600 watt amp

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radioman
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600 watt amp

Post by radioman » Fri Sep 12, 2014 3:31 pm

600 watts!
4 x TP9386 in output!
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ir8 pir8
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Re: 600 watt amp

Post by ir8 pir8 » Fri Sep 12, 2014 4:38 pm

Is that a very high powered PMR repeater or pager transmitter? Looks like it's probably a pager TX built for around 135-160MHz or so...?

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FM King
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Re: 600 watt amp

Post by FM King » Sat Sep 13, 2014 10:50 am

Stick that up on Highgate Hill with a double stack gamma matched, London wouldn't know what's hit it!!!

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teckniqs
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Re: 600 watt amp

Post by teckniqs » Sat Sep 13, 2014 12:07 pm

That's an absolute beast and yeah I'd say it's probably one of those pager transmitters which go out around 153MHz and cover a very large area!

Keith used to like using those output transistors in pairs.

pjeva
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Re: 600 watt amp

Post by pjeva » Sat Sep 13, 2014 12:25 pm

Looks like pager transmitter. Output coax transformers could be replaced with longer ones and it will be good for fm. Usually they were used at half power so they last longer.

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teckniqs
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Re: 600 watt amp

Post by teckniqs » Sat Sep 13, 2014 3:28 pm

That makes sense, I also think I recall seeing most of them using twin bay folded dipoles to get the gain back up... :tup

pjeva
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Re: 600 watt amp

Post by pjeva » Sat Sep 13, 2014 8:44 pm

Usually, there is tune and operation mode in this transmitters/amps. If you put it in tune mode (and replace some caps and coax transformers) you can push them to full power. Otherwise, in operation mode, alarms and control board turns them off because of excessive power.

ir8 pir8
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Re: 600 watt amp

Post by ir8 pir8 » Sun Sep 14, 2014 11:19 pm

That makes sense, I wouldnt expect that to be running at full power

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