy Plus and wanted to have a mobile repeater of sorts as the portable coverage on the system is terrible, but didn't want to shell out the money. One of these and a UHF SM50 later, they had a solution. Yes I know it isn't perfect as you won't know if the system is busy, but this customer is a security business and is primarily busy after hours, when all the couriers and delivery people have gone to bed.

[wavetar]

I'm guessing because one of the GM300's is only a 8 channel it has a (two-layer) logic board.There for i can not program the accessory connector.

You can if it has the 16 pin accessory connector. It sounds like you have a 5 pin.

There's no such thing as a 5-pin GM300, they are all 16-pin. The 8-channel versions do not have the accessory programming fields in the RSS, although you can use them as part of a GR300 setup by changing the RSS to 'repeater' mode and programming them that way.

[Max]

After programming in repeater mode,would i leave the radio in that mode,or change it back.



Max

[Max]

Ok,i have it working,thanks for all the help.One more question,when using a dulexer and your tx is 462.xxxx and rx 467.xxxx what would be the best way to tune the antenna ?
Meaning right inbetween ?


Max

[Satelite]

Hello :
You would tune the antenna to the transmit freq of 462.xxxx.
Best to have antenna tuned dead on for transmit as rx doesnt matter in your case.
Satelite

[Spiffy50]

FRS repeaters are illegal, Max!

Ideally you'd tune the antenna for the TX frequency. What type of antenna are you using? A good repeater-grade antenna would be rated for at least 5MHz of bandwidth, in which case it would work just fine with very little degredation 5MHz up on the RX frequencies. Or, space depending you could use a separate antenna for RX and TX.

[Max]

I'll be using just a 5/8 over 1/4 wave up about 250 feet.

[Satelite]

Hello:
Just because Max said 462.XXXX doesnt mean its FRS.
GMRS falls on the 462 and 467 mhz splits and repeaters there are legal.
satelite

[motorola_otaku]

OP is in Canada, where there is no such thing as GMRS. For the purposes of discussion we'll just assume he's on a legally-licensed 462 MHz business pair.

I have seen those "kits" used before.. they're okay for a temporary throw-down repeater I guess but I wouldn't use one in a permanent installation. For one thing, there is no real audio gain control (no, a trimmer pot does not a gain control make) and you can definitely tell the difference in audio quality between using one of those and a RICK box. Second, there is no hang time, at all. Third, the soldering is flimsy as hell.

[Max]

The frequencies i used in my original post where merely examples,and in no way were intended to be used as actual frequencies.
I hope this clears up any confusion.


Max