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Summary of Contents for 460BR

Page 1: ...HP Archive This vintage Hewlett Packard document was preserved and distributed by vvwvv hparchive com Please visit us on the web Scanned by on line curator Tony Gerbic For FREE Distribution Only ...

Page 2: ...460BR FAST PULSE AMPLIFIER OPERATING AND SERVICING MANUAL ...

Page 3: ... P E R A T I N G A N D S E R V I C I N G M A N U A L F O R MODEL 46OBR FAST PULSE AMPLIFIER Serial 1720 and Above 5 r J HEWLETT P A C U R D COMPANY 275 PAGE MILL ROAD PAL0 ALTO CALIFORNIA U S A 46OB004 3 ...

Page 4: ... open circuit unilateral pulse operation 10 duty cycle 200 ohms t 8 volts input required for 125 volts output Less than 6 db Approximately 016 psec Approximately 0 003 psec No appreciable overshoot 19 relay rack panel 5 1 4 high 6 3 4 deep Weight 12 lbs Shipping weight 18 lbs Accessories Available 46A l6APatch Cord 200 ohms 2 long 46A 16B Patch Cord 200 ohms 6 long 46A 95A Panel Jack F o r 200 ohm...

Page 5: ...d Terminals 3 2 4 Operation 5 Section I11 THEORY O F OPERATION 3 1 Distributed Amplifier 7 Section IV MAINTENANCE 4 1 Cover Removal 9 4 2 Tube Replacements 9 4 3 Power Supply 9 4 4 230 Volt Operation 10 4 5 Trouble Shooting 10 4 6 Connector 10 4 7 Test Procedure 12 Replacement of 200 ohm cable Section V TABLE O F REPLACEABLE PARTS 5 1 Table of Replaceable Parts 15 ...

Page 6: ...Figure 1 A Gaussian Response B Typical 460BR Amplifier Response Figure 2 A 0 01 psec Pulse Through 460BR Amplifier B 0 02 psec Pulse Through 3 Amplifiers in Cascade ...

Page 7: ... of 125 volts open circuit while negative pulses may be amplified to a maximum level of 16 volts open cir cuit A phase inversion occurs within the amplifier s o that a pos itive pulse applied to the input will be a negative pulse a t the out put However either upward o r downward deflections of the CRT is possible since either the upper o r lower deflection plate may be connected to the ground ter...

Page 8: ...round i e mounted in a relay rack and the high voltage output must be kept away from the input to avoid the possibility of feedback 2 3 CONTROLS AND TERMINALS ON This toggle switch controls the a c power supplied to the instru ment from the power line LINEAR PULSE This rotary switch selects the type of amplification desired FUSE The fuseholder located on the panel contains the power line fuse fied...

Page 9: ... W a v a 5 a a 460 B LINEAR PEAK VOLTS INPUT 460 B 4608 LINEAR PULSE Figure 3 Linearity Characteristics of 460BR Amplifier 25 V 2 H 25V 460 A _I 460B PULSE 460A 1 25V 2 5V 460 8 LINEAR 460 A i Figure 4 Cascading 460 Amplifiers 460B PULSE ...

Page 10: ...d a posi tive pulse of about 8 volts peak be supplied to the input In the PULSE position of the LINEAR PULSE switch the amplifier tubes a r e operated a t higher than normal supply voltages grid bias is increased to keep tube dissipation within ratings Under these conditions 1 8 volt input the rated tube dissipation is reached with a duty cycle of 10 Lower driving voltages will allow proportionall...

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Page 12: ...r e absorbed without reflection in the reverse plate line termination put voltage of a distributed amplifier is given by the relation Eo plate signal current and Zp is the plate line impedance Since the paths from the input through any The out nZp r i p where n is the number of tubes in the stage ip is the The number of tubes that can be used in a single stage is limited by grid loading which occu...

Page 13: ...the total rise time of any number of 460 Amplifiers in conjunction with any load may be found approximately by the following relation where n number of 460 Amplifiers t rise time of one 460 2 6XlO 9 sec C T total rise time total shunt capacitance on the output of the 460 in farads 8 ...

Page 14: ... standard E E I A JEDEC characteristics can be used as a replacement POWER SUPPLY The 460B power supply delivers two output voltages depending upon the setting of PULSE LINEAR switch S1 With S1 in the PULSE position selenium rectifiers CR 1 and CR 2 a r e connected in a voltage doubler circuit The dc output voltage between ground and the common junction of capacitor C22 filter choke L28 and fuse F...

Page 15: ...rted coils and by defective ter minating resistors or screen resistor s If Bt fuse F2 blows look for a B t short loss of bias or a shorted 5654 tube If a 5654 tube was responsible for the blown fuse check the appropriate screen resistor and resistor R1 for possible damage Resistor R1 is made up of five 980 ohms resistors connected in parallel Any one of these resistors could open without greatly a...

Page 16: ...o washers a r e included with the connector parts at the factory 134 washers supplied Purpose of additional washer is given in step9 Use all of the large 512 5 Slide rear plug body over shielding Hold r e a r plug body against end of outer insulation and cut off shielding 3 16 from beveled end of rear plug body 6 Fan shielding out and bend back over r e a r plug body Trim off any shield wire protr...

Page 17: ...EDURE Testing of the 46OB is a long tedious procedure and is not often needed However anyone with the necessary equipment for mak ing the several somewhat complex test set ups can complete the procedure will be required The following instruments o r their equivalent Signal Sources Models 212A 608C and 65OA Voltmeters Models 410B and 400D H L Oscilloscope Model 15OA Attenuators Models 355Aand 355B ...

Page 18: ...Figure 7 Top View of Model 460B Fast Pulse Amplifier Figure 8 Bottom View of Model 460B Fast Pulse Amplifier 13 ...

Page 19: ...f Q 0 14 ...

Page 20: ...e Table of Replaceable Parts will be listed on a Production Change sheet at the front of this manual When ordering parts from the factory always include the following information Instrument model number Serial number hp stock number of part Description of part ...

Page 21: ... vdcw Capacitor fixed electrolytic 4 0 p f 450 vdcw Capacitor fixed titanium dioxide 2 2 p p f lo 500 vdcw Rectifier metallic Fuse cartridge Q 8 amp for 115V operation slow blow Fuse cartridge 0 4 amp for 230V operation slow b low Fuse cartridge 1 4 amp regular type 3AG Lamp incandescent 6 8V 15 amp 47 Jack panel See R2 Coil Assembly Coil Assembly Coil Assembly Coil Assembly Reactor 6H 125 ma 240 ...

Page 22: ...ELLANEOUS Adapter type l1Nt1to 460 50 ohm termination Adapter for 410B to output of 460 no termination Adapter for 5XP CRT Adapter for Tektronix 511 Adapter type llN1l to 460 200 ohm termination Adapter type llN1 to 460 no termination Adapter 410A B a c probe to output of 460 200 ohm termination Adapter 200 ohm cable to 150A deflection plates Note for 150 s below serial 800 also order 150A 95P B N...

Page 23: ...Adapter 460B 95A Fuseholder Jack panel assembly for 200 ohm connector Knob PULSE LINEAR Patch cord 2 feet 200 ohm cable Patch cord 6 feet 200 ohm cable Pilot Lamp Assembly Retainer plate for panel jack HP HP HP T HP HP HP HP I P HP STOCE NO 46A 95B 46A 95E 150A 95P 140 16 46A 95A G 74N 46A 16A 46A 16B 145 2 46A 76A 1 2 1 1 See 1t List of Manufacturers Code Letters For Replaceable Parts Table Total...

Page 24: ...icago 111 Keasbey N J Sunnyvale Calif MANUFACTURERS CODE LETTER AK AL A M AN A 0 AP AQ AR AS AT AU AV A W AX AY AZ BA BC BD BE BF B G BH BI BJ BK BL BM BN BO BP BQ BR BS BT BU BV BW BX BY BZ CA CB CD CE CF C G C H C I CJ CK CL C M C N co CP CQ CR cs CT cu cv cw MANUFACTURER Hammerlund Mfg Co Inc Industrial Condenser Corp lnsuline Corp of America Jennings Radio Mfg Corp E F Johnson Co Lenz Electric...

Page 25: ...e to lampholder hp Stock No 145 25 M f r HP Change jewel pilot lamp to hp Stock No 145 23A M f r HP For instruments with Serials Prefixed 0030 the manual for Serial 1720 and above applies with a l l corrections l i s t e d above For instruments with Serials Prefixed 041 include the following changes in addition to those previously listed C5 19 Change to capacitor fixed ceramic Oluf 2 2 V 9 100 vdc...

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