Circuit Diagram

True_RMS_circuit_using_the_433_multiplier_divider_chip_and_an_AD741_op_amp

Published:2009/7/21 3:50:00 Author:Jessie

True RMS circuit using the 433 multiplier/divider chip and an AD741 op amp (courtesy Analog Devices, Inc.).   (View)

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Difference_of_the_squares_circuit_using_an_AD532_multiplier_divider

Published:2009/7/21 3:49:00 Author:Jessie

Difference of the squares circuit using an AD532 multiplier/divider. This chip is available as a 10-pin TO-100 or as a 14-pin DIP (courtesy Analog Devices, Inc.).   (View)

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120_WATT_D_C_D_C_CONVERTER

Published:2009/7/21 5:53:00 Author:Jessie

Circuit boosts 28 V d-c input to 400 V d-c with 85% efficiency, drawing 5 amp and operating at 10 kc.-120-Watt D-C/D-C Converter Operates From -55° to +125℃, Electronics, 36:2, p 15.   (View)

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20_watt_25_dB_16_to_30_MHz_SSB_linear_amplifiersupply_voltage_is_138_volts

Published:2009/7/21 5:53:00 Author:Jessie

20-watt 25 dB 1.6 to 30 MHz SSB linear amplifier.supply voltage is 13.8 volts (courtesy Motorola semiconductor Products Inc.).   (View)

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48_KV_OSCILLATOR_TYPE_CRT_SUPPLY

Published:2009/7/21 5:51:00 Author:Jessie

One of earliest circuits in which a-f sine-wave oscillator was used as power source. Filter capacitors are significantly smaller than in conventional line-transformer supplies.-NBS, Handbook Preferred Circuits Navy Aeronautical Electronic Equipment, Vol. 1, Electron Tube Circuits, 1963, p N14-2.   (View)

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Variable_speed_control_for_induction_motors

Published:2009/7/21 5:50:00 Author:Jessie

Variable speed control for induction motors (courtesy Motorola Semiconductor Pro-ducts Inc.).   (View)

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D_C_D_C_REGULATED_SUPPLY

Published:2009/7/21 5:50:00 Author:Jessie

Efficiency is 93% in converting 28 V d-c to 25 and 50 V d-c for telemetry transmitter. Regulation is achieved by storing energy in magnetic field of coil during half of each switching cycle created by transistors Q1 and Q2 after Q3 initiates switching cycle. SCR CR1 and diode CR5 control percentage of time switching transistors are on.-N. Downs and B. van Sutphin, Solid-State Transmitter Ready for UHF Telemetry, Electronics, 37:17, p 76-80.   (View)

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VARIABLE_REMOTE_POWER_SUPPLY

Published:2009/7/21 5:48:00 Author:Jessie

Permits varying output d-c voltage of scr power supply without changing a-c input voltage. Conduction time of scr's during each half-cycle determines average power delivered to load. Conduction time is controlled with pulse gating circuit that is synchronized with a-c line and is phase-variable. Provides maximum output of 60 amp at 20 V.-B. F. Gilbreath, Variable High Current Remote Power Supply, EEE, 10:12, p 27-28.   (View)

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High_low_AC_switch_for_light_dimming_or_small_motor_two_speed_control

Published:2009/7/21 5:46:00 Author:Jessie

High-low AC switch for light dimming or small motor two-speed control (courtesy General Electric Company).   (View)

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14_KV_AND_385_V_FOR_DARK_FACE_CRT

Published:2009/7/21 5:45:00 Author:Jessie

Uses two pentodes in parallel in a-f oscillator to provide sufficient power for final anode potential in oscillator-type supply.-NBS, Handbook Preferred Circuits Navy Aeronautical Electronic Equipment, Vol. 1, Electron Tube Circuits, 1963, p N14-3.   (View)

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Triac_full_wave_control_circuit_with_UJT_trigger_designed_for_a_900_watt_load

Published:2009/7/21 5:44:00 Author:Jessie

Triac full-wave control circuit with UJT trigger designed for a 900-watt load (courtesy Motorola Semiconductor Products Inc.).   (View)

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CMOS_MARKER

Published:2009/7/21 5:30:00 Author:Jessie

Crystal-controlled marker generator uses any crystal from 100 kHz to 4 MHz. Requires only one CD4009 hex inverter and two CD4015 shift registers. Switches give choice of even. number division ratios up to 256. Used for locating band edges or subbands and for calibrating receivers. Transistor AM beeper is simple clamp that gates RF on or off, to facilitate location of marker in crowded bands.-K.W. Robbins, All Band Frequency Marker, 73 Magazine, June 1975, p 88-90.   (View)

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TRIGGERED_THYRATRON_PULSER

Published:2009/7/21 5:02:00 Author:Jessie

Coaxial rail gun generates high-velocity copper plasma when triggered by series-connected button guns energized through transformer by thyratron pulser. Vaporized copper from buttons shorts main 15-mfd capacitor, vaporizing inner copper high-voltage electrode. –M. F. Wolff,Plasma Engineering-Part 1: Generating and Heating Plasma, Electronics, 34:28, p 47-53.   (View)

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RMS_Closed_loop_voltage_compensator

Published:2009/7/21 5:01:00 Author:Jessie

RMS Closed-loop voltage compensator (regulator).This circuit provides an output of 90 ±2volts RMS at 600 watts for aninput of 105 to 260 volts (courtesy Motorola Semiconductor Products Inc.).   (View)

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NAB_RECORD_PREAMPLIFIER

Published:2009/7/8 4:45:00 Author:May

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Color_TV_358_MHz_crystal_oscillator_using_a_dual_gate_MOSFET_

Published:2009/7/21 5:28:00 Author:Jessie

Color TV 3.58 MHz crystal oscillator using a dual-gate MOSFET (courtesy Texas Instruments Incorporated).   (View)

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Triac_relay_contact_protection_circuit

Published:2009/7/21 5:28:00 Author:Jessie

Triac relay-contact protection circuit (courtesy Motorola Semiconductor Products Inc.).   (View)

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70_80°C_THERMOMETER

Published:2009/7/8 4:44:00 Author:May

Uses National LM3911 IC having built-in temperature sensor.If no thermometer is available for calibration, set pot R7 to its midpoint. Article gives equations for calculating resistance values for other temperature and meter ranges. Applications indude monitoring of temperature in crystal oven. If permanenUy connected meter is not required, terminals can be provided for checking temperature with multimeter.-F. Schmidt, Precision Temperature Control for Crystal Ovens, Ham Radio, Feb. 1978, p 34-37.   (View)

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Direction_and_speed_control_for_series_wound_motors

Published:2009/7/21 5:27:00 Author:Jessie

Direction and speed control for series-wound motors (courtesy Motorola Semiconductor Products Inc.).   (View)

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TAPE_PLAYBACK_AMPLIFIER

Published:2009/7/8 4:44:00 Author:May

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