Hi, Lee
Interesting post - thanks for the info.
I mount the little Radio Shack isolation transformers in old 35 mm plastic
film cannisters. I put a mini-jack in each end and wire the transformer to
them and just drop the transformer into the can. Works fine and allows the
usual 1/8" mono connectors to be used for both input and output. And they
can be inserted and removed as needed.
72/73/oo, George W5YR - the Yellow Rose of Texas
Fairview, TX 30 mi NE of Dallas in Collin county EM13qe
Amateur Radio W5YR, in the 56th year and it just keeps getting better!
QRP-L 1373 NETXQRP 6 SOC 262 COG 8 FPQRP 404 TEN-X 11771
Icom IC-756PRO #02121 Kachina #91900556 IC-765 #02437
All outgoing email virus-checked by Norton Anti-Virus 2002
WA3FIY wrote:
> That said, I use a 600 ohm to 600 ohm 400 mw isolation transformer
> for most audio connections here and have done so for most of the
> last 30 some years. The transformers are small, inexpensive and
> break any potential ground loops that may sneak in. I mount them on
> a piece of perf board only slightly larger than the outline of the
> transformer itself. That provides convenient and secure mounting of
> the cable. I then cut my interconnecting cable somewhere near the
> middle [not critical] and wire the transformer in place. Finally, I
> cover the whole assembly with a piece of shrink tubing to insulate the
> connections and protect the transformer. I call it a "bump in the
> line" arrangement. You now have a transformer isolated connecting
> cable.
|