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Nice interface, Ian.? Curious, why use the external speaker jack, given that its output is dependent on the front panel volume control and subject to being mis-set?? There is a fixed level audio present on both the DIN and TRS connectors, which is what I use.? The level is perhaps a bit low, but Direwolf decodes it just fine.

Greg? KO6TH

Ian M wrote:

Hi?

Please find attached?the?Sound Card interface circuit diagram which I have used for the past 20 years. Works all mode all bands, and was originally designed? by the guys who wrote W95SSTV and Chromapix

It uses?the data port for SSB and the 1200 baud part of the packet? port for FM.

I hope this is of help in resolving your issue?

Regards

Ian G8ZHC

On Tue, 16 May 2023 at 20:37, Greg D <ko6th.greg@...> wrote:

What Spence said,

I would add that the 847 was built back when doing "data" communication on HF involved different "TNC" equipment than VHF, so (I presume) they designed it to segregate the various modes to different physical connectors on the back panel.? It is possible to wire things together with appropriate DC blocking caps and use a single sound card interface, but it's tricky.? Receive audio goes everywhere, but transmit only comes from whichever jack that triggered PTT.

Do note that using CAT to trigger PTT is a problem.? For reasons I cannot fathom, the rig listens to the front panel mike jack for transmit audio when PTT is triggered by CAT.?

Greg? KO6TH

Spence M0STO via wrote:

Yes and WSPR and JT65HF.

? Also recently used on GreenCube but a lot of hassle due to GreenCube being simplex and the FT847 having to work doppler shifting and split on the same band. Very tricky to Doppler shift split frequencies going up and down.

? Apart from that, very good results with SignaLink SL-1 and homebrew interface.

? However, some issues with SCU-17 data port on FT847 cannot communicate with HF due to no data output in HF via data socket.

? Hope this helps.

? De Spence M0STO?

Sent while portable! please excuse typos.

On 16 May 2023, at 19:41, Hal Dale <wb4aeg@...> wrote:

?

Has anyone used the 847 on FT4/8 or other digi modes on 2M and? 432?? Hal/WB4AEG