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Technics ground wire

mswer

mswer

Needs some space to think
I recently picked up a Technics SL-DD22 on the cheap from Craigslist. It was a bit dusty, and certainly is nothing special, but it works fine and is in good shape (albeit missing the dust cover).

My only problem with it is that Technics used some silly (proprietary?) ground plug rather than just using a post or screw. I tried to find something that would fit it but as of yet, I've not succeeded. It looks a great deal like a modern AC adapter plug, with a single thin pin in the middle. I have a few dead/beat-up and unused AC adapted lying around so I checked to see if any of those would fit to make a makeshift ground (by just cutting the plug end off and stripping some of the plastic), but none did. I tried some various audio cables I had around, also to no avail.

I found this Technics ground wire by Googling around, but I can't really tell if it will fit my model, etc.

So, what I'm looking for is suggestions for alternatives for a makeshift ground. My TT is buzzing like hell right now. I imagine I could crack it open and solder something to something, but I don't have a soldering iron. Also, I don't think this cheap table is really worth a mod. Any ideas?
 
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There should be somewhere inside to to attach a ground wire under an existing screw. No soldering necessary.
 
I believe it's just a hole where a solid pin makes contact inside. Try using some 12 or 10 gauge stripped electrical house wire as the pin and then solder or wrap some narrow gauge wire around it to use as the ground wire.
 
1. Remove the bottom.
2. Note the shield next to the RCA jacks (and also next to the ground receptacle).
3. Next to the shield, cut a tiny v-shaped notch with diagonal cutters.
4. Take a piece of wire #18 - 22 AWG and tie two tiny knots in the wire about 1/2" apart and very close to one end.
5. Solder the wire to the shield. There should be about 1" of distance between the solder point and the first knot.
6. Slip the wire into the notch, so that one knot is on the inside and the other on the outside.
7. Put the bottom back on.
8. Strip and tin the other end of the wire.

Problem solved. I've done this about 500 times.

Fred
 
One trick I learned was you can use a RCA phono plug on it.Just clip the ears off the plug end and it's a good toght fit.Then just cot the other end off and use as a regular ground wire.
 
Thanks for the tips all. I've got something makeshift set up for the time being (it's a super ghetto version of Fred's suggestion) that has all but eliminated the hum, so I'm satisfied for now. :thmbsp:
 
Technics TT ground wire fix

Rat44 said:
One trick I learned was you can use a RCA phono plug on it.Just clip the ears off the plug end and it's a good toght fit.Then just cot the other end off and use as a regular ground wire.
Click to expand...

Help me, I'm a novice - I don't understand this fix. picture? Thanks.
 
Rat44 said:
One trick I learned was you can use a RCA phono plug on it.Just clip the ears off the plug end and it's a good tight fit.Then just cot the other end off and use as a regular ground wire.
Click to expand...
I've done this as well. It works best if you get the RCA plugs with the exposed flaps for the collar/sleeve as opposed to the ones that hide the sleeve under insulation. Like this
images


as opposed to this
images
 
Or you can completely remove the center pin by essentially cutting everything else away and then solder a wire directly onto the back of the pin. You can finish it with shrink tubing and end up with something that closely resembles the original.

John
 
The ground wire you found is correct. technics used 2 different types of removeable ground wires, one with a pin in the center and one without.
The center post of an RCA jack works perfectly on the pinless type.
 
Just made one for an SL-DD22 out of a butt connector.

c45_038.jpg


You may have to squeeze one end of the connector until it fits the center pin snugly and then just crimp your wire to the other end. Also, you'll probably have to trim back the insulation on one end so that the connector will go all the way into the jack. Heat shrink optional.
 
Last edited:
A cheapo banana plug from ratshack will fit nicely as well, with a wire of your choice.

John
 
Fred Longworth said:
1. Remove the bottom.
2. Note the shield next to the RCA jacks (and also next to the ground receptacle).
3. Next to the shield, cut a tiny v-shaped notch with diagonal cutters.
4. Take a piece of wire #18 - 22 AWG and tie two tiny knots in the wire about 1/2" apart and very close to one end.
5. Solder the wire to the shield. There should be about 1" of distance between the solder point and the first knot.
6. Slip the wire into the notch, so that one knot is on the inside and the other on the outside.
7. Put the bottom back on.
8. Strip and tin the other end of the wire.

Problem solved. I've done this about 500 times.

Fred
Click to expand...

+1:thmbsp:
 
Or just google for SJPB7M. That's the original cable - and still available for a couple of bucks...

Greetings from Munich!

Manfred / lini
 
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