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