SDS Speed

SDS Speed

Postby ihmeyers » Tue Apr 16, 2019 4:57 pm

I bought a Super Scoutmaster Reference last week with an SDS. I bought the KAB strobe setup disc to make sure the speed was dead on. The disk came today and in order to get the 33 1/3 RPM speed just right I had to set the SDS to a frequency of 60.75. I don't have my phono stage hooked up right now so I haven't listened to it, but does this setting seem way too high? I live in S. FLA and line fluctuations here suck. I have a PS Audio line conditioner and voltage readout during the day can vary from 118-123.

Thanks much.

Ian
Florida, USA
Last edited by ihmeyers on Tue Apr 16, 2019 9:45 pm, edited 1 time in total.
User avatar
ihmeyers
Jr. Member
 
Posts: 19
Joined: Sun Mar 10, 2019 5:22 pm
Location: Florida

Re: SDS Speed

Postby Brf » Tue Apr 16, 2019 6:30 pm

60.75 hz is well within the acceptable range. Great table btw.
User avatar
Brf
Site Admin
 
Posts: 4033
Joined: Tue Aug 26, 2014 9:23 am

Re: SDS Speed

Postby ihmeyers » Wed Apr 17, 2019 9:07 am

Last night the SDS needed to be turned down from 60.75 to 60.34 for speed to be dead on. Florida power grid sucks. I'd hate to have to check speed with strobe every time I play a record. :(
User avatar
ihmeyers
Jr. Member
 
Posts: 19
Joined: Sun Mar 10, 2019 5:22 pm
Location: Florida

Re: SDS Speed

Postby Brf » Wed Apr 17, 2019 11:20 am

ihmeyers wrote:Last night the SDS needed to be turned down from 60.75 to 60.34 for speed to be dead on. Florida power grid sucks. I'd hate to have to check speed with strobe every time I play a record. :(


Unfortunately, that's not a Florida power issue. The SDS regenerates the frequency to a defined value. Make sure that you let the table bearing warm up and also to allow the SDS to stabilize before taking a measurement or speed adjustment.
User avatar
Brf
Site Admin
 
Posts: 4033
Joined: Tue Aug 26, 2014 9:23 am

Re: SDS Speed

Postby tony22 » Wed Apr 17, 2019 12:27 pm

Brent, how long does that usually take?
Pass XP-20 & XP-15, AVA 600R, Shahinian speakers, PS Audio DMP & DS, Avenger w/mods, 12" Fatboy gimbal + 2nd mount, Benz LPS, VAS & SS carts, Ortofon Quintet Mono, Logitech Touch, RSA Haley and PSA conditioning, PAD and AZ cables.
User avatar
tony22
Senior Member
 
Posts: 840
Joined: Thu Nov 05, 2015 4:38 pm

Re: SDS Speed

Postby Brf » Wed Apr 17, 2019 2:36 pm

tony22 wrote:Brent, how long does that usually take?


I usually wait for about a 1/2hr.
User avatar
Brf
Site Admin
 
Posts: 4033
Joined: Tue Aug 26, 2014 9:23 am

Re: SDS Speed

Postby ihmeyers » Fri Apr 19, 2019 9:20 am

Brf wrote:
tony22 wrote:Brent, how long does that usually take?


I usually wait for about a 1/2hr.


When you say warm-up do you mean with the platter spinning? As far as the SDS warming up, I leave that on all the time. Should I not be doing that?

Thanks :D
1: Maker Ref 2A, NAT Magnetic Preamp, PS Audio DMP & DSD, Hansen "Prince" Speakers, SR Atmosphere XL-4 & Powercell 10

2: VPI Super Scoutmaster Ref w/JMW-12 3DR, Benz Gold, VTL ST-85 Amp, Parasound JC3+, Zesto Andros SUT, AZ Adaggio Jrs.
User avatar
ihmeyers
Jr. Member
 
Posts: 19
Joined: Sun Mar 10, 2019 5:22 pm
Location: Florida

Re: SDS Speed

Postby tom collins » Fri Apr 19, 2019 3:05 pm

The platter spins and warms up the grease. One side of an average record will do in spring. In winter, maybe a little longer if the room is cool. During this time, your electronics are also warming up and should really sound good too after that first side. make your adjustments then.
TNT6HR, rim drive, superplat, outer ring, center weight, 12.0 arm, 12.7 arm, SDS, SRA platform; Soundsmith Gold Denon, Zu, Grado ME+ carts; Cary Audio PH302 ver 2 phono-pre; Cary 30i prototype EL34 integrated amp; Devore Gibbon 8 speakers; PSB sub.
tom collins
Senior Member
 
Posts: 449
Joined: Mon Aug 25, 2014 10:30 pm

Re: SDS Speed

Postby Votan » Sat May 11, 2019 11:29 am

Hi ihmeyers,
Everything said above concerning warm up waiting before you adjust 33 1/3 RPM via SDS is crucial, both because warm up positively affects to the viscosity of lubricants and to the desired relaxation of the belts.
But additionally make sure that when you adjust 33 1/3 RPM, to have your stylus in the grooves (preferably in the center grooves of the record) with platter spinning, because stylus drag is braking the platter. As well to have placed the center clamp and /or periphery ring, because their added weight slows down the RPM due to the grater friction on the bearings.
Of course this is not possible with strobes that have the size of an LP record. For that reason I have found a strobe having the size of a CD.
Prime Signature+10”3DR in Finite Element(FE) platform,ADS,Lyra Delos, WW Silver Eclipse 8 Phono Cable., Groove Plus-SRX MkII Phono Stage, Moon 740 Pre,Moon 820 PSU,ATC 100 Active Speakers, AQ Niagara IC,WW Silver Electra 7 A/C, FE Ref Rack, RPG Treatment.
User avatar
Votan
Senior Member
 
Posts: 105
Joined: Sun Dec 02, 2018 4:59 pm
Location: Greece

Re: SDS Speed

Postby WntrMute » Sat May 11, 2019 6:31 pm

Actually clear records such as Lucinda Williams "Beloved" or "West" can be used to further evaluate speed issues. Plop your KAB strobe disc down, clear record on top and have at it. I've found that TT's with frequency governed motors, like the VPI's, are fairly immune to things like needle drag while motors like in my Thornes TD-124, that use eddy brakes to control speed, are much more sensitive to the drag of the stylus. Of course - YMMMV and Objects are Closer Than Appear may apply.
User avatar
WntrMute
Senior Member
 
Posts: 600
Joined: Wed Aug 27, 2014 8:42 pm

Next

Return to Support Forum

Who is online

Users browsing this forum: No registered users and 3 guests

x