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GTX Power Adjust Mod

This forum is for the discussions targeted at converting various models of Motorola equipment to operate in the 900MHz Amateur Band.

Moderator: Queue Moderator

w1ksz
Posts: 96
Joined: Tue Sep 04, 2001 4:00 pm

GTX Power Adjust Mod

Postby w1ksz » Wed Feb 18, 2009 4:06 pm

I want to use a GTX as a link radio. Since the Xmt freq is outside the radio range (927.xxx) the
softpot does not work.
Is there a mod to lower the power level to the 5 watt region ?

Tnx, Dick, W1KSZ

rocketman
Batboard $upporter
Posts: 48
Joined: Fri May 23, 2003 10:03 am

Re: GTX Power Adjust Mod

Postby rocketman » Thu Feb 19, 2009 8:23 am

http://www.repeater-builder.com/motorol ... rctrl.html

A search on the web would have found this document

Rocketman

w1ksz
Posts: 96
Joined: Tue Sep 04, 2001 4:00 pm

Re: GTX Power Adjust Mod

Postby w1ksz » Thu Feb 19, 2009 8:42 am

I found that document, I was looking for something less intrusive.
I did get a response from a friend though that did solve my problem,
so my need is satisfied.

73, Dick, W1KSZ

User avatar
d119
Posts: 3436
Joined: Tue Mar 19, 2002 4:00 pm

Re: GTX Power Adjust Mod

Postby d119 » Sat Feb 21, 2009 1:41 am

Dick,

Please share the information you found?

Thanks!

User avatar
jackhackett
Posts: 1402
Joined: Tue Jun 10, 2003 8:52 am

Re: GTX Power Adjust Mod

Postby jackhackett » Sat Feb 21, 2009 11:43 am

A quick word on that r-b site mod... they could have done it by just removing the two chip resistors and using a 22k from the pot to pin 9 of the IC instead of hacking up the board like that... would be cleaner looking and completely reversible.


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