Vintage Test Instruments
My vintage test instrument collection is predominatly HP, with a few Tektronix and others mixed in. They are mostly higher end instruments, with a bend on RF/microwave. When I get the instruments, off eBay or lab rejects, they usually don't work. Or if they do, they fail shortly thereafter. Not to worry, we always get them to work. The repairs are chronicled on the CuriousMarc YouTube channel. Here you will find more info and links supplementing the videos.
This section is under construction and most projects don't link to anything yet. Please be patient as we construct the site.
Wide Bandwidth Oscilloscope Repair
This is the 'scope and repair that began the collection. This is a legendary and famously expensive instrument, and the first scope capable of 10 GHz bandwidth that I ever saw and used early in my career at Bell Labs.
HP 8568B and HP8444A-Opt 59
1.5GHz RF Spectrum Analyzer
My HP 8568 has the dreaded YTO unlocked error.
1.3GHz Tracking Generator for the HP 8568
This is the special version of the HP 8444A that works as a tracking generator for the HP 8568.
10KHz-1280 MHz Synthesized Signal Generator
My 8662A, the fabled gold standard of synthesized low-noice oscillator, is in trouble. Let's fix it.
A tracking generator for the HP 8566B
100Hz - 2.5GHz tracker
I hack an HP 83522A plug in to transform it into a low-band tracker for the HP 8566B up to 2.5 GHz.
HP-IB Bus Analyzer
An early, specialized logic analyzer for HP-IB bus sniffing and debug. It allowed me to reverse engineer my HP 7970E tape drive complicated sequence of commands.
With this one, you literally see the ones and zeroes! Made to generate a vector display on an X-Y oscilloscope, this is one of the very first logic analyzers from HP. With about zero memory, but more features than you'd think.
1 kHZ - 150 MHz Amplifier
This one first appeared in the 1965 catalog, and was still there in the 1981 edition! A very oldie but still goodie. We recently used it to make ferrite core memory tests.
Bought for cheap at an auction, this very useful instrument sure did not work at first.
A classic instrument, suffering from a classic failure.
Data IO 29B
It was the king of ROM programming at the time. Mine (from eBay) needs a lot of TLC.