Dual 1019 - Page 7

Feathorlight Tripping
The tripping action is accomplished by a light-
weight glider which rides freely on a ball bearing
toward the center ox the tonearm approaches the
run-out grooves, When the stylus reaches these
grooves, the glider is brought into featherlight con-
tact with the free-suspension trip switch, and the
automatic trip immediately takes over, Less than
0.4 gram force is sufficient to activate the switch,
“At-Home” Demonstration of Tonearm
Balance, Tracking and Low Bearing Friction
Among the final “torture” tests that each Dual
1019 must poss al the factory ore some which you
can easily duplicate at home. We believe that you
will find them both interesting and impressive
demonstrations of the precision tracking possible
with this truly remarkable inatrament.
Tripping at /:s Gram
If you have a high compliance cartridge and a
new record with aemooth run-out grooves you can
witness the phenomenon of & toncarm actually
Inpping at Va gram! Just set the stylos force scale
accordingly, and place the tonearm on the rec-
ord near the center, just outside the run-oul groove,
Then press the slide awitch to MANUAL and watch
the cfortless tripping performance,
Tripping at “Zero”
Try this also, With the stylus force scale set al 0,
allow the tonearm to float over the record in mid-
air, Push to MANUAL to rotate the record, then blow
genily on the tonearm from the side , . , just enough
to case it toward the center. (Fig. 9). As your breath
Hone moves the toncarm, if will again trip and then
float gently back, (Because it is set at O tracking
force, the tonearm wil) nol descend to its resting
post. So be sure to restore the normal tracking
force for your cartridge.)
Tonearm Balance
With a 12° 33-rpm record on the platter and the
stylus force set of | gram, prop the Dual wp aos
shown in Fig. 10° af any angle up to 60°, When
you push to sTaat, the tonearm will index and
(rack flawlessly, os o demonstration of its perfect
balance in all planes, (While tracking, the Dual
can be tied even further to alnvost 90°.)
Vertical and Horizontal Movement
Now, without tilting the Dial itself, place a cigi-
rette of short pencil) between the record and
platter to simulate the effect of a badly warped
record, Again, the tonearm will track flawlessly,
this time ad a demonstration of the low friction in
the vertical pivot
Finally, for the “piece de resistance,” test for low
friction in the horizontal pivot. To do this, place
a large-hole 7° record on the platter, but off center.
(Fig. 11) Place the tonearm on the lead-in groove
ond push to Manwal, The aight of the tonearm
awoaying back and forth while tracking is indeed
aiartling.
*You con actually 1h the Dual from any side cacepil the
right, ab the free action of the trip awiich would then cmise
i ie he achive ot abe PO" Git, Needbens ts poy, thee [al
reguirts ao leweling.