On 2 Sep 2006 10:25:20 -0700, "Don" wrote:

This is an old question, but I see no answers yet.

Anyone figured out how to get an Icom 706 to work with an Alinco EDX-2
tuner?

I've made the corrections and the turner tunes but creates a 1:3 SWR
into the Icom and of corse the rig won't work like that.

Did you initiate a tune? Unlike some other tuners, the EDX-2 will not
initiate the tune automatically, you need to initiate it and
presumably you have interfaced the EDX-2 to the Icom's tuner
interface.

If you have done all that, the relays rattled, and you have 3:1 VSWR,
then it sounds like the EDX-2 is faulty.

Owen


I've also noticed that there is a "daughter board" inside the EDX-2 and
wonder if the manufacturer has another daughter board that will permit
(convert) the EDX-2 to an AH-3?

I have not seen such a thing, I doubt it.


I don't have an AH-3 to look at, but does it also have a daughter
board? Schematic??


IIRC:

I have used an EDX-2 on an IC706IIG.

The protocol is very similar, the EDX-2 is the dumber device, so it
ought be just a matter of pinout adjustment.

The EDX-2 does not accept "abort" commands, and it doesn't send a
"fail" response, so the integration is not quite 100%. But it will
respond to the Icom's START signal, and assert the KEY line until it
has tuned... which will work OK with the Icom.

Beware that the different Icom models use this interface in different
ways, and the IC7000 continues that tradition. It seems that it is
very important that the connection to the tx KEY line is open
collector, otherwise the tuner interferes with proper fan operation.

Owen
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