Cross band repeater

[WSEL330]

How'dy folks,

Based on another topic regarding using GMRS and Ham on the same radio, I think it was my question about what my UV-5RM was. 

Preface:

Assuming use case is moot or whatever

Assuming I have the correct antennas

Assuming I have two radios from the same manufacturer

Assuming one has both licenses

Questions:

1)Can one set up a repeater to RX GMRS and then TX to HAM or vise versa?

2)Would one use a duplexer?

3)Could a duplexer be tuned to two totally different bands?

4) Based on discussion on the UV-5RM would the freakshow over seeing us have a problem with that type of repeater?

Asking for a friend...

[WRYZ926]

Yes it will work. The issue is that the FCC doesn't allow cross band repeating or linking different services. While your GMRS call sign gives you privileges on GMRS channels they don't give you privileges on the amateur bands. And an amateur license does not give you privileges on GMRS. It doesn't matter if you have both licenses or not.

We tested some dual band amateur mobile radios with cross band repeat that were MARS Modded and yes you can cross band from GRMS to 2m. I don't suggest doing it though. You will get the attention of the sad hams and sad GMRS curmudgeons really quick by doing this. And again not permissible by the FCC.

[WRYZ926]

We transmitted into dummy loads as part of a test of our emergency communications trailer. So unless someone was really close to the trailer, no one heard us when transmitting into a dummy load. 

[nokones]

When it comes to radio electronics nothing is impossible as long as you have the funds and the know how. It is really basically manipulating electrons and passing audio from one device to another device. Crossbanding in-band and out-of-band multiple radio devices can be accomplished in several ways, audio tie with a logic controller, voting comparator using COR, console patch, or an interoperability gateway.

I've designed several crossband package configurations back in the 70s, 80s, and early 90s and some of them have been written up in various trade magazines. Back in the early 80s, I designed an airborne repeater package using a GE Porta-Mobile II Low-Band Radio and a GE MPD Portable with a Sweet Electronics Logic Controller and put it in an Airplane so two vehicles (car on a VHF Highband Channel and a motorcycle on a Lowband VHF) can directly communicate over 15-20 miles apart in hilly terrain while in motion traveling across the State for a special event.  "Some People" not in the know couldn't figure how in the hell I was able to make a Lowband radio talk directly to a Highband radio.  My answer to them was "I used the "PFM" technology method.

I truly missed those days creating solutions like this to make the impossible possible.

[WSEL330]

59 minutes ago, WRYZ926 said:

We transmitted into dummy loads 

(thinking, Is he talking about me?) LMAO

[WSEL330]

"I used the PFM" love that sh&$!

[WSEL330]

Outta curiosity or gaps in my education, Duplexer or no. I'm guessing the RF's occupying the same antenna would still be a problem. If a duplexer is used, would it have to be purpose built or just tuned?

[WSEL330]

Outta curiosity or gaps in my education, Duplexer or no. I'm guessing the RF's occupying the same antenna would still be a problem. If a duplexer is used, would it have to be purpose built or just tuned?

[WSEL330]

3 minutes ago, WRYZ926 said:

 

We tested some dual band amateur mobile radios with cross band repeat that were MARS Modded 

You mean you heard from a friend how they did that. Be careful, you don't want to go to radio jail where they desense you and you have to constantly remind them that you do use your call sign....