I suspect he is overlooking something. I use a very inexpensive interface with
my Omni six. Nothing fancy like that one.
When I was first setting it off I ran into some settings and connection issues
but really it was very easy.
EASY-DIGI interface is available on eBay for about $25 and works just as good
as any of the fancy ones.
Best regards - Bry Carling
> On Jul 10, 2014, at 8:45 AM, "Bob McGraw - K4TAX" <RMcGraw@Blomand.net> wrote:
>
> I'm trying to assist a friend setting up his Omni VI with a SignaLink USB.
> He does have the cable supplied from SignaLink and it seems to be connected
> to the radio correctly. It receives and decodes PSK-31 very satisfactorily
> and it keys the transmitter correctly.
>
> The difficulty is having both the SignaLink connected to the Audio IN on the
> rear and the microphone connected to the front at the same time. The
> SignaLink appears to key the radio correctly but does not produce output.
> When he then later and on a different frequency tries to transmit SSB only
> white noise is heard. If he unplugs the cable to/from the SignaLink the
> noise is not heard. This occurs when the SignaLink is off or on.
>
> It appears from the schematic the mike input on the front and the rear Audio
> In are each isolated by a 10K series resistor to a summing point at the mike
> amp input. Using a low impedance {500 ohm} dynamic mike and the SignaLink
> output being some 600 ohms, I calculate the isolation between the two inputs
> would be some 35 dB or so. Certainly this would seem to be very adequate
> isolation such that having the two connected, although the SignaLink is off,
> it would not interfere with the use of the mike. And with the SignaLink on
> it would produce audio and it would not be interfered with the connected
> mike.
>
> Anyone have any specific experience or thoughts on this configuration?
>
> 73
> Bob, K4TAX
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