SERIAL NUMBER tJlul\fijt:o STEREO 35 POWER AMPLIFIER This number must be mentioned in all communications concerning this equipment. INSTRUCTIONS FOR ASSEMBLY OPERATION .... ) , .. t~·/ I ':;:'\..· ~--~--- ~--' Price $1.00 PATENTED 929014 .J NyI\Ii1ca ;I\lC_ 3060 JeHersan St., Phila"~I~hia, , -~ Pa. 19121 U.S.A.
\ CONTENTS 3 General Wiring Practice •...••.. :. • • '" 4 I Mechanical Assembly; ....: .. ". . . • •. 5 Wiring Instructions 6 240·Yolt Transformers " . .. Installation ~ \ .J 9 9 In Case of Trouble . . . . . . . . . . . . . .. 10 Parts list ".. 11 Schematic Diagram Back Cover SPECIFICATIONS Power Output: Frequency Response: 35 watts continuous, 45 watts IHF Music Power (both channels) ± 1 db from 10 cps to 40,000 cps.
" INSTRUCTIONS FOR ASSEMBLY AND USE OF THE DYNAKIT STEREO 35 POWER AMPLIFIER DESCRIPTION The Stereo 35 is a dual power amplifier of deceptively simple appearance and circuitry. Behind its seemingly conventional design is an extremely sophisticated circuit configuration representing the most recent advances in power amplifier engineering and construction.
GENERAL WIRING PRACTICE Assembly of the Stereo 35 is exceptionally simple when compared to that of other kits. The circuit boards are supplied with all components mounted, and the remaining parts arranged on the chassis in an open, uncluttered way that makes wiring quick and easy. The construction of the StNeo 35 should take no more than a few hours. When you unpack the kit, check the components against the parts list first.
MECHANICAL ASSEMBLY LEFT 3-SCREW TERMINAL STRIP GROMMET FUSE HOLDER RIGHT 3-SCREW TERMINAL STRIP e <6 ~ e GD Z-565 OUTPUT TRANSFORMER (LEFT) ~ V-2 6BQ5@ GD @ 7247 ® ® 0 @ Z-565 OUTPUT TRANSFORMER (RIGHT) PA-774 POWER TRANSFORMER 9 Pictorial Diagram # 1: CHECK PICTORIAL DIAGRAMS # 1 AND #3 BEFORE AND AFTER DOING EACH STEP. I ( ) Mount the two 3-screw terminal strips on the outside of the chassis in the cutouts provided, using #4 screws, nuts and lockwashers (the smallest size supplied).
WI.!UNG INSTRUCTIONS'. ' LEFT CIRCUIT BOARD ) ,n When cutting transformer leads to correct length, strip the insulation at the end of each lead to expose about 114" of wire. Tin the exposed end, by heating it with the soldering iron and melting bit of solder onto it; this wiI1 keep the end from fraying, and permits a more secure mechanical connection. Measure the length with a ruler, from the chassis to the end of the lead..while holding the lead straight out from and perpendicular to the" chassis.
5-LUG TERMINAL STRIP :~ RIGHT 3-SCREW TERMINAL STRIP Pictorial Diagram #2: Wiring of transformer leads. 15( ) Cut the black, orange and yellow leads of the LEFT output transformer to 3 112" long. Twist all three of these leads together, and connect the black lead to lug C of the LEFT 3-screw terminal strip. 16( Connect the orange lead to lug 8 of the LEFT 3-screw terminal strip (S). 17 ( Connect the yellow lead to lug 16 of the LEFT 3-screw terminal strip.
REFER TO PICTORIAL DIAGRAM ;:r3. 26 ( ) Connect one nd of the 6S00-ohm (bi ue. gray, red). 1-watt resistor to lug ;;2 (square symbol) of the filter capacitor. Connect the other end to lug #3 ( triangle symbol) of the capacitor. The resistor leads should be cut to permit mounting exactly as is shown in the diagram. 27( ) Connect one end of the 50-ohm, 5-watt resistor to lug # 1 (curved line symbol) of the filter capacitor. Connect the other end to lug :#I 2 (square symbol) of the capacitor (S).
'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,.
The St('rl'n :J;i may also hi' u~('d with an F ~I tUON without 01'('(1 for :l !In'ampliftrr, prnvidpd that tlw tunpr is equiPl)('d with a volume control and 5witchl'r1 a.c. outld, :md ha:; an output of :It 1(';\5t 1 volt. T!w loudsp('ak~'rs chosen may be of JllY iTl1]1('danc(~ or efficipncy, since thc' Stcn'o :~[) has sufficient pOWI'r reserv{' bc~yond that usually rl'quil'('d for home listening so that no lack of volume is likely to bl' oosNv('d, ('v('n with I'l~btivdy incfficil'nt spl'akers.
If hum and nol.", are present to :my unusual clE'!:;n,<".iir~t remove the input plugs from tlw St<'rC'o :3;;, and rcp!:lcC them with short-circuited input plugs I or t<~mp()rarily connect a jumper betwcn eyelets 1 ;md :2 on each circuit board). If the hum and noise become virtually inaudible, the amplifier is probably working properly, and the cause should be sought elsf~wh(~re in the system. Tf plainly audibll"' hum or noise p<'rsist.
LEFT @ @
RIGHT PICTORIAL DIAGRAW\ #3.
SCHEMATIC DIAGRAM LEFT CHANNEL PC-13 ~_--4>--Y:..;;E.::..l --I'll BlK '-----?-~~ 16 n COM Voltages .hown measured from tube pin to chossis with YTYM. VOLTAGE V-2 V-3 Olii I 215 0" 112 2 0 0 116 13.5 13.5 3 -, --, 4 485 TO 9 6.3AC 6.3AC 5 6.3AC ---l ---l Ollf O· 6 112 7 370 370 0 0)\0- 0" 8 .85 9 375 375 PIN V-I 10 CHART V-4 V-5 O· 230 112 0 116 13.5 --, 465 TO 9 6.3AC 6.3AC V-6 0* 0 13.5 --, 63AC --.
V6 5 RIGHT CHAN N E L PC-13 • 1 V5i V4S! 3II .5 9 8RN/WH denotes eyelets VEL IG.Q OR 8D. COM - @ 0 ~ C5 1 G ~ 0 c: ~ ~~ @~ @4 @2 10 0 I ;-;, 6@ ~ C4 F ~~ @~ PARTS LIST FOR SCHEMATIC DIAGRAM Part. marked (,.) are mounted on circuit board PC·13 0 0 RESISTORS R I' 47K R 2' 470K R 3' 1.3K R 4' 150K R 5' 300K R 6' 27K R 7' 33K R S' 470K R g' 470K RIO' 17K Rll 6.
PARTS LIST 'OR S(Ht:MATIC DIAGRAM Put NC!, Tt T2 TJ 01 Dl PO'N&t Tuntlormer PA.,,4 Output rru:Jfolmer Z·!SS Oulout T1aolfor(JI!f Z·S6!. 464714 4S
SCHEMATIC DIAGRAM LEFT CHANNEl PC-13 r-_-t-Y:.::E.=..L-{B 16!l ~_-+..;,;OR4g 8!l I I I Voltage I Iho .... fI mea'uted r,o," I L Illbe pi., to ("'oui. witlol VrVM. PIN V-I I 2 3 215 112 116 ",'/ .. ----:.._- VOLTAGE CHART V-2 V-3 V-4 V-5 RED V-6 RII o 0 112 0 13.5 13.5 I 16 13.5 4 5 0 13.5 -, ---, 6.3AC 63AC ....J ...J 6 7 O*' 370 0* 370 8 9 375 375 TI RI2 + ILK C8B- 0.1 C8D + RI3 ~ ILK 2A SlO BlO 4 Ie> 13.
