[aprssig] FTM-350 cables
hessu at hes.iki.fi
Thu Mar 10 04:59:41 CST 2011
On Wed, 9 Mar 2011, Stephen H. Smith wrote:
> How about a 6-pin mini-DIN to three or four 3.5mm stereo miniplugs?
How about a complete, isolated, compact sound card interface packaged as a
USB-to-mini-DIN cable without a separate box (components inside a
connector or a thicker plastic part in the middle of the cable)?
Single USB plug in the other end, a two-port USB hub chip, an USB audio
chip and a USB serial chip, opto isolator for PTT and transformers for the
audio, and the 6-pin mini-DIN in the other end.
The components should be quite well available, and the boxed alternatives
(microham and some others) to this seem a bit overpriced at the moment.
And the box seems unnecessary. I don't know if SMD line transformers are
I might be happy with a kit form, too, with the required components and a
small board to solder them on. Could package it in the middle of a cable
with heat-shrinking tube. USB A and mini-DIN pigtail cables included, and
attached to the board with cable ties.
> (I've been assembling this by splicing min-DIN patch cables to 3.5mm plugs
> myself for numerous sound card assemblies.)
Sounds like a good idea. Just a couple nights ago I soldered a
mini-din-to-D9 cable for my OT2, and it was a nightmare. The mini-din's
pin spacing is small, and it's easy to melt the connector a bit so that
the pins start moving. And then the connector's plastic case seems too
thick to fit through the hole in the Yaesu rig's case (FT-7800, FT-857).
Low quality connector, perhaps, but my component shop only carries one
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