of a Lifetime
TURNTABLE SPEED TESTER
The KAB SpeedStrobe was designed to replace and
improve upon older strobe designs that relied on power line frequency. We also
wanted something that was easier to use and included the ability to actually
measure small amounts of error. Not just a go - no - go - test.
The KAB SpeedStrobe features a quartz locked
illuminator with 99.99% accuracy. And since it is battery operated, it works
everywhere. No need for 50 or 60 Hz versions. The Disc is silk screen printed
on durable 20 mil PVC.
Instead of hypnotic bars, the KAB SpeedStrobe
features the actual speed numbers. In use, the desired speed is read directly
from the disc. no searching for the right band. Covers 16.66, 33.33, 45, 70.59
- 90 RPM. By timing the drift of the display over one minute, accuracy can be
measured to 0.03%
Click here to read how strobes work.
- 10" 20 mil PVC
- Color: Black W/ White
- Quartz Locked 60 Hz.
- Accuracy: 99.99%
- Speed Range: 16, 33, 45 70-90
- Battery: Std. 9V
- Shipping Weight: 2
Many Hi End turntables today still use
hysteresis synchronous motors which rely on the line frequency to achieve
accurate rotation. Using a conventional strobe to measure these turntables
reveals a flaw: If the line frequency is low, the turntable will run slow, but
so will the fluorescent light used to illuminate the strobe disc. Result: the
strobe may show the correct speed, even though it is wrong! There is a definite
need for an independent quartz crystal controlled illuminator.
The KAB SpeedStrobe is fully independent
thereby eliminating major sources of error. And the large disc is very easy to
MARKER: 16 33 45 70 72
SPEED RPM: 16.66, 33.33, 45.00, 70.59, 72.00
MARKER: 73 75 76 78 80
SPEED RPM: 73.47, 75.00, 76.59, 78.26 80.00
MARKER: 81 83 85 87 90
SPEED RPM: 81.82, 83.72, 85.71, 87.80, 90.00
TO EVALUATE DRIFTING SPEED, TIME THE NUMBER OF ICONS
THAT MOVE IN AND OUT OF THE SPOTLIGHT IN 60 SECONDS.
TO COMPUTE ACTUAL SPEED,USE THE FOLLOWING FORMULA:
ACTUAL SPEED = 1 + (#ICONS DRIFT PER MIN / 3600) X RPM
TO COMPUTE THE PERCENT OF ERROR, USE THE FOLLOWING FORMULA:
DRIFT IN PERCENT = (#ICONS DRIFT PER MIN / 3600) X 100
| GREAT FEATURES
- Easy To Use
- Battery Operated, Works
- Very Accurate &
- Stereophile® Recommended
Component 16 years.
Turntable Speed Often!
The really great features to take note of
with the KAB SpeedStrobe is the ease of use and absolute accuracy.
The KAB SpeedStrobe is unique in 2 ways.
First, it does not rely on line frequency like other strobe discs. We have
heard our share of stories that confirm what we have always suspected: line
frequency variations are common. And if your turntable uses a hysteresis
synchronous type motor, it will be susceptible to speed variations.
Second, conventional strobe discs use a
series of hypnotic bars that "freeze" in motion when the turntable is at the
correct speed. Thats fine for a turntable that can adjust its speed. But have
you ever tried to time those marks so you can measure accuracy? It is nearly
impossible. The KAB SpeedStrobe disc uses large easy to read numbers. It is
very easy to time the drift of this display. This lets you measure fixed speed
turntables and determine their accuracy.
KAB SPEEDSTROBE TURNTABLE SPEED TESTER
KAB ELECTRO ACOUSTICS
PLAINFIELD, NJ 07062, USA