Pre amps

[N4RQ]

Will the icoms mast pre amps work with the Yeasu ft-847 I know it can provide 12v via coax, does the icom need 8v
Tks Terry N4RQ

[W9GB]

Will the Icom AG-series of oputdoor (mast-mounted) pre-amps work with the Yeasu FT-847 transceiver?
http://www.universal-radio.com/catal.../icpreamp.html

I know the FT-847 can provide 12 V via the coaxial cable, but does the Icom pre-amp require 8 Volts?

Terry -

The Icom AG-series of pre-amps has the 8 volt regulator INSIDE the Icom outdoor VHF or UHF pre-ampliifer

Those Icom manuals and schematics (for AG-25 and AG-35 pre-amp) are on MODS.DK
The files are not exactly labeled properly, but I assure you the information is there!!
http://www.mods.dk/manual.php?brand=icom

My concern with outdoor (mast mounted) pre-amps for VHF/UHF has been proper sequencing/timing to avoid
transmitting into the pre-amps.

During my tests with an Icom VHF pre-amp (AG-25 currently on mast) with my Yaesu, it appears to work properly.

eham.net Reviews of the Icom AG-25
http://www.eham.net/reviews/detail/6116

BTW, the transistor used in the Icom AG-35 pre-amps : 3SK121