Of course, this is just my opinion: In the My first TT (Bought along wit my ADVENT 300 receiver in 1977), was a (Connoisseur BD2/A belt drive (England origin [from AR Sugden & Co). Arthur Sugden was a genius, the Connoisseur was a jewel in the rough, and at the time one of the best, if not the best TT value in audio.
Along for the ride was a Sugden supplied Perspex cover and a SHURE Cart (Shure M75EJ Type 2 mounted on the SAU2 arm.
The basic deck is competent, if a little quirky:
Provided the motor suspension is properly set up, that is, good rubber and correct pulley height, the drive is reliable.
It was cheap, even then, but a brilliant bit of engineering. Keep size down? use a 10 platter. Keep motor noise down? use a feeble motor (how much effort is needed to maintain speed?) and have a little rubber button on the start switch to flick the platter in the right direction when you turn on and apply a brake when you turn off. Reduce stiction in the p/u arm? drop the (extremely thin) signal cable through the pivot axis to minimize drag and angle the gimbals at 45/135 deg. instead of 0/90 - head shell rotation is minimal and as a bonus anti-skate is achieved just by hanging a weight off the inner gimbal. Damp out tonearm resonance? use squidgy stuff to mount the counterweight instead of metal-to-metal. Arm effective mass still a bit high (so use an amp with a decent subsonic roll-off)
Its Achilles heel, was its simplicity. It was reasonable reliable, but it did suffer from one major issue. The primary issue was the motor mounting support. Over time the rubber cradle would perish and had to be replaced from time to time. An additional rubber band was also use to keep the motor stable during start up and again this band failed on countless occasions. And the drive belt also required replacing from time to time (as with all belt drive turntables).
I used this until 2001 (upgrading SHURE's along the way [always the top of the live V series]and still have it).
At the time: Everyone who heard mine found the sound stunningly good.
It had essentially the same performance and specification as the BD1 unit.
The main differences are the larger platform and integral with this is the lift / lower mechanism for the pick-up arm.
The BD2 is designed for sprung anti-vibrational mounting.
Specifications
Drive motor: synchronous constant speed 375rpm at 60Hz
Speeds: 33.33 and 45rpm (manual change)
Platter: 10 1/4" (26cm) lathe turned aluminum casting with precision ground spindle and phosphor bronze bearing
Drive: precision ground round section rubber belt
Performance: considerably exceeds broadcast specifications (at the time) for turntables in respect of hum, rumble, wow and flutter
Rumble: -60dB
Hum: -80dB
Wow and flutter: less than 0.1%
My next TT (and current one):
Technics SL-M3
Quartz Controlled Direct-Drive Fully-Automatic Turntable System (1984-1988)
(1 review)
with linear tracking tonearm
Specifications
Type: fully automatic
Drive method: direct drive
Motor: brushless DC motor
Drive control method: quartz phase locked control
Platter: 325mm, 2.5kg, aluminum die-cast
Pitch control: +-6% range
Speeds: 33 and 45rpm
Wow and flutter: 0.022% WRMS
Rumble: -82dB
Tonearm: dynamically-balanced linear tracking
Effective length: 238mm
Effective mass: 13g (including cartridge)
Cartridge: moving magnet
Replacement stylus: EPS-33ES
Dimensions: 526 x 205 x 425mm
Weight: 15kg
Not much to say about this one except:
The T4P has it's own particular specifications (VS the somewhat generic P-Mount term).
The P-mount arrangement preceded the Matsushita (Technics) proposal for adoption of their T4P standard, which specified use of the P-mount method for affixing the cartridge to the tonearm, along with standardization of a number of technical variables, including:
- Cartridge weight
- Tracking force
- Compliance
- Plug length
- Screw hole placement
- Stylus position
The idea, effectively, was to create a plug and play cartridge and tonearm...no need to fiddle with tracking force, VTA, alignment, anti-skate, etc.
In practical terms, this means, for example, a non-T4P (but still P-mount) cartridge might require a different tracking force...which could be a challenge on a tonearm designed to the T4P standard. Or it might have different physical dimensions, resulting in incorrect VTA when used on a T4P tonearm.
I use various SHURE V-15 equivalent P-Mount T4P PHONO CARTs , as well as the original Technics cart (those running at 1.25 gram TF) and a GRADO GOLD3 (GOLD 3) running at 1.5 gram TF.
It works well and sounds (to me) great.
And my third TT (also in current use) & running a SHURE IV
(and yes, I use it for stacking records, just as the engineers intended):
Description
With the 1229, Dual has achieved what many audio experts have called the no-compromise automatic.
The most dramatic example of this is the mode selector that shifts the entire tonearm base - down for single play, up for multiple play.
Thus the stylus tracks at precisely the correct angle in both modes of play.
The 8 3/4 inch tonearm, the longest of any automatic, tracks flawlessly at as low as 0.25 gram.
Other 1229 features include 12 inch a dynamically balanced 7lb platter, powerful continuous pole / synchronous motor, built in illuminated strobe with adjustable viewing angle and a calibrated tracking pressure dial.
The unit has 3 speeds with one semitone pitch variation on all three speeds and the torsionally rigid, extra-long all-metal tonearm features four-point Gimbal type bearing.
Specifications
Drive: synchronous continuous-pole motor with radial elastic suspension
Platter: non-magnetic, dynamically balanced, weighing 3,1kg
Speeds: 33.33, 45 and 78rpm
Pitch control variation: 6%
Speed accuracy deviation: +-0.06%
Signal to noise ratio: -63dB weighted
Tonearm: extra-long, torsionally rigid metal arm, in 4-point gimbal suspension, with skeletal head design
Cartridge holder: removable, accepts all 1/2" cartridges from 1 to 12g
Dimensions: 376 x 308mm
Weight: 7.2kg
If you take a little time using two small metric scales and a strong lighted magnifier to see if the overhang and angle adjustments are accurate, and a test record to check anti-skate and tracking force, then you'll have one awesome sounding turntable. I've had good results using 1 to 1.25 grams tracking force, even with bass drum playback.
One day, far in the future (maybe), I'll get some measurement gear and test these last 2 out. But, in the mean time, I'll just enjoy them.