Dr. Holden’s PHACO FLUIDICS BOOK moved from previous website WORLDMICROPHACO.COM
THE AMAZING SANYO 8P2 TELEVISION FROM 1962
DIAGNOSTIC TOOL FOR THE SOL-20 KEYBOARD
RESTORATION OF THE SONY MICRO TV 5-303E
REPLACEMENT DC POWER PLUG FOR THE ZC-1 RADIO
SOUPING UP THE ZC-1 AUDIO OUTPUT STAGE
RESTORATION OF THE NATIONAL 1-10A RADIO
REPLICA MM5204 PERSONALITY MODULE FOR SOL-20 COMPUTER
POWER SUPPLY FOR NATIONAL 1-10A RADIO
THE SOL-20 COMPUTER S-100 LIGHT PEN PROJECT
5.25″ DUAL FLOPPY DISK DRIVES FOR A CP/M COMPUTER
THE WORLD’S FIRST COMPUTER GRAPHICS CARDS-THE ALT256 and ALT-512
THE AMBER COMPUTER VDU PROJECT
REPAIRING THROUGH HOLE PCBS WITH MINIATURE EYELETS
SOL-20 COMPUTER POWER ON LOCKUP PROBLEM WITH THREE 16KRA RAM CARDS.
LOST IN SPACE. IBM-5155 ASYNC CARD REPAIR.
THE SOL-20 COMPUTER CASSETTE TAPE INTERFACE
VOTRAX TYPE ‘N TALK MEETS THE HERO Jr. ROBOT
HISTORICAL LUCAS ALTERNATOR REGULATOR AND IGNITION DESIGNS.
PROCESSOR TECHNOLOGY 16KRA BOARDS & DELAY LINES.
THE BARLOW WADLEY XCR-30 RADIO.
AUTO DETECTING 405 LINE VIDEO MONITOR
THE ZENITH ROYAL 500 TRANSISTOR RADIO
ORAC: THE TRANSPARENT PAPER WEIGHT TV.
THE 1987 VINTAGE CONRAC AVIONICS VIDEO MONITOR
THE EDDYSTONE 640 RADIO AND A MEDIUM WAVE UP CONVERTER.
HICKOK TV-10 CALIBRATION AND A SEMICONDUCTOR CALIBRATION TOOL.
ELECTROLYTIC CAPACITOR FAILURE TEK TM POWER UNIT & SELF CRACKING RESISTORS TELEQUIPMENT SCOPE
THE ADMIRAL 19A11S TELEVISION SET AND THE CLEVEREST DEFLECTION CIRCUIT EVER CREATED.
THE 120V 400Hz THREE PHASE POWER SUPPLY FOR AVIONICS INSTRUMENT TESTING.
PRACTICAL TELEVISION’S ARGUS and “MY ARGUS”
RF MODULATORS FOR 405 LINE TELEVISION.
INCREASING THE UTILITY OF THE IBM5153 COLOR MONITOR TO DISPLAY 16 COLOR EGA IMAGES
USING AN IBM EGA CARD IN THE IBM 5155 COMPUTER AND RUNNING THE AMBER MONITOR
MINI ARCADE PONG “SIX BUGS SAFE”
GRETSCH GUITAR JET FIREBIRD & RALLY MODEL TREBLE BOOST AMPLIFIER MYSTERY.
THE UX-171-A CLASS AB1 PUSH PULL POWER AMPLIFIER
THE BUBBLES THAT CRIPPLED A KING
THE 1972 DIGEEC NIXIE CLOCK FROM EUROPEAN ELECTRONIC COUNTING (EEC).
THE UP-DOWN 12-24Hr CMOS CLOCK
THE GREBE SYNCHROPHASE MU-1 RADIO.
RADIO GRID LEAK DETECTORS IN THE 1920’s.
TEKTRONIX OSCILLOSCOPES: VERTICAL AMPLIFIER CALIBRATION PRINCIPLES & THE 464 OSCILLOSCOPE.
TEKTRONIX 2465B MAIN BOARD INTERTRACK LEAKAGE PROBLEM
GAS TURBINE ENGINES.AVIATION AND ROCKET MOTOR EXCITERS
THE NZ MADE PACEMAKER TRANSPORTABLE TRANSISTOR RADIO
THE 1962 TUNG SOL EI-4 THYRATRON BASED CAPACITANCE DISCHARGE IGNITION FROM MOTION INC.
THE SONY GENDIS TR-72 TRANSISTOR RADIO
HERO Jr POWER SUPPLY PROTECTION & HERO Jr RADIO SYSTEMS.
HISTORICAL ELECTRONIC DYNAMO REGULATOR DESIGNS:
RESTORATION OF THE ANDREA KTE-5 AND THE MEISSNER 5 INCH 1939 TV SETS.
EVOLUTION OF THE ENERGY RECOVERY DIODE OR DAMPER DIODE.
A SELF EVIDENT SOLUTION TO THE RESISTOR CUBE QUESTION
RESTORATION OF THE RCA 621TS TELEVISION SET.
FITTING A 5FP4 CRT TO THE HMV904.
ATARI PONG THE MISSING CIRCUIT ANALYSIS-42 VECTORS & LAWN TENNIS.
A BUSH TV22 TELEVISION RESTORATION
WORLD’S ONLY ALL FETRON SUPERHET RADIO & THE OMEGA DEVICE
USING STANDARD PROBES WITH THE TEKTRONIX 222PS OSCILLOSCOPE & REPLACEMENT BATTERY SYSTEM.
INFANT BREATHING MONITORING – THE DYNAMIC CENTRE OF MASS INFANT BREATHING MONITOR.
RESTORATION OF A 1939 HMV904 TELEVISION SET.
THE ORIGINAL C1-MINI LATHE MOTOR CONTROLLER
The Static Tic Tac Toe Computer
RESTORING THE EARLY COMMODORE PET VDU
DRAM MEMORY TEST SYSTEM FOR the 2001 DYNAMIC PET COMPUTER
THE TAYLOR-WILSON PET COMPUTER UNIVERSAL PRINTER INTERFACE
THE ASTOR DIAMOND DOT CAR RADIO RESTORATION
THE HEATHKIT GW-21A TRANCEIVERS
The MC1468705G2 MCU Rom Data Extraction Project