>If you are home brewing your own digital interface, it is probably worth
>paying careful attention to any isolation transformer that you use. In
>many cases, you are better off with >no transformer at all between the rig
>and the sound card, and instead, carefully bonding the ground of the sound
>card to the ground of the rig (see that first photo in the web >page above,
>where I had used the balanced input of the E-MU sound card, and grounding
>the E-MU to the rig with a short piece of wire). An inexpensive
>transformer is almost >bound to have a worse IMD than the IMD from your
>sound card -- sometimes it is better to remove ground loops by starting
>with no ground induced noise in the first place :-).
>In short, the sound card is very often not the weakest link in your audio
>chain. Fix everything else first, and then, come back to the sound card.
>73 (back to counting decibels :-)
>Chen, W7AY
Now that is an interesting statement I never would have thought!
What about using a couple of large capacitors (100 to 1000 uF) in series
with the audio between the rig and the sound card?
Thanks Chen
73
Jim W7RY
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