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I found this post on another site from a guy named Fred. It should be helpful for those that want to make there own cables or connect a ham radio. I haven't verified them but the guy seems to know what he is talking about.


http://burgmanusa.com/forums/viewto...start=25&sid=30f5671da3517e772a7664ec2826fb10
BAEHR ULTMA XL Pinouts
==========================
Disclaimer: information believed to be accurate but
not guaranteed.

Pinouts from the short intercom cables
All viewed from PIN side
Counter clockwise right to left **
Pin 1 on right through pin 5 on left
Center pin = 6


STEREO MUSIC CONNECTOR Male:
=========================
2 & 6 = Left Audio both pins floating
3 & 4 = Right Audio both pins floating
1 and shell = ground

UNIVERSAL CONNECTORS Male:
=========================
2 & 6 = Left Audio both pins floating
3 & 4 = Right Audio both pins floating
5 = Amplified Microphone from Headset
1 and shell = ground

HELMET CONNECTOR Male:
=========================
Viewed from pin side
Counter clockwise right to left
Pin 1 on right through pin 5 on left
1 = Left Speaker (grn color code )
2 = Right Speaker ( Yel Color Code )
3 = Common to left + right ( black )
4 & 5 = Microphone
Same wiring as for Honda Goldwing
and J&M Headsets

Universal Connector Cabling Options
==================================
Mono to both speakers:
Audio Ground to pins 1 & 4 & 6
Audio Sound to pins 2 & 3

3 Wire Stereo:
Audio Ground to 1 & 4 & 6
Left Audio Pin 2
Right Audio Pin 3

FRS RADIO WIRING NOTES:
===================================
PTT switch is wired in series with the Microphone
wire which ends up in universal connector pin 5

HEAT REDUCTION IDEAS
====================================
In hot climates, the intercom may run excessively hot
and might possibly result in reduced reliability.
Solution:
1- aluminum bar stock 2 inches by 8 inches
1- Chip cooler fan for Pentium PC
Grease the bar stock as required to help dissipate the heat
Attach the bar stock & chip cooler to the back side of the
intercom with 14 inch tie wraps. Silicone Grease is
recommended for best heat dissipation, available at Radio
Shack.


NOISE REDUCTION IDEAS
===================================
In certain unusual circumstances, ground loops, and alternator
noise can be amplified in the intercom. Isolation transformers
eliminate ground loops and additional power supply filtering
eliminates alternator whine and potential feedback squeals.

TEST: Connect the intercom to a separate 12 volt battery
to see if the noises go away.

Audio Isolation Transformers
Radio Shack #273-1374
with 600 ohm primary, 600 ohm Secondary
Primary to the audio accessory & secondary
to the Baehr Intercom.

DIN Audio Connectors
http://www.action-electronics.com/ppdin.htm#Minicable
Shielded 6 wire cable
http://www.action-electronics.com/cabl-prc.htm#Shielded
Audio Isolation Transformers ( 600 ohm primary to 600 ohm secondary is recommended )
http://www.action-electronics.com/audxfrmr.htm
Panel Switches
http://www.action-electronics.com/switches.htm#Guard
Relays, 12 volt 4PDT
http://www.action-electronics.com/nterelay.htm
http://www.nteinc.com/relay_web/R12.html

Power Supply isolation and filtration
Radio Shack 12 Volt Noise Filters work well to eliminate
feedback and alternator noise. Also available at most
auto parts stores.

In extreme cases, an isolation power supply can be used to
eliminate alternator noises, available from:
http://www.davidnavone.com/filters.html

** Same pin assignments as the Female cable connectors
as viewed from the wiring side


Mark
 
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