[NLRS] FT-817 as IF radio

[Donn - WA2VOI/0]

Hi John
The PTT on the DATA jack is for PTT IN, and in from a TNC.  See pg 41.

The ACC jack, TX GND pin is pulled to GND during TX thru a transistor.  CAUTION, 
this is only good for maybe 5ma or so.  See Main Unit schematic, bottom center 
and trace the wiring.

ALC control is not required.  Set the FT-817 for 2.5 watts or 5 watts. See page 
28.

TAKE THE MANUAL WITH YOU... you'll need it.  There are X functions for every 
(^)% button and knpb on the panel and its impossible to keep straight (at least 
for me).

73 Donn
WA2VOI/0


----- Original Message ----- 
From: "John P. Toscano" <tosca005 at tc.umn.edu>
To: "NLRS" <NLRS at mailman.qth.net>; "Badger Contesters" 
<BadgerContesters at mailman.qth.net>; "Chippewa Valley VHF Group" 
<cvvhf at cvvhf.org>
Sent: Wednesday, July 08, 2009 3:35 AM
Subject: [NLRS] FT-817 as IF radio


>
>
> I just picked up a used FT-817 for use as an IF radio to some of my
> transverters. I am shocked at how vague the operating manual is with
> respect to the jacks on the back that I would use for interfacing to a
> transverter.
>
> There is a DATA jack that has PTT and Ground (and other signals).
>
> There is a ACC[essory] jack that has ALC, Tx Inhibit, Tx Gnd, Gnd (and
> other signals).
>
> What are folks using to key their transverters? Are either or both of
> the signals PTT and Tx Gnd bi-directional, i.e., do they go to ground
> when the radio's PTT is pressed, and cause the radio to go into transmit
> mode when grounded, like the PTT line on my IC-706's? Or is there one
> line that signals my intent to transmit (that could be an INPUT to the
> sequencer) and a different one that would actually cause the radio to
> begin transmitting (4th OUTPUT of a sequencer)? Or do I have to play
> tricks with the Tx inhibit to prevent the radio from transmitting until
> the 4th sequencer stage? And what voltages are appropriate for the ALC
> input? On my IC-706, greater NEGATIVE voltage reduces output power, and
> 0 volts causes no inhibition of transmitter power. Fortunately, with the
> much lower maximum power output of the FT-817, I may not need to use the
> ALC input at all...
>
> Any other advice on good or bad features of the FT-817 as an IF radio
> would be appreciated.
>
> Thanks in advance.
>
> W0JT
> ______________________________________________________________
> NLRS mailing list
> Home: http://mailman.qth.net/mailman/listinfo/nlrs
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:NLRS at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html