Gmrs repeater tuning.

[The_Hawk_Master]

I am looking at a Motorola gr1225 45 watt repeater it comes with a celwave duplexer with it. The duplexer is already tuned to 462.300/467.300. I know that’s not gmrs but do I need to get it retuned or is it close enough for 462.550/467.550? Also how good is a celwave duplexer? If I do need it retuned where is the best place to get it done for a decent price. Is there anyone local?

 

[Project25_MASTR]

Any radio shop with a tracking generator can tune. It will be an hour's worth of labor if there is no established flat rate. That being said, those duplexers are okay but they do begin desensing around 30W of power. Also, the GR1225 will require a 32 bit version of Windows to program...can't be done with 64 bit versions of Windows 7, Windows 10 or Windows 11.

 

[prcguy]

A flatpack duplexer will cover about 150KHz when tuned so 462.3MHz is not close enough.

 

[The_Hawk_Master]

Any radio shop with a tracking generator can tune. It will be an hour's worth of labor if there is no established flat rate. That being said, those duplexers are okay but they do begin desensing around 30W of power. Also, the GR1225 will require a 32 bit version of Windows to program...can't be done with 64 bit versions of Windows 7, Windows 10 or Windows 11.

If I had a laptop with a 32 bit version of windows 10 on it would it work? I will see if I can find a windows 10 32 bit software to download on a laptop.

I do have a true dos laptop but I don’t think there is a rss software For this repeater that will work with it.

 

[Project25_MASTR]

If I had a laptop with a 32 bit version of windows 10 on it would it work? I will see if I can find a windows 10 32 bit software to download on a laptop.

I do have a true dos laptop but I don’t think there is a rss software For this repeater that will work with it.

I should rephrase and be more specific. 15 years ago, versions 1.0-3.X was readily available online. That particular version was specifically written to run on DOS based Windows (i.e. Windows 3.11, Windows 9.X), etc. Version 4.0 was specifically written for 32 bit NT based Windows (XP, Vista, 7, 10). So yes, if you have Version 4 and Windows 10 32 bit, it will function. My legacy programming laptop (which is a field laptop still and not just a lab laptop thus running Windows still under security support) runs 32 bit Windows LTSC 2019 which is the last version of Windows to support 32 bit architecture.

 

[The_Hawk_Master]

I should rephrase and be more specific. 15 years ago, versions 1.0-3.X was readily available online. That particular version was specifically written to run on DOS based Windows (i.e. Windows 3.11, Windows 9.X), etc. Version 4.0 was specifically written for 32 bit NT based Windows (XP, Vista, 7, 10). So yes, if you have Version 4 and Windows 10 32 bit, it will function. My legacy programming laptop (which is a field laptop still and not just a lab laptop thus running Windows still under security support) runs 32 bit Windows LTSC 2019 which is the last version of Windows to support 32 bit architecture.

I have a dos computer. Is there a benefit to running 4.0 vs 3.x? Is there anything I would lose if I downgraded the version to 3.x to work with the computer I have available

 

[Project25_MASTR]

I have a dos computer. Is there a benefit to running 4.0 vs 3.x? Is there anything I would lose if I downgraded the version to 3.x to work with the computer I have available

If it's been programmed by 4 you may not be able to use anything older than 4.