Sebastian, The bias T is for powering up the preamp if you didn't have the radio that supplied power. I have these preamps and work well with my IC-910 when I use them. Good Luck, Dee, NB2F
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Sebastian, W4AS Sent: Tuesday, August 09, 2011 12:31 PM To: AMSAT-BB Subject: [amsat-bb] Mirage preamps
Before I destroy these, is anyone using Mirage KP-2 mast mounted preamps with a Yaesu FT-847?
I picked up a couple of them recently, and they came with the control box (which appears to be a bias tee) that supplies 12 volts via the coax line, in order to power them.
The FT-847 can already supply 12 volts up the coax to mast mounted preamps; but I wonder if these Mirage preamps require the use of the control box for some reason. I would prefer to use the rig to power the preamps, but the manual doesn't mention that option.
73 de Sebastian, W4AS
_______________________________________________ Sent via [email protected]. 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