homepage Motorcycle Headset

Multi-purpose Motorcycle Headset

I have a setup that can be used for connecting my Chatterbox CB50FFHS Headset to my (only 1 at a time): Total cost was about $50. Total time was "a lot", but I had to figure everything out (no diagrams online).

Parts

CB50FFHS Headset $25.15 Road Rider (after 10% weekend sale discount)
6 pin DIN female $1.69 Radio Shack
Nokia adapter $7.99 Radio Shack
3.5mm stereo/mono adapter $1.99 Radio Shack
3.5mm stereo male $0.99 Radio Shack (estimated - I had one)
2.5mm stereo male (2) $1.99 Frys
2.5mm stereo female (2) $1.79 Frys
2-conductor wire (50ft) $2.49 Frys
Momentary switch $0.50 Halted
Velco (more than needed) $2.49 Michaels

Tools

Diagram 


                         6 pin DIN
ChatterBox               Female (A)
CB50FFHS    ----[[[[[    ]]]]]-----------4 conductor---------...
6 pin DIN                      
male                           
                                            

              3.5mm stereo  stereo     
              male (B)      to mono (D)
..._________-[[[===         ]]]===
           |
           |
           |                2.5mm stereo   2.5mm stereo 
           |                female (E)     male (F)
           |-[[===          ]]----2 cond---[[===
              2.5mm stereo      \__2 conductor_______[}
              male (C)                               Momentary 
                                                     switch (G)

                            Nokia Headset adapter (H)
                            2.5mm stereo to Nokia 6100/5100 phone
                            ]]|||||

Pinouts

CB50FFHS (A) 

  6-pin DIN (looking at female connector)

 1 .  |  . 6
 2 .     . 5
     . .
     3 4

1 - left speaker
2 - right speaker
3 - speaker common
4 - N/C
5 - mic common
6 - mic +4V
If you test the resistance of the female DIN on the headset, you should see the following:

The easiest way to do this is by plugging in an unwired male connector and test the solder leads.

I connected 3 and 5 together in the female DIN plug. This is needed for the cell phone connection and happens anyway for the FRS. That leaves 4 wires leaving the DIN. At the other end of the cable, I have a 3.5mm stereo plug and a 2.5mm stereo plug.

Stereo audio found in CD players (B) 

  3.5mm stereo male 
shield - common
ring   - right channel
tip    - left channel

Cobra FRS speaker output (D) 

  3.5mm mono male
shield - common
tip    - signal

Cobra FRS mic input (F)

  2.5mm stereo male
shield - common
ring   - Not sure (didn't need it; don't use a mono plug though; that would
  short this to the shield)
tip    - mic signal (connected to PTT button signal B)
You should see a 3 to 4V potential from shield to tip out of the jack.

Standard cellphone headset (C)

  2.5mm stereo male
shield - common
ring   - speaker signal (I connected this to the right channel)
tip    - mic signal

PTT assembly input (E)

  2.5mm stereo female
shield - common
ring   - N/C (don't use a mono plug though; that would short the speaker)
tip    - mic signal (connected to PTT button signal A)

SPST Momentary switch button (G)

A - from female
B - to male

I got a nice and small momentary switch for the PTT. It's for a keyboard. It had 4 leads (2 signals). I cut a small square of an old credit card (10mm on a side). I used a pin and hammer to poke 4 small holes through the card to mount the switch. After connecting the wires to the switch, I glued the card to a strip of velcro.

The idea is to wrap the velcro strip around a finger. It can be mounted on the base of my left index finger, and use my thumb to press it.

Usage

When using the cell phone: When using a stereo (CD/MP3): When using my FRS:
Mail: Benjamin