Страница 1: ...ack through the self contained speaker or external speaker through use of the External Speaker Jack The Bell Model RT 204 has two tape speeds 7 2rt and 3 3 4t per second Using both tracks the recording time is as followed Size Reel 3 3 4r Speed 7 V 2 Speed 5 600 ft 7 1200 ft I hour 2 hours I 2 hour I hour The Bell Model RT 204 is designed to operate on 60 cycle 110 I20 volts AC supply only Manufac...
Страница 2: ...ldental are used relvind capstan arld taleup As a result elasure moving parts on the transport mechanism have been A remova ble cover plate otr the bottom of the held to a minimum cabinet allows eaay acceas to tubes motors and hum adjustment Two output jacks permit us of an external ModelRT 2o4is designedto operate on 80 cycle speaker or high fidelitir ampllfler system When the 110 120 volts AC su...
Страница 3: ...s and treble fre quencies To record from a phonograph equipped with a crystal cartridge connect the cartridge directly into the Radio input on the reeorder When using a magnetic cartridge connect a preamp between the cartridge and R adio input on the recorder After the proper connections are maderproceed with the recording as described under To Record From Microphone NOTE In order to obtain the be...
Страница 4: ...d Pressure Pad Adiustments To properly check rread azimuth alignment it is necessary to have a pre recorded 1 mil alighment tape which results in a 500 cycle per second signal when operated at 7 l 2 inches per second PIay alignment tape back through recorder with an AC VTVM connected across the speaker or 6Qload CAUTION Be sure recorder is in Play position to prevent erasure of alignment tape Thre...
Страница 5: ...screw 4 Hum Adjustments The hum balance control R3 on the amplifier should be adjusted first for minimum amplifier hum but wiII probably have to be slightly re adjusted for Iowest overall hum i e the hum voltage will help cancel hum induction into the head from the power transformer and motors Minimum hum voltage in playback is obtained by correctly polarizingthe power transformer and motors corre...
Страница 6: ...A PHOTOFACT EXPLODED VIE Y Howard 7 Sams Co lnc 1957 PAGE 6 FIGURE 4A EXPLODED VIEW OF PARTS ABOVE BASEPLATE ...
Страница 7: ... _L A PHOTOFACT EXPLODED VIEW Howard W Sams Co lnc 1957 I Rt tJ 4 tH e I r I ln FO F irz oe A PAGE 7 FIGURE 48 EXPLODED VIEW OF PARTS BELOW BASEPLATE ...
Страница 8: ...connected or missing If this springis disconnectedthere willbe notape drivewhen operating the recorder in the L 2 inch per second speed position Replace spring 6 5 Spring 61 disconnected or missing If this springis disconnectedthere will beno tape drive when PAGE 8 CLEANING carbon tetrachloride Use alcohol or water when cleaning the pressure roller never use carbon tetra chloride rvhen cleaning an...
Страница 9: ...0066P108 B 20066P72 12AX Pre Amp 6SN GT Bias Osc AF Amp 6V6GT Audio Output 6X5GT Rectifier Cap Elect 20 mfd 450 V Cap Elect 20 mfd 450 V Cap Elect 50 mfd 50 V Cap Elect 20 mfd 450 V Cap Elect 20 mfd 450 V Cap Elect 50 mfd 50 V Cap Molded Tub 1 mfd 200V Cap MoldedTub 0013 mfd 400 v Cap Ceramic Disc 101000 mmi 500 v Cap Molded Tub 05 mfd 400 V Cap Mica 4 0 mmf 500 V Cap MoldedTub 005 mfd 400 v Cap M...
Страница 10: ...AMPLIFIER FRONT VIEW 65N7GT I2AX7 6X5GT 6V AMPLIFIER REAR VIEW PAGE IO ...
Страница 11: ... z o o d ir ii r oaF oz Lcl e 5 Ir 2 o E Yr UF Ez o d L r11 l I I o F x l lr Ct qt e o F d O o F l J o c 9a LF z o l o rU LZ oo IF 2 vo E 2 o 6F e 3 UF e z o E L I z o F H FF z o E L F u z J o a 6 U EA E E a F C L z zl ol I a tNt e E E o N ifit 6q G E lF I o o ts f o ts t o r x e o E o 14 6 z u E IA a z Fct F E F 9p q or o c o l c o Y o o rn F o c c N o F q z v I F F 9 ts z N I 4e o EE ro a t t I ...
Страница 12: ...Retaining Clip Tape Guides Record Latch Ass y 6 32X1 4 Philtips Flat Hd Mach Screw Tinnerman Push Nut Shaft Key 6 used Stop Rewind Forward Key Actuator Play Record Key Actuator 3 38 39 40 4t 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 6l 62 63 64 65 66 67 68 69 0 7t 72 3 74 75 76 77 A 25268P2 B 20089P58 D 25340 B 25400P1 B 25400P2 A 25399 A 25394 A 25389 B 20089 P26 B 25386P1 A 25397P...
