CuriousMarc : video
08h04 15  janvier
Apollo Ground Service Equipment Panel Prop
It’s time to build a home for my Apollo era switches and displays, so we make a functional GSE prop in the spirit of the great Apollo ground control panels. Whether we’ll use it in our projects or not remains to be seen... Avery Asset Tags: https: www.avery.com custom-printing labels calculator...
05h35 04  janvier
Is my vintage equipment trying to send me a message?
My vintage instruments are behaving oddly. Maybe that’s because we made it past 100,000 subs in the last week of 2020 Thanks to all that pressed the little subscribe button and support the channel Someone noted that videos about the equipment shown would be a good way to explore the channel, so...
05h53 17  décembre
Cobbling together a microfilm reader to explore a promising vintage microfiche find.
A microfilm find from a subscriber may have landed us a cross-reference list for old HP parts. Which would be a key find for vintage HP instruments repair We quickly hack out a microfiche scanner with an Andonstar electronic microscope to find out. Andonstar 207 (no affiliation with the company)...
07h13 29  novembre
Apollo Era Switch Gear from Master Specialties
Blame it on Fran Blanche, I got addicted to these wondrous lighted switches used in the Apollo Mission Control. Who would know that a lowly switch could be so interesting? Here we take a quick look at my growing collection of aptly named Twist-Lite switches and my Roto-Tellite indicator, and at...
06h32 27  novembre
HP 8447F 1.3 GHz Amplifier Quick Repair
This is the opposite of the previous repair-a-thon. A quick video (mostly made out of pictures) of my HP 8447F, a 0.1 to 1300 MHz wideband RF amp which got junked for what turned out to be a very silly failure. Mostly to document this nice instrument, as I could not find any other footage of it on...
06h26 22  novembre
HP 9825 calculator demo with real time clock module (and an Apollo switch )
The clock modules are repaired Time to don our fancy pants, turn on the HP 9825 calculator, plug in the repaired real time clock, and have fun with an Apollo mission control switch. Fancy pants are here: https: teespring.com magic-repair-pants?pid 1166&cid 104260 I’m told for a while (11 21 2020...
21h47 20  novembre
HP 98035 Clock Module Repair-A-Thon - Part 5: 100% success or bust
In this episode, we finally achieve 100% repair success. Of course, the last remaining problems are the toughest ones. Music credits: Festive dinner by Pony Music, used under license from Envato Market Our sponsor for PCBs: https: www.pcbway.com Support the team on Patreon: https: www.patreon...
05h16 02  novembre
HP 98035 Clock Module Repair-A-Thon - Part 4: getting the ghosts out of the interface boards
Votes from the previous episodes were a million to 1 that I should repair the remaining interface boards. I was planning to release this on Halloween, but I missed by a day as a whole bunch of very ghostly problems made the repairs more difficult than expected. Our sponsor for PCBs: https: www...
01h19 28  octobre
HP 98035 Clock Module Repair-A-Thon - Part 3: magic smoke escapes
In this marathon episode (no kidding, this part is really a repair-a-thon ), we attempt the repair some of the more difficult boards. And indeed, they are very difficult. Tough problems abound: magic smoke, erratic behaviors, half-functioning processors. Every time we make some progress, we...
06h45 20  octobre
HP 98035 Clock Module Repair-A-Thon - Part 2: Probing the inner workings of the boards
In part 2, we look at how the HP Nanoprocessor manipulates the TI clock chip, thanks to our very hairy test setup. Ken Shirriff HP Nanoprocessor articles: http: www.righto.com 2020 09 inside-hp-nanoprocessor-high-speed.html http: www.righto.com 2020 09 hp-nanoprocessor-part-ii-reverse.html ...
07h18 08  octobre
Inside failed vintage components: 1 MHz quartz crystal and early CMOS IC
We ended up with quite a few dead components in last episode’s repair-a-thon. Would a look inside reveal what they died from? Previous video: https: youtu.be CeXYZKg5jdo Quartz Crystal Oscillator Video: https: youtu.be ad8azNovsF8 Ken Shirriff’s blog: https: righto.com Our sponsor for PCBs...
00h34 05  octobre
HP 98035 Clock Module Repair-A-Thon - Part 1: 12 bad boards, how many can we save?
My previous video on TI clock chips was a (rewarding) detour on the road to repair my HP 98035 clock modules. Now that we have a good clock chip tester, and a few Chinese sourced clock chips that tested all good, can we repair the HP 98035s? Well, not as easily as it might seem. Also, Ken...
02h18 28  septembre
Playing with an early LED watch chip from Texas Instruments
In a previous episode, we decapped a Chinese sourced vintage LED watch chip. Surprisingly, it looked like a legit one. But it still did not work in my HP circuit. What about checking it by making a retro LED watch out of it? Head over to Patreon for the better, but demonetized version of this...
04h33 24  septembre
Friden Mechanical Calculator Carry Fix
We fix a subtle carry problem in our Friden STW-10 mechanical calculator, which gets us into explaining how it works. Our sponsor for PCBs: https: www.pcbway.com Support the team on Patreon: https: www.patreon.com curiousmarc Buy shirts on Teespring: https: teespring.com stores curiousmarcs...
03h37 22  septembre
The Friden STW-10 Calculator Plays The Friden March
I had the Friden calculator out for a photoshoot, so I took advantage of it to have it do the Friden March, and also 0 divided by 0 while I was at it. Our sponsor for PCBs: https: www.pcbway.com Support the team on Patreon: https: www.patreon.com curiousmarc Buy shirts on Teespring: https...