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EMI Emidicta Recorder 2403/12

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FIXITNOW2003
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picked this disc tape player/recorder up the other day sadly not complete
will posable remove the amp section to use elsewhere any one got a circuit

Any way opened her up, so here some pictures of the inside. Uses Marconi valvesZ729/ZD152/LN152 AND A U78/6X4

cheers
vince

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Topic starter Posted : 23/12/2013 1:49 pm
Refugee
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What parts are you short of?

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Posted : 23/12/2013 2:37 pm
FIXITNOW2003
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there should be a microphone which has the deck control buttons built in it

and some recording media would at least get me started

a user guide and some service data would be of great help to
info about the telephone interface would also be good

a retro answer machine now there is a talking point !! Lol

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Topic starter Posted : 23/12/2013 3:12 pm
Refugee
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It should not be difficult to replicate the switches and get it running.
Media can be found quite often but certainly not on a regular basis.

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Posted : 23/12/2013 3:37 pm
Spot-Wobble
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Hi,

I have an earlier model, around 1948. Complete with Mike, headphones, cleaning kit and DC- AC convertor.
Complete with stand. No disk though.
If you would like it it is all yours!
Could deliver down south sometime next year.

Andy

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Posted : 23/12/2013 6:19 pm
Refugee
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Well it would be a shame to to strip it down for spares.
I think it better that I go on standby to re-home it if there is no interest from anyone whom seriously wants one.

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Posted : 23/12/2013 9:43 pm
Anonymous
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I would love one. But the transport cost would be eye watering.

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Posted : 23/12/2013 9:53 pm
Refugee
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I have got a germanium transistor one that had its belts replaced about 10 or 15 years ago.
It uses a cross between a cassette and a reel to reel tape and is made by Philips.

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Posted : 24/12/2013 4:13 am
FIXITNOW2003
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she is a heavy beast also i have the trolley to stand her on

not my area of collecting

so would be nice to pass on

but i could find a use for her amp if nothing else thou a circuit would help
vince

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Topic starter Posted : 24/12/2013 9:20 am
Anonymous
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Valve amps are common. Emidicta is rare. If I was within 80 miles driving distance I'd offer you a valve amp in exchange!

It's not going to be HiFi or a loud amp either, a decent ECL82 / ECL86 / UCL83 etc amp with some feedback will do better.

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Posted : 24/12/2013 11:35 am
FIXITNOW2003
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then i will keep hold and see if anyone is intressed in it

vince

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Topic starter Posted : 24/12/2013 11:44 am
Refugee
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Do you know what the media is made of?
It can't be that difficult to reproduce surely.
Is it wax on a substrate or something harder?

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Posted : 24/12/2013 3:28 pm
Spot-Wobble
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It's magnetic media.
A flexible disk with a coating of Ferric Oxide - like tapes for reel to reel tape recorders.
There should also be a 'stylus' in the head. This is held in place by a knurled thumb wheel type screw.
I had a couple of these machines in the early 70's when they could be got for £1 each at the surplus store - Eley Electronics in Leicester. I used to go there every Saturday.
Does your machine have Octal or B9A valves.
The later model uses an ECL80 as amplifier and erase/record bias oscillator.
In the head there is a solenoid which is actuated via a push button on the microphone and allows the user to move the head across the disc in order to select different recorded dictation.
My father even managed to get me an instruction manual from EMI at the time!
The machine was my first recording device and I thought it was fantastic at the time.
I couldn't afford a tape recorder then.

Andy

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Posted : 24/12/2013 3:59 pm
Anonymous
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I wonder would inside of 8" floppy work?

Alternatively soak off tape coating and let it dry on mylar disks.

Isn't the inner disc used as track guide?

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Posted : 24/12/2013 4:20 pm
Refugee
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I was thinking along the lines of a 5 1/4 floppy with an old CD as a substrate.

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Posted : 24/12/2013 4:25 pm
Anonymous
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I think too small as there is an inner tracking disk.

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Posted : 24/12/2013 4:46 pm
Refugee
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Oh dear where have all those old laser disks gone?

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Posted : 24/12/2013 5:41 pm
Terry
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I may be thinking of an alternative device (PYE ...?) but the one I have in mind has a spiral guide for the 'stylus' bonded to a ferric oxide disc.

The 'stylus' is a thin record/play head ...

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Posted : 24/12/2013 11:44 pm
Refugee
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I have had a close look at the first photo.
Is the middle of the turn table a spiral grove and the outside where the magnetic disc goes?
I can see a cut out switch pushed by something that runs in a grove in the top of the left hand arm by a rocker shaped part.
The right hand arm looks like there could be a tracking pin in the left hand side of the head and a magnetic head on the right side.
Is the record head in the left hand arm?

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Posted : 25/12/2013 1:04 am
Spot-Wobble
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The tracking and record is all in the right hand arm.
The left hand arm contains a magnet which can be used to erase the disk.
It also holds the central disk which has a spiral groove in it like a record.
The magnetic disk is secured by this arm assembly.

Andy

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Posted : 25/12/2013 2:40 pm
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