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Vintage Tape (Audio), Cassette, Wire and Magnetic Disc Recorders and Players Open-reel tape recorders, cassette recorders, 8-track players etc.

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Old 11th Jun 2018, 7:43 am   #1
crackle
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Default 5 pin DIN type "Domino" headphone socket wiring.

Please can anyone identify the correct terminology for the 5 pin headphone socket seen on this ITT Studio 720.
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Thanks
Mike
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Old 11th Jun 2018, 7:49 am   #2
radioman
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Default Re: 5 pin DIN type headphone socket

'Domino' type I believe.

Andy
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Old 11th Jun 2018, 8:02 am   #3
crackle
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Default Re: 5 pin DIN type headphone socket

Hi Andy
Thanks very much, item now located on ebay.
Appears to be also known as 5 pin 360 deg, Domino plug.

Just as a reference here is the wiring diagram for the ITT Studio 720
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I wonder if the mods could please change the title to 5 pin DIN type "Domino" headphone socket wiring

Thanks
Mike

Last edited by crackle; 11th Jun 2018 at 8:12 am.
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Old 11th Jun 2018, 9:11 am   #4
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Default Re: 5 pin DIN type headphone socket

Mike,

If you need a plug I have loads of NOS. Happy to send one in the post FOC.

Peter
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Old 11th Jun 2018, 9:56 am   #5
crackle
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Default Re: 5 pin DIN type headphone socket

Hi Peter
Thanks very much for the kind offer, I was actually asking on behalf of a question I got via my website.
But it would also be useful for me to have one as I have a couple of dozen ITT cassette players and there are bound to be a few which use this type of plug.

I will send a PM
Thanks
Mike
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Old 11th Jun 2018, 10:37 am   #6
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Default Re: 5 pin DIN type headphone socket

Quote:
Originally Posted by crackle View Post

I wonder if the mods could please change the title to 5 pin DIN type "Domino" headphone socket wiring

Thanks
Mike
Done.
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Old 11th Jun 2018, 12:06 pm   #7
TonyDuell
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Default Re: 5 pin DIN type "Domino" headphone socket wiring.

I've also seen it called 'type C' or 'form C' (where type A is the normal 180 degree one used for most audio applications and type B is the 240 degree one like the 6 pin DIN plug without the middle pin, as used on Philips cassette recorders for the power supply/remote control socket).

And 'quincuncial' (a 'quincunx' is the term for 5 dots in that pattern).

And I think some version of die/dice (obviously from the pattern on the gambling device).

When wiring the headphones, it is conventional to ignore the middle pin and to wire the headphone coils to diagonally-opposite pairs of pins. The plug will go in the socket 2 ways round, some machines use this feature to only cut out the internal speakers in one of those orientations, so you can have headphones and speakers or just headphones. Wiring the headphones as I described means that turning the plug over inverts the phase of both channels, but keep the channels the correct way round.
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Old 11th Jun 2018, 2:35 pm   #8
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Default Re: 5 pin DIN type "Domino" headphone socket wiring.

They where used on the BBC micro for serial comms, easy to swap round to get RX/TX right. Well it would have been if the bloke doing the PCB layout got it right, I have seen the original red/blue artwork (in the blokes house, I don't want to embarrass him so no name), the only mistake made he said.
 
Old 11th Jun 2018, 4:54 pm   #9
TonyDuell
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Default Re: 5 pin DIN type "Domino" headphone socket wiring.

Also used for the RS232 (serial) port on the Tatung Einstein computer, and they did get the wiring right on that. Turning the plug over swaps TxD and RxD and also RTS and CTS.
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Old 12th Jun 2018, 8:46 am   #10
crackle
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Default Re: 5 pin DIN type "Domino" headphone socket wiring.

By the way, the guy who contact me and asked this question also says "thanks very much"

Mike
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