Barbouri's Electronics Projects
Restoring vintage electronics along with designing and building new circuits. One eye looking into the past, the other looking into the future.
Adding a new HP 34700 series module to the collection. This time it is the 34721B BCD interface plug-between module, which converts character serial data from the 34740A or 34750A Display Module to parallel character information for output to a printer.
Checking out a HP 3551A sold as “For parts or not working, will not power on”, that I actually purchased for parts.
My original intent on purchasing this unit was to salvage the knobs and connectors for repairing some of my other HP gear. I did manage to swap out four of the knobs before my curiosity got the better of me.
Cleanup and repair of a Hewlett Packard (HP) 8012B pulse generator purchased on Ebay as “Untested does not power on, sold as is”.
The 8012B was originally produced by the HP Gmbh Boeblingen Divison, Germany, but this later model was made in USA. It provides variable transition times down to 5 ns and the repetition rate can be adjusted from 1 Hz to 50 MHz.
After spending many hours working on my Hewlett Packard 5300 series measuring systems, I decided to remake my own version of the HP 10548A diagnostic service kit.
Cleaning up and photographing a Hewlett Packard 5301A 10 MHz counter plug-on module for the 5300 series modular measuring system.
Cleaning up and looking at a bunch of plug-on modules for my Hewlett Packard 5300B mainframe modules, after purchasing a new unit. It seems that I am starting to collect quite the range of modules for my HP 5300 systems since my original 5300B Measuring System back in 2017.
As mentioned in a previous post on the Hewlett Packard 34702A Multimeter module, I have been looking for a 34740A display module to pair with it. I was lucky to find a module that was in a good cosmetic condition and untested for a reasonable price.
When I purchased my HP 34750A Display module, it came with a somewhat beat-up 34702A Multimeter module. I was mainly interested in the display module to pair up with my existing HP 34703A module, but this is also an interesting module worthy of further exploration.
Continue reading “Hewlett Packard 34702A Multimeter Module”
Getting a HP 34750A display module for the HP 34703A DCV/DCA/Ohm Meter.
Continue reading “Hewlett Packard 34750A Display Module Repair”
Cleaning up and photographing a Hewlett Packard 34703A DCV/DCA/Ω Meter plugin section of a 3470 measurement system.
Continue reading “Hewlett Packard 34703A DCV/DCA/Ohm Meter”
Restoring a Heathkit IT-11 Capacitor Checker for use at my local Makerspace.
Continue reading “Heathkit IT-11 Capacitor Checker Refurbishment”Restoring a badly damaged late 1950’s analytical balance.
Designing and building a replacement display for the Power Designs, Inc. 6010D power supply, and other Power Designs D‑series supplies.
Continue reading “New display boards for Power Designs D‑Series power supplies”Restoring a Power Designs Inc. 6010D power supply
Refurbishing a General Radio Company 1531AB Strobotac unit built in 1975.
Continue reading “General Radio Co. 1531AB Strobotac Refurbishment”After finishing the IceTube clock version 1.31 build for myself, I was ready to work on the board design for some IceTube clocks as gifts. I could have used the existing V 1.31 boards, but I wanted to use an up to date design that incorporated all the hardware improvements over the past 10 years while still staying with a thru-hole design.
