gm300 maxtrac power amp stand alone usa

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shadowman
Posts: 93
Joined: Thu Mar 27, 2008 1:36 am

gm300 maxtrac power amp stand alone usa

Post by shadowman »

hi all i have a project going on here and im trying to work out how to run a pa from a gm300 as a stand alone tx boost amp for a low rf power device that needs some more grunt... can anyone tell me how many milliwatts the pa will need to drive and what else i will need to do to run it such as bias voltage and what pin for the bias? many thanks all ! cheers
shadowman
Posts: 93
Joined: Thu Mar 27, 2008 1:36 am

Re: gm300 maxtrac power amp stand alone usa

Post by shadowman »

anyone??? i know this has been done before ...
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kb4mdz
Posts: 282
Joined: Tue Oct 02, 2001 4:00 pm
What radios do you own?: Too many for the time I have.

Re: gm300 maxtrac power amp stand alone usa

Post by kb4mdz »

Just off the top of my head, I think the maxtrac/radius/gm300 line put out about +20dBm to the PA; as far as power control, might be able to do a simple voltage divider to provide the control voltage, or if that doesn't work, an op-amp buffer, maybe with a pot to set the output to whatever level you want.

Looks like a time to read the manual, anyway.
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