[amsat-bb] Re: SSB Preamp

[Alan P. Biddle]

Also, most TX amplifiers have a series capacitor on the input, which will
also block the DC power.  With the TX amp switched off/out, there is usually
a DC path, but check the schematic.

Alan
WA4SCA



Not sure what you mean by "recognized a preamp" (I don't have a 910), but if
you have a lightning arrestor in between the rig and the preamp, they
usually block DC from passing.  Mine does, so I had to power it with an
external cable (which, now that I think of it, kind of defeats the purpose
of the lightning arrestor...!).

Greg  KO6TH


----------------------------------------
> Date: Mon, 11 Aug 2008 16:39:56 -0400
> From: roi at optonline.net
> To: AMSAT-BB at amsat.org
> Subject: [amsat-bb]  SSB Preamp
> 
> Hi,
> 
> Is anyone using a SSB SP-7000 preamp and an Icom 910H powered via direct
> feed from the coax.  I am not able to turn the preamp on with this method,
I
> set the menu for the preamp and the front panel; it recognizes a preamp
but
> it's not working, any ideas?
> 
> 73 Peter
> WB2OQQ
> 
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