[TenTec] PSK 31 Interface and the Jupiter

[Jerry Volpe]

Mykeyw9 at aol.com wrote:

>Anyone using a MFJ 1275T with a Jupiter?  Other interface?  Experience?
>
>Thanks.
>
>
>Mike W9UQB/7
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When I had my Jupiter I was using my own interface which was mostly an 
elaborate variation of the RASCAL kit. I also use the really nice KK7UG 
Interface Model II kit. Both have the basic isolation transformers on 
the audio in and out and opto-isolation on the PTT, CW/FSK lines. The 
Jupiter performed perfectly with both interfaces. I suppose some get 
away with running the audio straight from the accessory jack to the 
sound card in and out (not MIC in but Line IN) and use rhe Jupiter's VOX 
to change into transmit mode. I prefer isolating the ground returns on 
these paths to avoid ground loop, noise, hum and other potential 
situations. The accessory jack on the Jupiter has fixed output but the 
input is adjustable. You must remember to change the input from MIC 
connector to ACC jack via the menu.

My only suggestion is that you use good quality shielded cable for the 
audio lines and the PTT and that you keep them as short as practical. I 
also have quality ferite beads on these as they enter the computer and 
Jupiter. Overkill? Probably, but my Jupiter didn't like even a slight 
bit of stray RF.

73,

Jerry, KG6TT