Канал: iz8dwf

Cinematronics arcade italian clones repair. Pt. 5: The big failure event

Cinematronics arcade italian clones repair. Pt. 5: The big failure event

Cinematronics arcade italian clones repair. Pt. 4: Ripoff clone resurrection and death.

Cinematronics arcade italian clones repair. Pt. 4: Ripoff clone resurrection and death.

Solartron/Enertec 7151 multimeter repair pt. 2. Calibration failed.

Solartron/Enertec 7151 multimeter repair pt. 2. Calibration failed.

Commodore SX64 "finger assisted" repair (an easy one).

Commodore SX64 "finger assisted" repair (an easy one).

(Re)-designing a CBM IEEE-488 floppy disk drive. Pt.1: Drive mechanism choices and testing.

(Re)-designing a CBM IEEE-488 floppy disk drive. Pt.1: Drive mechanism choices and testing.

Cinematronics arcade italian clones repair. Pt. 3: Skyfire lives again!

Cinematronics arcade italian clones repair. Pt. 3: Skyfire lives again!

Cinematronics arcade clones repair. Pt.2: "Vectorbeam eliminator"

Cinematronics arcade clones repair. Pt.2: "Vectorbeam eliminator"

Cinematronics arcade italian clones repair. Pt.1: "smoke on the power"

Cinematronics arcade italian clones repair. Pt.1: "smoke on the power"

HP-8640B repair. It needs a broken lamp!

HP-8640B repair. It needs a broken lamp!

Atari Asteroids Arcade PCB repair. Only (almost) PCB issues.

Atari Asteroids Arcade PCB repair. Only (almost) PCB issues.

Commodore 8050 repair by email. Unusually easy one.

Commodore 8050 repair by email. Unusually easy one.

Zaccaria Space Fortress arcade. Not much effort needed.

Zaccaria Space Fortress arcade. Not much effort needed.

Yaesu FT-817 hamradio transceiver repair. Fuse and "fused" trace.

Yaesu FT-817 hamradio transceiver repair. Fuse and "fused" trace.

Zaccaria Space Pirate arcade repair. Mistakes happen!

Zaccaria Space Pirate arcade repair. Mistakes happen!

Making a MOS7501/8501 replacement adapter with a 6502 (Plus C16 upgrades). Part 2.

Making a MOS7501/8501 replacement adapter with a 6502 (Plus C16 upgrades). Part 2.

Icom IC-E90 amateur radio transceiver TX fault repair. As lucky as it can get.

Icom IC-E90 amateur radio transceiver TX fault repair. As lucky as it can get.

Zaccaria Galaxia arcade repair #4. Last PCB but still not easy.

Zaccaria Galaxia arcade repair #4. Last PCB but still not easy.

TPV effect on a Schottky diode

TPV effect on a Schottky diode

Zaccaria Galaxia arcade repair #3. Did this PCB ever work?.

Zaccaria Galaxia arcade repair #3. Did this PCB ever work?.

Rebuilding my Commodore PET 2001

Rebuilding my Commodore PET 2001

PET 2001's tape deck head azimuth alignment. A quick HOWTO.

PET 2001's tape deck head azimuth alignment. A quick HOWTO.

Zaccaria Galaxia arcade repair #2. I decided I needed a diagnostic ROM.

Zaccaria Galaxia arcade repair #2. I decided I needed a diagnostic ROM.

Zaccaria Galaxia arcade repair #1. It failed as I was fixing it.

Zaccaria Galaxia arcade repair #1. It failed as I was fixing it.

Zaccaria Astro Wars arcade repair. An unusual arcade pcb..

Zaccaria Astro Wars arcade repair. An unusual arcade pcb..

The DEC VT05 computer terminal pt. 1. A short introduction

The DEC VT05 computer terminal pt. 1. A short introduction

Missile Command (bootleg) arcade repair #2: a current tracer's job!

Missile Command (bootleg) arcade repair #2: a current tracer's job!

Missile Command (bootleg) arcade repair #1: a bad troubleshooting case.

Missile Command (bootleg) arcade repair #1: a bad troubleshooting case.

Solartron/Enertec 7151 multimeter repair pt. 1. Scrap or repair?

Solartron/Enertec 7151 multimeter repair pt. 1. Scrap or repair?

Reverse-engineering and testing an old arcade power supply

Reverse-engineering and testing an old arcade power supply

Galaga (gallag bootleg) arcade repair: The "Fujitsu TTL disease".

Galaga (gallag bootleg) arcade repair: The "Fujitsu TTL disease".

Galaga (gallag bootleg) arcade repair: debugging CUPL for a replacement daughterboard.

Galaga (gallag bootleg) arcade repair: debugging CUPL for a replacement daughterboard.

Apple IIgs battery leak damage. The not so easy repair

Apple IIgs battery leak damage. The not so easy repair

Making a vector monitor Pt. 5: cathode driver & spot killer plus final tuning.

Making a vector monitor Pt. 5: cathode driver & spot killer plus final tuning.

Home made 11" CRT vector monitor. "Almost there".

Home made 11" CRT vector monitor. "Almost there".

Hantarex arcade vector monitor (2x) repair. The bad and the good.

Hantarex arcade vector monitor (2x) repair. The bad and the good.

Apple IIgs disk interface issue. Substituting the IWM with a Macintosh one.

Apple IIgs disk interface issue. Substituting the IWM with a Macintosh one.

Apple IIgs "lucky" repair. Let's find a bad logic IC.

Apple IIgs "lucky" repair. Let's find a bad logic IC.

Amateur radio transceiver Kenwood TS-180S repair pt. 2 PLL troubleshooting and fixes.

Amateur radio transceiver Kenwood TS-180S repair pt. 2 PLL troubleshooting and fixes.

The longest Commodore PET 4032 repair ever, pt.2

The longest Commodore PET 4032 repair ever, pt.2

The longest Commodore PET 4032 repair ever, pt.1

The longest Commodore PET 4032 repair ever, pt.1

Amateur radio transceiver Kenwood TS-180S repair pt. 1 Voltage regulator issues.

Amateur radio transceiver Kenwood TS-180S repair pt. 1 Voltage regulator issues.

Commodore PET 8032 repair. ROM/RAM/IO and more faults fixed!

Commodore PET 8032 repair. ROM/RAM/IO and more faults fixed!

Commodore PET 8032-SK repair. Making a new "old school" troubleshooting tool.

Commodore PET 8032-SK repair. Making a new "old school" troubleshooting tool.

IZ8DWF gets mail #3! SIDs are coming! Lots of chips and how to test quartz crystals

IZ8DWF gets mail #3! SIDs are coming! Lots of chips and how to test quartz crystals

Atari Asteroids Arcade PCB repair (#2 board). Bad DAC and early revision's sound fault.

Atari Asteroids Arcade PCB repair (#2 board). Bad DAC and early revision's sound fault.

Atari Asteroids game PCB repair (#1 board): lift that reset! 6502 aren't made equal?

Atari Asteroids game PCB repair (#1 board): lift that reset! 6502 aren't made equal?

IZ8DWF gets mail #2! C64 PLA and how to quickly check a rebadged 6502.

IZ8DWF gets mail #2! C64 PLA and how to quickly check a rebadged 6502.

Atari Asteroids Arcade: making a power supply and audio amplifier for the game board.

Atari Asteroids Arcade: making a power supply and audio amplifier for the game board.

Making a vector monitor Pt. 4: Deflection yoke and driver issues.

Making a vector monitor Pt. 4: Deflection yoke and driver issues.

Making a vector monitor Pt. 3: The complete power supply and the first deflection tests.

Making a vector monitor Pt. 3: The complete power supply and the first deflection tests.

Making a vector monitor Pt. 2: different options on using "flyback" transformers.

Making a vector monitor Pt. 2: different options on using "flyback" transformers.

"Modern" electronics repair: fixing an LCD monitor's power supply.

"Modern" electronics repair: fixing an LCD monitor's power supply.

Fixing the 9" PET's monitors turn-off spot (With Adrian Digital Basement)

Fixing the 9" PET's monitors turn-off spot (With Adrian Digital Basement)

Commodore 64 "many faults" repair. Was it an auction scam?

Commodore 64 "many faults" repair. Was it an auction scam?

IZ8DWF gets mail! MOS8701 replacement and key test fixture from Hey Birt!

IZ8DWF gets mail! MOS8701 replacement and key test fixture from Hey Birt!

Dead Commodore 16. Making a MOS7501/8501 replacement adapter with a 6502. Part 1.

Dead Commodore 16. Making a MOS7501/8501 replacement adapter with a 6502. Part 1.

Restoring a C64 PCB 326295 Rev A. The first C64 PCB revision.

Restoring a C64 PCB 326295 Rev A. The first C64 PCB revision.

The 82S100 PLA and its Soviet clone. Let's make a NOS C64 PLA.

The 82S100 PLA and its Soviet clone. Let's make a NOS C64 PLA.

CBM PET 4032 (2001N) display logic repair. Remotely!

CBM PET 4032 (2001N) display logic repair. Remotely!

The Data I/O 2900 device programmer. Introduction and (easy) repair.

The Data I/O 2900 device programmer. Introduction and (easy) repair.

Making a vector monitor for Atari Asteroids arcade. pt.1: Theory

Making a vector monitor for Atari Asteroids arcade. pt.1: Theory

Atari Asteroids arcade 2xPCB repair pt.1 - Inspection and previous repair's damages

Atari Asteroids arcade 2xPCB repair pt.1 - Inspection and previous repair's damages

8 bit troubleshooting tools: The NOP generator

8 bit troubleshooting tools: The NOP generator

Commodore 1540/1541 Long Board (long!) repair.

Commodore 1540/1541 Long Board (long!) repair.

CBM PET 4032 (2001N) video fault repair.

CBM PET 4032 (2001N) video fault repair.

Gallag arcade (Galaga) #3. Final repair (with lots of Z80 code!)

Gallag arcade (Galaga) #3. Final repair (with lots of Z80 code!)

Gallag arcade (Galaga bootleg) #2 : Reverse engineering

Gallag arcade (Galaga bootleg) #2 : Reverse engineering

Apple Disk II interface card repair. Restore broken IC pins.

Apple Disk II interface card repair. Restore broken IC pins.

A "new" 16k Language Card for my Apple II europlus

A "new" 16k Language Card for my Apple II europlus

CBM PET 4032 (Universal Board) repair. Finding the only one bad chip!

CBM PET 4032 (Universal Board) repair. Finding the only one bad chip!

Apple II europlus restoration and repair.

Apple II europlus restoration and repair.

Servicing Apple ][ and IIe power supplies: change the RIFA capacitors!

Servicing Apple ][ and IIe power supplies: change the RIFA capacitors!

CBM PET 4032 repair. Always check the power supply first!

CBM PET 4032 repair. Always check the power supply first!

Gallag bootleg (Galaga arcade) PCB repair pt. 1

Gallag bootleg (Galaga arcade) PCB repair pt. 1

Quick repair of a Commodore 64 with a PLA fault

Quick repair of a Commodore 64 with a PLA fault

Troubleshooting Commodore 64 RAM with piggybacking method

Troubleshooting Commodore 64 RAM with piggybacking method

Commodore 1541-C restoration. Transformer primary voltage and cosmetic issues

Commodore 1541-C restoration. Transformer primary voltage and cosmetic issues

Commodore PET 3032 restoration project

Commodore PET 3032 restoration project

CBM PET 2001 repair part 3: Checking power supply and CRT monitor

CBM PET 2001 repair part 3: Checking power supply and CRT monitor

Moore Reed TC 301 Acoustic Coupler Restoration & Test

Moore Reed TC 301 Acoustic Coupler Restoration & Test

Restoring the DCD AC.350.OM acoustic coupler pt. 3: RX test & going online!

Restoring the DCD AC.350.OM acoustic coupler pt. 3: RX test & going online!

Restoring the DCD AC.350.OM acoustic coupler pt. 2: Schematic & TX test

Restoring the DCD AC.350.OM acoustic coupler pt. 2: Schematic & TX test

Restoring the DCD AC.350.OM acoustic coupler pt. 1: mechanical problems & component testing

Restoring the DCD AC.350.OM acoustic coupler pt. 1: mechanical problems & component testing

Acoustic Modems: recreating a small analog phone network at home!

Acoustic Modems: recreating a small analog phone network at home!

CBM 3040 (4040) disk drive repair: spindle speed out of control

CBM 3040 (4040) disk drive repair: spindle speed out of control

CBM PET 2001 repair part 2: Datassette, keyboard, more MOS chips dying

CBM PET 2001 repair part 2: Datassette, keyboard, more MOS chips dying

CBM PET 2001 repair part 1: Cleaning. 5V regulators. 6550 and 6540

CBM PET 2001 repair part 1: Cleaning. 5V regulators. 6550 and 6540

2 x Commodore 1541 repair. Low quality sockets and MOS logic failing.

2 x Commodore 1541 repair. Low quality sockets and MOS logic failing.

Commodore 1541-II repair. Device not present error.

Commodore 1541-II repair. Device not present error.

Commodore 1571 disk drive repair pt. 2: Replacing the R/W heads

Commodore 1571 disk drive repair pt. 2: Replacing the R/W heads

Commodore 1571 floppy disk drive repair. Bad 6502.

Commodore 1571 floppy disk drive repair. Bad 6502.

Commodore 1571 repair pt. 1: track-0 sensor failure and bad heads

Commodore 1571 repair pt. 1: track-0 sensor failure and bad heads

Commodore 1541-II repair. Power supply, IEC bus, write protect sensor.

Commodore 1541-II repair. Power supply, IEC bus, write protect sensor.

Commodore VIC-1541 repair. Stuck serial (IEC) bus.

Commodore VIC-1541 repair. Stuck serial (IEC) bus.

Commodore PET RAM/ROM replacement board, yet another one!

Commodore PET RAM/ROM replacement board, yet another one!

Commodore PET 2001 repair. RAM/ROM daughterboard comes to rescue.

Commodore PET 2001 repair. RAM/ROM daughterboard comes to rescue.

Commodore 1541 disk drive failed repair attempt: R/W head damaged.

Commodore 1541 disk drive failed repair attempt: R/W head damaged.

Commodore 1541 repair: shorted +5V supply

Commodore 1541 repair: shorted +5V supply

Commodore 64 repair: a power related black screen and dead keyboard CIA

Commodore 64 repair: a power related black screen and dead keyboard CIA

Commodore PET 2001 repair: dealing with MOS 6550/6540.

Commodore PET 2001 repair: dealing with MOS 6550/6540.

Commodore C64 repair: PLA-induced "black screen" and a bad RAM bit

Commodore C64 repair: PLA-induced "black screen" and a bad RAM bit

CBM PET 2001 monitor video board repair (easy)

CBM PET 2001 monitor video board repair (easy)

Commodore 128D (1571) disk drive repair (plus other minor faults)

Commodore 128D (1571) disk drive repair (plus other minor faults)

Commodore keyboard testing/cleaning mini-howto

Commodore keyboard testing/cleaning mini-howto

Commodore C-128 repair. Color RAM problem

Commodore C-128 repair. Color RAM problem

Commodore PET 4032 (2001N-32) easy repair. Bad ROM, bad VIA 6522

Commodore PET 4032 (2001N-32) easy repair. Bad ROM, bad VIA 6522

Commodore PET 3032 (2001N) video circuit repair

Commodore PET 3032 (2001N) video circuit repair

Commodore Amiga 600 recapping

Commodore Amiga 600 recapping

C64 (C64C) repair. Cooling a freezing CPU :)

C64 (C64C) repair. Cooling a freezing CPU :)

MOS 8701 modern replacement

MOS 8701 modern replacement

2 x C64 repair. One easy black screen case and a wrong approach

2 x C64 repair. One easy black screen case and a wrong approach

1979 Commodore PET 3032 (2001N-32) electronic repair

1979 Commodore PET 3032 (2001N-32) electronic repair

C64 (C64C) CIA#1 repair (keyboard/joystick faults)

C64 (C64C) CIA#1 repair (keyboard/joystick faults)

Commodore C64/VIC-20 power supply repair/upgrade

Commodore C64/VIC-20 power supply repair/upgrade

Commodore SX-64 (1541) disk drive belt fix

Commodore SX-64 (1541) disk drive belt fix

From the project to the gadget: making a small PCB.

From the project to the gadget: making a small PCB.

C64 repair. MOS-8701, DRAM and a black screen.

C64 repair. MOS-8701, DRAM and a black screen.

Commodore SX-64 Executive repair. Yet another black screen.

Commodore SX-64 Executive repair. Yet another black screen.

VIC-20 black screen repair. Bad Basic ROM

VIC-20 black screen repair. Bad Basic ROM

C64 (C64C) repair. CIA#2 and color RAM

C64 (C64C) repair. CIA#2 and color RAM

C64 repair - Don't fear the black screen!

C64 repair - Don't fear the black screen!

50 MHz CW Backscatter at IZ8DWF station (JM87AW)

50 MHz CW Backscatter at IZ8DWF station (JM87AW)

50 MHz CW QSO between CE2AWW and 3XY5M

50 MHz CW QSO between CE2AWW and 3XY5M

piezo pickup preamplifier sound recording

piezo pickup preamplifier sound recording

piezo contact pickup preamplifier test with bench sounds

piezo contact pickup preamplifier test with bench sounds

piezo contact pickup preamplifier first test

piezo contact pickup preamplifier first test

ZS6NK on 4m CW

ZS6NK on 4m CW

zs6jon 4m beacon

zs6jon 4m beacon

zs6wab ssb on 70 MHz (4m)

zs6wab ssb on 70 MHz (4m)

ZS6WAB Oct 23 2011 4m beacon

ZS6WAB Oct 23 2011 4m beacon