Sony Ps-8750 W0W!
- Thread starter 88gibson
- Start date
That's great news. I'll be happy to share the cost. I received a response to an e-mail about same a couple of weeks ago. I spoke to four (4) different Sony people at the number they gave me to call and none of them knew anything about pulling out of their archives, as their e-mail response stated they could do. They were all located at some call center in Asia.
jorjen12
New Member
Sorry I did not see this sooner fellas. I have my original manual(and original lined alignment guage) that came with my 8750 right in front of me. What did you need to know?
As far as anti-skate is concerned, it goes as follows starting with the line/ring closest to the free end of the shaft(away from pivot):
2.5g, 2.0g, 1.5g, 1.0g, 0.5g.
Closest to the pivot being 0.5g.
The weight that is in front of the pivot(moves side to side)is the lateral tonearm adjustment weight. Arm must be at zero balance(static) with the anti-skate weight removed to adjust this weight. Lift the back end of the turntable off the surface it sits on, I usually support it with a couple books. I usually raise the rear 3"-4"(manual says it only needs to be 1cm). Remove arm from rest and swing over platter and release arm. If not set correctly the arm will either swing in towards the spindle or out towards the rest. Push/Pull the lateral balancer rod out/in, in the direction the arm is swinging. Keep doing this until the arm does not swing either way when released. Then adjust tracking force, arm height and then anti-skate.
As far as anti-skate is concerned, it goes as follows starting with the line/ring closest to the free end of the shaft(away from pivot):
2.5g, 2.0g, 1.5g, 1.0g, 0.5g.
Closest to the pivot being 0.5g.
The weight that is in front of the pivot(moves side to side)is the lateral tonearm adjustment weight. Arm must be at zero balance(static) with the anti-skate weight removed to adjust this weight. Lift the back end of the turntable off the surface it sits on, I usually support it with a couple books. I usually raise the rear 3"-4"(manual says it only needs to be 1cm). Remove arm from rest and swing over platter and release arm. If not set correctly the arm will either swing in towards the spindle or out towards the rest. Push/Pull the lateral balancer rod out/in, in the direction the arm is swinging. Keep doing this until the arm does not swing either way when released. Then adjust tracking force, arm height and then anti-skate.
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Any chance that you could share a copy? PM sent. Thanks.
Sony TT Cartridge Alignment
One major reason for the high quality of sound from the better/best Sony and other Japanese TTs with factory tonearms is the built in alignment gauges/protractors. Both my Sony PS-X500 and Yamaha PX-2 are are simple, fast and accurate when aligning a cartridge. Still not confident that my VPI table is aligned accurately, I'm on the lookout for a Dennison protractor, not cheap but probably the most accurate of all of them out there.
One major reason for the high quality of sound from the better/best Sony and other Japanese TTs with factory tonearms is the built in alignment gauges/protractors. Both my Sony PS-X500 and Yamaha PX-2 are are simple, fast and accurate when aligning a cartridge. Still not confident that my VPI table is aligned accurately, I'm on the lookout for a Dennison protractor, not cheap but probably the most accurate of all of them out there.
jorjen12
New Member
Did you get my email response Glenn? Just shoot me your addy and I will send a copy.
Also, in the opinion of the folks here, would one consider the tonearm on the 8750 low, medium or high mass? With no effective arm mass listed in the spec part of the manual, kind of makes it hard to calculate things like resonant frequency etc. for optimum cartridge selection. Never had anything besides a Shure V15 Type III on it. Time for something newer/nicer. If I am going to shell out 4,5,600 bucks for a new cartridge, I want the best match possible.
Also, in the opinion of the folks here, would one consider the tonearm on the 8750 low, medium or high mass? With no effective arm mass listed in the spec part of the manual, kind of makes it hard to calculate things like resonant frequency etc. for optimum cartridge selection. Never had anything besides a Shure V15 Type III on it. Time for something newer/nicer. If I am going to shell out 4,5,600 bucks for a new cartridge, I want the best match possible.
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Unda Maris
Mr. V-FET
According to my SONY literature the headshell alone has a mass of 10.5g
if you add 5..9g for the cartridge and let´s say 4g for the arm tube mass (unknown, because it is dependent to the position of the counter weight), you get a total effective mass of 19.5 ..23.5 grams, which can be probably considered medium to high mass.
According to the commonly used formula, this would need a compliance of about 13 .. 16 mm/N in order to get a 9Hz resonant frequency, which is recommended by SONY for the PS-8750.
The Denon DL-304 I use has a compliance of 14mm/N and a mass of 7g.
This would translate into a resonant frequency of about 9.1 Hz.
My PS-8750 plays very well with it, no bass resonance effects are audible, so reality seems to prove that.
Another DENON alternative could be the DL-160 or the DL-103 family, but these seem to be a little too low compliance for me, so you might add some mass (if possible).
The complete Ortofon MC range (except the heavyweight SPUs) seem to fall into the above compliance range.
According to my literature a Shure V15/III would be way too high compliance for the PS-8750, so you can expect better results with better fitting carts.
if you add 5..9g for the cartridge and let´s say 4g for the arm tube mass (unknown, because it is dependent to the position of the counter weight), you get a total effective mass of 19.5 ..23.5 grams, which can be probably considered medium to high mass.
According to the commonly used formula, this would need a compliance of about 13 .. 16 mm/N in order to get a 9Hz resonant frequency, which is recommended by SONY for the PS-8750.
The Denon DL-304 I use has a compliance of 14mm/N and a mass of 7g.
This would translate into a resonant frequency of about 9.1 Hz.
My PS-8750 plays very well with it, no bass resonance effects are audible, so reality seems to prove that.
Another DENON alternative could be the DL-160 or the DL-103 family, but these seem to be a little too low compliance for me, so you might add some mass (if possible).
The complete Ortofon MC range (except the heavyweight SPUs) seem to fall into the above compliance range.
According to my literature a Shure V15/III would be way too high compliance for the PS-8750, so you can expect better results with better fitting carts.
Thanks for the calc's, Mirko. Have run several cartridges on the PS-8750 and find that I prefer the sound of the MMs (Shure V15VxMR & AT150Ti) to the MC (Kontrapunkt b) with it. I'll try the DL-303 this fall. Also, the preamp & interconnects will have a big impact, as well. So is quite 'system specific'.
Got it and send along my address. Also have the the Sony Tech Report for the PS-8750 which has most of the design parameters and calculations for the PS-8750.
Looking forward to finally getting a copy of the owner's manual. Thanks. :thmbsp:
Sorry, mine is hard-copy, or I would.
gizzyman47
Addicted Member
I've got a PS-8750 table that's been just sitting unused since I got it. Got damaged in shipping. The strobe and auto lift doesn't work. Also suspect the tonearm bearings were damaged. Dust cover destroyed. The platter does spin at both speeds.
Beast of a table though! Need to either get it fixed, part it out or just sell as is.
Beast of a table though! Need to either get it fixed, part it out or just sell as is.
hrudulv
Member
WOW, such a beauty destroyed???
Mine, I bought it locally and is in a very good condition!
If you had the time I would fix it.