With help of this post: http://www.m3forum.net/m3forum/showthread.php?t=239069 I have upgraded my C33 business radio to Bluetooth. I don't like the look of a modern head unit in my Z with all these blinking leds they have these days. What I like of my C33 is that the sound is going louder the faster you drive (you can program this feature: http://www.eabjr.com/Business-Radio-C33-and-CD43.php
You need:
A solder iron
3.5mm stereo plug and cable http://goo.gl/2pAxpa
USB cigarette charger http://goo.gl/gqAbir
USB bluetooth dongle http://goo.gl/ns87yp
MiniDC ground loop isolator https://www.minidsp.com/products/accessories/minidc-isolator
My radio is Japanese, not that it mathers, because I never listen to the radio anyway.
The cassette part is only mounted with 3 screws. If you remove these, you can lift the cassette part out of a plug.
You need to solder the 3.5mm jack and cable to the left top side. This is after the pre-amp part of the cassette head.
Detail of the solder work
Don't forget to remove the spring
Everything put back together
Connect to your Bluetooth and modified USB cigarette charger. I have soldered wires into the USB cigarette charger, so I can put it behind the radio to the acc.wire. The bluetooth I have hot glued so it won't fall out
Then everything worked, but I had a terrible ground loop noise (motor noise). For some reason the radio didn't like this setup. So I did some searching on the net and found a ground loop isolator: https://www.minidsp.com/products/accessories/minidc-isolator The isolator was only US$12, but post was US$20 :-(. But I had it within 4 days
The MiniDC isolator did the trick. I have now a OEM look Bluetooth C33 business radio.
The remote output I have connected to my amplifier, it saves me the oomb sound when I turn the key.
You need:
A solder iron
3.5mm stereo plug and cable http://goo.gl/2pAxpa
USB cigarette charger http://goo.gl/gqAbir
USB bluetooth dongle http://goo.gl/ns87yp
MiniDC ground loop isolator https://www.minidsp.com/products/accessories/minidc-isolator
My radio is Japanese, not that it mathers, because I never listen to the radio anyway.
The cassette part is only mounted with 3 screws. If you remove these, you can lift the cassette part out of a plug.
You need to solder the 3.5mm jack and cable to the left top side. This is after the pre-amp part of the cassette head.
Detail of the solder work
Don't forget to remove the spring
Everything put back together
Connect to your Bluetooth and modified USB cigarette charger. I have soldered wires into the USB cigarette charger, so I can put it behind the radio to the acc.wire. The bluetooth I have hot glued so it won't fall out
Then everything worked, but I had a terrible ground loop noise (motor noise). For some reason the radio didn't like this setup. So I did some searching on the net and found a ground loop isolator: https://www.minidsp.com/products/accessories/minidc-isolator The isolator was only US$12, but post was US$20 :-(. But I had it within 4 days
The MiniDC isolator did the trick. I have now a OEM look Bluetooth C33 business radio.
The remote output I have connected to my amplifier, it saves me the oomb sound when I turn the key.
