Samo,

I do not know about Alpine but mine was sony and remote
Operation was resistor based like 1,2k is volume up
2,2k was down and so on and they ware using (shielded) 3 wires
cable because of analog signal noise. Use 1meg pot with 1k series
resistor
slowly turn it if it didn't do any thing then it is code base
control system if it did some thing then you can figure it out
by turning the pod back and forward.

Andre Abelian


-----Original Message-----

Hi!

I recently bought a car that has originaly installed Philips car radio .
This radio has a remote control on a steering wheell. I didn't open it
yet,
but I believe that it isn't IR type and that it only has a few switches
and
that it is connected by wires to a radio. I already own an Alpine
CDM-7873R
CD reciever. Now I'd like to change radios, but I like the remote from
Philips. My question is: Alpine has a headphone jack style female
connector
on the backside for remote control of the unit. Does anybody know the
protocoll used by Alpine  to control this kind of car radio so that I
could
use the existing remote with Alpine?

Regards, Samo

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