__ 0 t L t
e jn 0 he bra_ing eytem in the vriouæ modeæ o3 oerajn
ig illustated in Fje and , oppoæieg e- of the di usion ave
note that 3n al3 mode, he greater akin force a3wayæ acs on the tr. iline
ntable. portion of hi increed raking force i exerted on he ledig
turntable 3hroug /e tae;! us the ape reain unde tenjon e sy-
tem is brought t a op
22 __ V3TC
oldbak enion is not a ontan in ny mode o operion' vie6
directly a unction o the orque o he trailig unle motor, nd inver
sely a funcjon o he eetive hub diame (j.e. hub diaee inldn
the te wound n te hub) of the riling ree1. a j, or given tru on
€he tilin oto he holdak tension will inceae he efective hu
diameter o the trailing eel decreae. educin the toru-e oa e trajline
ntble m' oor will derease he hldback esjon.
e holdbak enion resiors which djut e torque of th.e Take
up and ewind moor are 3aoryMse for A 1-/2 inch reel
3mler ?_ e. el re ued, he overll increse in the holdb ch tens3on
must be ompented fo in 0rder ta prevnt tape treth. i is done 1y
insein resistor 5 ìn seie with _he eup nd ejnd o&or hu
reducjn he o3ue o both moos hen e 9 eel ae ued. nerion -
is acompished by he eel ie ~wich, a ^ swich pl&ced aros the re-
sistoR 6O2.
3 Y o T
e operaion o he onrol irui relay in the vaio4 moDde can
.best be underoo.d by referring to the shematic o &e meanial sseb
onrol iruits, i, re 3, w1iile following th disio. Y: ll re- -
lay contacs in Rire 3 are drawn in their de-eergn2ed ositionæ, or on-
venience in ir ui eracing, referene to ray con in the follwin
derition re.precededby the leter (de-enrìzed3 or (energi2ed, o
indiate the oiion of he ontcts in he. ode e coniderd. ch re- -
lay equene desried below egin wi he te a dead 0p unl otrm
wjse speciid.
, 3 1 PJ,
en te lay b4tton (55) is ped, bo3 the lay elay (
and he Capan Jolenojd (K6) e èneRized ey ae held energized
hough elay contaGs E5a-l, 6-1, 2 , and the orlly cloed
3 - /13/!
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