[VHFcontesting] Use of negative voltage to reduce power with FT-847

[Nate Duehr]

Dave,

Haven't used it on mine, but your numbers don't match this guy's, 
right?  You cant get the ALC to activate at all?
http://www.supercontrol.de/cat/ft847faq/page2.htm#alccontrol

Something might be wrong...

Also I *seem* to recall somewhere in the dusty corners of my mind that 
there's a menu setting that swaps the ALC pin from being an ALC to 
something else... seems like it was a toggle...

There seems to be more "chatter" out there about ALC modifications to 
the FT-847 since I last looked on Google.  Stuff like this:
http://www.70mhz.org/847mods2.htm

Did you buy yours used, or have you had it since new?  Someone may have 
dorked with it.

Nate WY0X

On 2/1/2010 5:21 PM, David Pruett wrote:
> All:
>
> Has anybody tried using the trick of applying a negative voltage to a
> FT-847's ALC input to reduce power to drive a transverter?  This
> technique worked really well with my IC-756 with only -1.5V applied, but
> applying even -4.0 volts to my FT-847 didn't seem to make any difference
> at all.
>
> I'm trying to use a Downeast Microwave "Transverter Interface Box" (TIB)
> to provide the negative voltage to cut back the 144 MHz power to my 903
> MHz transverter when I enable the transverter.
>
> TIA for any advice or observations.
>
> 73, Dave/K8CC
>