Repair Work | DIY-Central.com

New V+ power supply for hp8902B pulse generator

by admin | Apr 13, 2020 | Power Supply, Repair Work | 0 |

This will be the new V+ regulated power supply for the HP Pulse Generator. Not the prettiest but...

Bad ua723 regulator chip

by ruel@fivefish.net | Apr 12, 2020 | Power Supply, Repair Work | 0 |

UA723 HOT!!!! The 723 chip on the (+) Regulator section is running super hot, almost 75C and...

TROUBLESHOOTING HP8012B PULSE GENERATOR

by admin | Apr 12, 2020 | Repair Work | 0 |

So I thought the unit was dead because LED light wasn’t even turning ON. My first suspect is...

Tektronix 2445A Repair – Part 2

by admin | Aug 12, 2015 | Oscilloscope, Repair Work | 0 |

UPDATE: The scope is 100% repair, unfortunately I didn’t update this blog while I was repairing the scope. So I’m going to look back at photos and videos I took and try to sum up my thoughts on what I did. So this is...

Tektronix 2445A: Repair/Restoration/Calibration

by admin | Jun 22, 2015 | Repair Work | 0 |

This is the Tektronix 2445A on my workbench, underside (belly) shown. This is the A1 board containing the attenuators for Ch1 and Ch2, and preamps for all 4 channels. I’m doing voltage and voltage ripple measurements, as...

Restoration & Repair of Tektronix 2445A

by admin | Jun 20, 2015 | Oscilloscope, Repair Work | 0 |

I have a 4-channel Tektronix 2445A I bought sometime around 2008(?) Basically, this scope is almost a 30-year old equipment, circa 1987 based on my research. I like this 2400 series scope compared to the Tek 2000 series it...