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PostPosted: Tue Sep 05, 2017 9:26 am 
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So I was trying to tweak the alignment of my cartridge (London Decca Super Gold) the other day and made things worse.

It appears to be level, and aligned (via a protractor), yet it is decidedly "out of phase" e.g. the sound from some channels sounds like it is coming from another room in the distance?

I'm running out of ideas to troubleshoot this.

Any comments would be greatly appreciated!

TIA,

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PostPosted: Tue Sep 05, 2017 10:04 am 
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Location: Markham, ON, CA
NordicNorm wrote:
So I was trying to tweak the alignment of my cartridge (London Decca Super Gold) the other day and made things worse.

It appears to be level, and aligned (via a protractor), yet it is decidedly "out of phase" e.g. the sound from some channels sounds like it is coming from another room in the distance?

I'm running out of ideas to troubleshoot this.

Any comments would be greatly appreciated!

TIA,


Norm,
I hope I am wrong, but one of the leads to the cart may be broken. I experienced the exact same problem. My Cardas wire had broken just behind the cartridge clip. It was making contact, albeit marginally. I swapped leads on the cart and the "bad channel" followed the broken lead. :cry:


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PostPosted: Tue Sep 05, 2017 1:51 pm 
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Location: Thornhill, ON, CA
NordicNorm wrote:
So I was trying to tweak the alignment of my cartridge (London Decca Super Gold) the other day and made things worse.

It appears to be level, and aligned (via a protractor), yet it is decidedly "out of phase" e.g. the sound from some channels sounds like it is coming from another room in the distance?

I'm running out of ideas to troubleshoot this.

Any comments would be greatly appreciated!

TIA,


It's a write-off. Just send it to me, I will reimburse you on the postage. Consider it a free disposal service.

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PostPosted: Tue Sep 05, 2017 2:12 pm 
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Location: Richmond Hill, ON, CA
Make absolutely sure that the leads are all in the right places. I don't know Decca, but I have seen the wires for each channel vertically paired, horizontally paired, and diagonally paired.
For anyone who is not 100% sure:
Red - right hot
Green - right ground
White - left hot
Blue - left ground.
This can be checked with a multi-meter, headshell wires to RCA plugs.
If everything looks ok, and the signal is still out of phase, reverse the wires of one channel, at the cartridge.
Always use small needlenose pliers to grasp the solder tags on the pin clips. Do not pull on the wires.

Cheers,
Alec


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PostPosted: Tue Sep 05, 2017 5:00 pm 
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Location: Moncton, New Brunswick, NB, CA
It's been a LONG time, (1970's), since I ran a Decca cartridge.......but didn't some of them have a rather unusual 3 lead, 3 pin wiring.....not the usual 4?

I do distinctly remember that my Decca was the best cartridge I ever owned for bass frequencies......and the fact that it's "cantilever" was a thread.

Cheers, del Sol


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PostPosted: Wed Sep 06, 2017 4:09 am 
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del Sol wrote:
It's been a LONG time, (1970's), since I ran a Decca cartridge.......but didn't some of them have a rather unusual 3 lead, 3 pin wiring.....not the usual 4?

No, the modern Decca's have 4 pins now.

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PostPosted: Thu Sep 28, 2017 5:01 pm 
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An update (if anyone cares...).

Turned out to be my tonearm. I brought my Decca over to a friend's and we installed it on his deck (an Oracle Mk IV). It sounded very nice indeed!

I just might now be tempted to go to an air-bearing tangential arm!

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PostPosted: Thu Sep 28, 2017 5:10 pm 
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Location: Fairport Beach (in Pickering), ON, CA
Thanks for posting a follow up Norm!

All too many threads leave us .... hanging :D when the outcome isn't posted.

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Collecting vintage tube Pilot (Pilotone) HiFi gear.


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PostPosted: Thu Sep 28, 2017 5:34 pm 
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NordicNorm wrote:
An update (if anyone cares...).

Good to know. What arm was causing the phasey sound?

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PostPosted: Thu Sep 28, 2017 5:43 pm 
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NordicNorm wrote:
An update (if anyone cares...).

Turned out to be my tonearm. I brought my Decca over to a friend's and we installed it on his deck (an Oracle Mk IV). It sounded very nice indeed!

I just might now be tempted to go to an air-bearing tangential arm!


I can recommend a MG-1 MK1 Air Bearing Linear Tracking Tonearm...in a hobby that has no 'giant killers' this is a 'giant killer'!!! 8)

I will never sell the one I own.

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