Hi James.
That is a lot of gain. 10mW to 75W is around 38dB. If I had this as a problem, I would consider putting two amplifiers together.
For example http://www.mirageamp.com/pdffiles/D-1010-N.pdf
But include a small amplifier 'brick' to get the drive up from 10mW. Perhaps the M57721M from RF parts in California. 10mW in and 7 Watts out.
Of course with just 10mW input, your amp will not automatically switch from RX to TX. - Best to switch manually and not with RF anyway.
Second choice would be to make an amp from scratch. - A quick look at RF parts again shows 50mW to 60 Watts is available in a single device. - RA07H4047M. cost is $23 but then a box and some relays and a LPF will be much more than that.
Thanks
David G0MRF
-----Original Message----- From: James Cutler jwcutler@gmail.com To: amsat-bb amsat-bb@amsat.org Sent: Wed, 21 Sep 2011 17:32 Subject: [amsat-bb] Amplifier Suggestions?
Hello,
We are looking for a UHF amplifier (430-440MHz) for a transceiver to go from 10 mW to ~ 75W. Most of the amps were are funding require a much stronger input power than we can do. Note, it's a transceiver, so we want to be able to receive through the system as well. This is for half duplex satellite communication using a USRP radio.
Do you have any suggested amps?
Thanks,
--James, KF6RFX _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb