Motorola Quantar Tuning / Programming Service

[Cowley639]

Hey everyone,

I have a Motorola Quantar in UHF, its the silver model. I am looking to have the receiver re-tuned and aligned, and have the unit re-programmed to a new repeater pair. It is currently programmed to 464.5500/469.5500 at 100W output. I am needing it re-tuned to 464.2125/469.2125, and the CWID changed to a new callsign.

Anyone on here offer that service? I'm located in Kansas, and would be willing to ship it wherever needed. I do have a call into a few local radio shops to see if they can program it as well.

Any help is greatly appreciated!

 

[wgbecks]

Crowley639,

The change in frequencies is so small that the station should not require any retuning or realignment provided is has been meeting specifications
unless the station is operating as a repeater and will requires that the duplexer be retuned in addition to changing the codeplug to the new pair.

I am a retired technician with loads of Motorola experience and have the requisite test equipment and programming tools, but it will likely cost you more to have it shipped out for this service than it would to take it to a nearby Motorola shop.

Feel free to PM me if you'd like to discuss further.

Bill

 

[Cowley639]

Thanks for reaching out...

The unit is set up as a repeater, however the seller I am selling it to already has a tuned duplexer for their frequency pair. The unit currently "hears" just fine on 469.5500, and it would be moving down to 469.2125 on the receive side. So if you don't think that would cause too much of an issue, then great. I can just re-program it myself.

Like I said I have calls into my nearest Moto shop to see what they can do for me. But it sounds like I may not need them after all if I can just program myself.

 

[wgbecks]

All that should be needed is to change the frequencies and possibly PL/DPL along with the CWID and you should be golden.

 

[Echo4Thirty]

I would not touch the preselectors on the RX at all unless you have the proper test equipment, that said its not a bad idea to realign the station if its going on the bench. Some of these things have not been touched in decades. We do it on subscribers when we get the chance, and certainly on site equipment.

 

[MTS2000des]

Just a thought but the duplexer tuning should be checked on site once you have the station in hand, programmed and connected to your feedline and antenna. All of that can affect tuning and ASSuming the duplexer is being shipped, it is VERY LIKELY it can become detuned due to the shipping morons tossing it around. Even if it is well packed, physical shock can and will affect tuning. Since this is a commercial setup, it is REALLY imperative that a local shop come to your site and do a proper tune up/setup. Yes, it costs money. A lazy man works twice as hard!

 

[Cowley639]

I'm very aware of the issues with shipping duplexers, I'm selling this repeater to an entity that already has a duplexer at their site (DB4076 BP/BR duplexer), they are just upgrading their low power repeater to a higher power output that the Quantar provides them.

Just a thought but the duplexer tuning should be checked on site once you have the station in hand, programmed and connected to your feedline and antenna. All of that can affect tuning and ASSuming the duplexer is being shipped, it is VERY LIKELY it can become detuned due to the shipping morons tossing it around. Even if it is well packed, physical shock can and will affect tuning. Since this is a commercial setup, it is REALLY imperative that a local shop come to your site and do a proper tune up/setup. Yes, it costs money. A lazy man works twice as hard!

 

[Cowley639]

I didn't want to touch the preselector, which is why I asked if anyone could do it for me considering I don't have the proper equipment.

I'm going to read the unit, make the necessary changes and then let the buyer of my unit have their Moto dealer take care of the rest. I should be able to reprogram it to their repeater pair, and add their CWID, that should get them on the air right away and then the rest is up to them.

I would not touch the preselectors on the RX at all unless you have the proper test equipment, that said its not a bad idea to realign the station if its going on the bench. Some of these things have not been touched in decades. We do it on subscribers when we get the chance, and certainly on site equipment.

 

[MTS2000des]

I'm very aware of the issues with shipping duplexers, I'm selling this repeater to an entity that already has a duplexer at their site (DB4076 BP/BR duplexer), they are just upgrading their low power repeater to a higher power output that the Quantar provides them.

The station becomes part of the system, so if they are replacing a radio, then the proper route is to PM the system and do sensitivity tests using an ISO-T with the station in line with the cans, verify proper output/insertion/loss etc. Again, I believe (and practice) in doing it the RIGHT WAY, especially in commercial (part 90) spectrum. It saves one quite a bit in the long run.
The cans are capable of handling the power, but tuning can be different once you throw a different radio inline. I am sure the local "Motorola shop" will explain this as well.