Special Instructions - DYNACO Dynakit ST35 Instructions For Assembly And Operation Manual

INSTALLING THE STEREO 3S
Dynakit Stereo
;1;)
amplifiers
suppli(~cJ
with
POWN
trans-
former PB-02S can be
win~d
for lise with (·ithc-r 120- or
240-volt a.c. power sourcf's. in lhe
followin~ w;~y:
For
240-volt
operation.
( ) Connect the violet-and-whi te lead to lug ;:.) of the
i)-lug terminal strip.
Connect the black-and-white kitd to lug ==5 of the
;J-lug t0rmino.I strip (S).
Connect the bbck ll,acl to terminal B of the fusp holdN
(S).
Connect the viold lead to lug ;;:,t of Uw .J-lug terminal
strip.
Proceed with the wiring steps in the regular assembly
portion of this hookkt. hl'ginning with wiring step
#
3.
For 120-volf operation.
Begin with the group of scvC'n Ir'ads from thr pOWl'r
transfonm·r. all of which should come through
tb(~
hok
in the chassis farthest from the fust' holder.
('ol1lwl't
the black lead to tcrmin;)l B of the fus(' hold0l',
Connect the black-and-whitl' lcad to tr'rmina) B of tlw
fuse holder
(S;.
I ) COnJ1l'ct
the vio!rt
lead
to lug ;;:4 of the .j-lug tt'rminal
strip.
Connect the vioJt>t-and-whitl' lead to lug ;;:4 of the
5-lug terminnl strip.
Proceed with the wiring sters in th(' regubr ass('mhly
portion of this booklet, beginning with wiring step
:#
:1.
r1
VIOLET
VIOLE T
aWHITE
1
BLACK
, B WHITE
240-voll
FOR OPTIONAL
TRANSFORMERS
9LACK
VIOLET
a
WHITE
BLACK
BWHITE
~
VIOLET
120-volt
SPECIAL INSTRUCTIONS
120-240 VOLT POWER
8LAC~
In addition to the Stereo :l5, your complete stereo system
will includf> one or more signal sources I turntabll'. tUI1l'r,
tape transport) , a stereo preamplifier (unless included with
the signal source), and two loudspeakers.
Installation of the Stereo
:~5
is simrle. You will need
two shielded audio cables for the inputs (usually provided
with the preamplifier) and two lengths of two-conductor
wire with which to make the connections to the loudspeak-
ers. Ordinary lamp cord will do for the latter.
The Stereo 3,5 is d('signrd for use with stereo pn':llnpli-
fu'rs which have their own power supply, such as th(' Dyna
p AS-3. In addition to a high
II~vel
of performance, the
preamplifier should he capable of delivering a signal of
about L volt to drive the Stereo 3.') to its full output. '1'111'
Stereo 3:> a.c. lint' cord should he connected to a switched
auxiliary a.c. outlet on the preamplifier; in this way, it
.will be turned on and off automatically when the prf':llnpli-
fier is switched on and off. Since the Sterpo ;3;) contains its
own fuse, an outlet which is not fuspd may be used.
Be sure that all mounting screws ilnd nuts are tight.
Compare the wiring of ('Jch of the tube sockets to that
shown in thp pictorial diagram. All connections should
be seclll'ely soldNed, with enough space between con-
n(,etions to the tube pin lugs so that there is no chanc0
of an ::lccidental short-circuit.
i
Compare the wiring to each lug of thC' filter capacitor
with that shown on the diagram. Check carefully to see
that all connections are soldered, and that excess lead
IC'ngth has not caused any connection to short-circuit
to thf, cbassis. Count the wires going to each terminal
on diagram nnd amplifier.
\ UsC' special care in eXHmining all connections, to be sut'(,
that none of them are high enough to touch the bottom
platf' when it is installed. Chpck the ;:i-lug terminal
strip and filter capilcitor closely.
The tubes and fusc may now hI' installed. The sockd on
rach board which is supplied already mounted is for the
1247 tubl'. Each of the two sockets installed and wired
during assembly receives one of the 6BQi) tubes. 1M POR-
TANT: When inserting the tubes in their sockets for the
first tim(', the socket should be supported from below to
avoid strain on the circuit bOilrd, due to the tight fit of new
sockets. The amplifier a.c. cord should NOT be plugged
into a wall outlet until aftcr the tubes arc installed, and
the cover and bottom plate an' securely in place.
The cov('r and bottom plate arc aUached at the same
tirm~.
by
s(~tting
the amplifil'r chassis on the bottom plate,
which fits inside the chassis. and then lowering the cow'!'
onto the chassis. The thrcE' pieces are fastelwd together by
four sheet mdal scr('ws through the sides of the chassis. The
four rubhE'r feet arc installed by pressing them into the
corn('r ho!<'s of thl' bottom pIntC'. Tlw cover should be used
w!wne-vpr tl1<' :lInplifkr is
o]J('ratl~d
where it may be touched
accidentally; not only do the tubes bl,~CorIW quitt> hot in
operation. but some points on the circuit board carry a
voltage which, while not lethal, can be quite uncornfortahl('
if touched while the amplifilT is on.
PLACES TO DOUBLE-CHECK AFTER WIRING
,J;;
i
'onnl'ct
one end
of ~l
11 I"
wire lo pin
:.::-9
of
V<3 on
the LEFT circuit hO:lrd ' . S:, COIllWct thf' ot!wr end
to eyelet
==
II,S) ,
,J'!' ,
COnIH'ct
011('
('nd of a 1" bare wire to pin
=:2
of V-:3
on the' LEFT circlIit hoard (S), Connl'ct the otl1('r
I'nd to f'yP1ct
;;L!)
l S) .
;),'i,
COnIwct
011('
('oc1 of allother I" bal'l' wire to pin
:;::2
of V
-~
on II\(' LEFT circuit hoard : S). Connect the
other end to eyeld
#8
IS).
;)6,. ) f:onnect one end of
:J
1" wire to thl' long- lug of the
LEFT input socket IS,. Conncct the other ('ncl to
('yf'let ;; L . . S ".
f)i
('onm'd onl' elld of ;\ 11/~" wire to the short lug of
tl1(' LEFT input sockel
is'.
Connect the other end
to eyelet :.::-:2
IS).
.j'" Ins!'rt the line cord through the rubber grommd
lnountl'd on
thl~
chassiii, und push it through far
('nough to tie a kno/. about ;)" from the pnd. Tie thp
knot. Thl'n, >,;eparate 01(' two conductors of the lint·
cord for :.lbOllt 4". Cut
11i~"
from onc of them, and
stri
p
and tin lhe ('nds of both.
;-)!l !
CO!Hwct
th,' long-er of the two
lirH~
cord conductors
to lug =::-4 of th" i)-lug- terminal strip
I
S I. Connect
th(, otlwr conductor to lug A of th<' fuse holdpr (S).
This completes the
wirin~
of the Stereo
3f).
9