Does the interface has an optocoupler for the PTT-Line. Then it will
not work for FT-1000MP and may be for the FT-990 also.
I made some experiments with my FT-1000MP with the result that the
voltage over the closed PTT-switch must be lower than 0.5 Volt, so that
the tcvr goes to transmit. And normal optocouplers has a voltage of 0.7
Volt and more.
73 + 55
Wolf, DL6JZ
J. Allen schrieb:
> More on the troubleshooting....
>
> The interface that worked with the Omni-V does not work
> with the FT-990. It
> does not completely operate or nor completely release the
> PTT, and I imagine
> that the same thing will be true of the RTTY KEY line.
>
> I now need to find the diagram for an interface that
> someone HAS HAD SUCCESS
> with using an FT-990 for FSK.
>
> Any help out there?
>
> J
> VY1JA
>
>
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