[amsat-bb] Re: Configuring a pair of IC-706MKIIG's for satellites

Paul Stoetzer n8hm at arrl.net
Fri Apr 11 17:42:25 PDT 2014


That pin just supplies a constant voltage that varies by band, which
is used for amplifier automatic band switching. Unfortunately,
according to the following post, the voltage on that pin is the same
for VHF and UHF.



Paul, N8HM

On Fri, Apr 11, 2014 at 7:46 PM, Ronald G. Parsons <w5rkn at w5rkn.com> wrote:
> I am in the process of configuring a pair of Icom IC-706MKIIG transceivers for Full Duplex U/V and V/U satellite service. They will be controlled by SatPC32 with one being the transmitter and the other the receiver.
> This will require switching the duplexer-separated UHF and VHF input/output between the UHF and VHF antennas. I would like to control the coax switches automatically to avoid human error. I am looking for a signal, either from SatPC32 or the transceivers to switch the relays between U/V and V/U modes.
> The transceivers have a signal on the 13-pin DIN ACC socket pin # 5 labeled BAND with the description "Band voltage output. (Varies with amateur band)  0 - 8.0 V" No other details.
> Does anyone have any additional information on this signal?
> Is there another signal available from SatPC32 or the transceivers that would enable automatic switching between U/V and V/U?
> Ron W5RKN
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