Baofeng UV3R for hidden transmitter

[K9RFZ]

Now that the Baofeng UV3R is FCC type accepted, has anyone figured out how to make or sell
an interface cable for these cheap radios so it can be paired with the Byonics
controller and used as a fox?
Joseph, K9RFZ

[KB9TMP]

All those China made handhelds seem to have either a Kenwood type speakermike wiring or the Yaesu type wiring. So if it's two pin think Kenwood and single pin think Yaesu.

[WS4E]

I read they have some sort of squelch issue that makes them impossible to connect to TNC's.  They are actually single-chip software defined radios in design and something about the design apparently will make it not possible to use them for packet.  You might run into the same trouble interfacing them as well.

[K9RFZ]

A little experimentation with the spkr/earphone supplied with the radio shows that the single 4 conductor 1/8" pin looks like the Yaesu, but doesn't have the same pinout. I believe numbering from the tip

1 = RX
2 = TX
3 = TX tied to conductor 2
4 = GND

I've emailed Byonics (mfg for the PIC CON controller) and asked if they are willing to make an interface cable.
This package could make a very versatile hidden transmitter.

Joseph, K9RFZ

[N6BG]

I don't have the cable for sale yet, but I made one for my Baofeng.  I wired it like this:

tip - DB-9 pin 5 - ear audio
ring 1 - DB-9 pin 1 - mic audio
ring 2 - DB-9 pin 3 - ptt out
shield - DB-9 pin 6 - ground

I recommend using a shield cable, preferably the ear mic cable that came with it.
Note the HT PTT jumper J2 is NOT needed, since the cable has a separate PTT wire.

I hope to get these cables made to sell in the future.

Byon, N6BG
(Note, I don't frequent this forum, so if you want to contact me, please use the Byonics site.)

[K9RFZ]

Byon,

Thanks for your post and the instructions for making a cable that works with the PIC CON. The low cost Baofeng radio with your PIC CON will make a very affordable and versatile fox.
73,
Joseph, K9RFZ