[amsat-bb] Re: TS-790E &9600Bd@1.2Ghz

Mark L. Hammond marklhammond at gmail.com
Fri Jan 22 08:35:15 PST 2010


I'm fairly certain (but not 100% sure) the transmit modification you
made works for ANY band selected at the MAIN (transmit) band :)
Just put 1.2GHz in the MAIN band, and 70 cm in the SUB band, and you
should be ready to go (I think).

The transmitter modification is at or near the varactor, so it should
provide transmit audio to any selected band.  So, I think your radio
is ready to go with AO-51!

Be sure to try to optimize the uplink frequency.  Many of us find that
1268.703 works well.  At these frequencies, you might find that
something higher or lower works best.

When I modified my TS-790A for 9600 baud packet I tapped the both the
MAIN and SUB band receiver ICs and put a small switch on the back of
the radio.  That allows me to work simplex or duplex, regardless of


Mark N8MH

On Fri, Jan 22, 2010 at 10:21 AM, Vincenzo Mone <vimone at alice.it> wrote:
> Hit o the list,
> I own an Kenwood TS-790E that I used since there was KO-23 KO-25 UO-22 and
> others 9600bd Satellites.
> Ho you know with these birds with had to work as Uplink 2m and as downlink
> On 70 cm so I have made modifies to these two bands using the ACC4 socket on
> The back of the radio..
> Now there is AO-51 that has the possibility to go at 9600bd, but sometimes
> it has the uplink on 1.2GHZ.
> Is there anybody that can tell me if I can add the 9600bd on the 1.2Ghz
> module?
> I need that it has to work in full duplex as the other one.
> Thanks in advance for any help
> 73 de Enzo IK8OZV
> EasyLog 5 BetaTester
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Mark L. Hammond [N8MH]

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