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Old 21st Feb 2009, 7:14 pm   #1
NickVyse
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Default iPod to 6 pin DIN on Becker car STEREO??

Hi all - first post on the forum and here to get knowledge as on the subject of old radios I have very little to give!

I have instructions to wire up a 3.5mm stereo jack to a 6 pin DIN socket as found on many 60's and 70's car radios. However, I believe the 6 pin DIN is for a mono input, with pins 1 and 2 bridged.

This is fine except my old Becker head unit is stereo and yet it still has the 6 pin DIN and not a 270 degree 8 pin DIN I expected.

Does this make sense to anybody and do you know if I can wire in a stereo input or am I stuck with mono??

If it's the latter then is it possible to wire an input into the guts of the cassette player? I'll never be using the cassette so that's not an issue. Probably a naive question, but could plug into the wires coming from the cassettes head unit?

Thanks all.

Nick
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Old 21st Feb 2009, 10:44 pm   #2
dseymo1
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Default Re: iPod to 6 pin DIN on Becker car STEREO??

I'm not quite clear whether it's the source or the amplifier which has the DIN connector, but if I understand your query correctly, you have a amplifier or radio with 6-pin socket, to which you want to feed a stereo signal.

If that's the case, you can experiment as follows:

Connect the signal ground connection of your input device to the ground of the radio (ensure both are the same polarity, - + or - ground, if they share a power supply).
Take a flying lead from one of the output channels, and connect it experimentally to each of the DIN socket terminals in turn - use a capacitor of, say, 10 uF in series to avoid possible damage in case the socket carries power connections. Those which accept a signal will clearly produce an output from the corresponding amp. You will then know which to connect to, assuming that stereo inputs are available.

It's difficult to see why a stereo device would be fitted with a mono-only input socket.
However, if only a mono input is provided, you will need to trace the circuit to find a suitable stereo connection point (the volume control may be a good place, but might need capacitors in line with the inputs).

The tape head will produce a very low level signal , which also requires frequency compensation, so is an unsuitable point for direct connection to a line level signal.
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Old 22nd Feb 2009, 1:32 am   #3
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Default Re: iPod to 6 pin DIN on Becker car STEREO??

An easy way is to use a cassette converter, looks like a cassette with a screened lead on to a stereo jack.

Lots of them on ebay.
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Old 22nd Feb 2009, 8:37 am   #4
NickVyse
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Default Re: iPod to 6 pin DIN on Becker car STEREO??

Thanks for the replies - to clarify, you are right, I have a stereo car radio/cassette and wish to connect and external aux input. I have found instructions detailing how to do this, but these details state a 6 pin DIN is for mono models and a stereo unit has an 7+1 pin DIN.


The first diagram is the wiring diagram for the 6 pin.

This is what had me confused as my stereo unit has this 6 pin DIN, with the same pins bridged, which in my mind suggest it's a mono-only input.

The second diagram shows the wiring for a stereo 7+1 pin DIN, which logically has 2 pins bridged.

I'm aware of the dummy cassette input option, but don't want a cable hanging out the front of the unit and have made an assumption that the quality can only be as good as a cassette. Right or wrong?

Cheers, Nick
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Old 22nd Feb 2009, 8:55 am   #5
'LIVEWIRE?'
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Default Re: iPod to 6 pin DIN on Becker car STEREO??

I'm not 100% certain, but AFAIK, Becker Car Stereos used the same DIN standard connections to that socket as Blaupunkt, which is basically as you described, Nick. A second thought occurs, though, which is that the 6pole socket may be for a plug-in ASU(Noise suppressor) or VRF(Traffic Broadcast)Decoder. If so, it will be wired ahead of the internal FM stereo decoder(if that is present)so will not be stereo. Do you know the model no. of your Becker. I MAY have some info. Alternatively have you checkedhttp://www.radiomuseum.org
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Old 22nd Feb 2009, 10:09 am   #6
NickVyse
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Default Re: iPod to 6 pin DIN on Becker car STEREO??

Quote:
Originally Posted by 'LIVEWIRE?' View Post
I'm not 100% certain, but AFAIK, Becker Car Stereos used the same DIN standard connections to that socket as Blaupunkt, which is basically as you described, Nick. A second thought occurs, though, which is that the 6pole socket may be for a plug-in ASU(Noise suppressor) or VRF(Traffic Broadcast)Decoder. If so, it will be wired ahead of the internal FM stereo decoder(if that is present)so will not be stereo. Do you know the model no. of your Becker. I MAY have some info. Alternatively have you checkedhttp://www.radiomuseum.org
Thanks Livewire - it looks very similar to this 663, but it's branded BMW Bavaria and any sticker/codes on the chassis are long gone:

Since last night I've discovered I can buy an interconnect exactly for my purpose from a couple of classic Becker specialists, but at €25 plus postage I'd prefer to see if I can wire my own. They also offer mono or stereo wired cables, but I've yet to ascertain if the stereo variant is for my 6 pin DIN. Difficult to see form the picture - I've emailed them for clarification.

I'm having a trawl through radiomuseum - cheers.
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Old 24th Feb 2009, 11:41 am   #7
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Default Re: iPod to 6 pin DIN on Becker car STEREO??

The DIN Plug in that adapter lead LOOKS like a 5 pin 180degree one, so it should be wired for stereo, but €25(about £21-£22) does seem a bit much. Is the connector on the other end just a 3.5mm jack socket in a fancy housing(Why not a stereo 3.5mm jack PLUG?)
Somewhere I have a circuit diagram for a Becker Mexico Radio Cassette Player, but I can't find it. Have you found the answer yet, by the way?
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Old 26th Feb 2009, 8:20 pm   #8
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Default Re: iPod to 6 pin DIN on Becker car STEREO??

The only Becker Circuit Diagram I can find is one for an Europa MU dating from the 1970s, and this is a MONO Radio, with the 6pin DIN socket wired to the standard for mono cassette players. Not much help to you, I'm afraid.
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Old 29th May 2009, 8:51 pm   #9
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Default Re: iPod to 6 pin DIN on Becker car STEREO??

Nick, did you sort out a connecting lead for your Becker. I have just noticed that the way both the mono and stereo leads in those diagrams are connected(ie. with pins 1 &2 in the mono version, and 1 to 3 & 4 to 5 bridged in the stereo one) leaves the Radio Audio in circuit when the CD Player, etc., is connected. This presumably is to avoid the need for a 'Radio/Aux' switch, which would be a better way to make the connections
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