CuriousMarc
Computers

Apollo Comms Part 9: Mystery Up Data Box

January 17, 2022 CuriousMarc

Marcel rescued a mystery box from the scrapper. Says Up Data on it, we think it’s from the Apollo program. Can Master Ken figure out what it is? Apollo Comms Playlist: https://www.youtube.com/watch?v=v49ucdZcx9s&list=PL-_93BVApb58SXL-BCv4rVHL-8GuC2WGb Fran’s video on the edge-lit display: https://youtu.be/J2xAetY9O1E Links to doc: https://www.curiousmarc.com/space/apollo-s-band-communications https://virtualagc.github.io/virtualagc/QuestForInfo.html https://www.ibiblio.org/apollo/ Our sponsors – PCBWay: fast …

CuriousMarc
Computers

Bubble LED clock hack with 1970’s tech

January 8, 2022 CuriousMarc

We hack together a bubble LED clock, in homage of the Texas Instruments LED watch chip and the HP LED bubble displays from the 1970s. Music: Ether Disco by Kevin McLeod, https://incompetech.com/ Our sponsors – PCBWay: fast turn PCBs, https://www.pcbway.com – Keysight: test instruments: https://www.keysight.com – Samtec: connectors: https://www.samtec.com Support …

CuriousMarc
Computers

HP 8568B 1.5 GHz Spectrum Analyzer Repair

January 1, 2022 CuriousMarc

Our HP 8568B 1.5GHz Spectrum Analyzer is broken again (we first repaired it 8 years ago!). CRT display has gone bonkers. And its unusual Lithium Thionyl battery needs to be changed, followed by a recalibration. Let’s fix all this. Previous “YTO Unlock” repair series from 8 years ago: https://youtube.com/playlist?list=PL-_93BVApb5_cuWe_NmRpuYJISmqlQt4Z Our …

CuriousMarc
Computers

Restoring an IBM I/O Tester from the 1960s

December 16, 2021 CuriousMarc

Holy mother of blinkenlights! Here is the IBM IO Tester, coming to us from the 1960’s. Let’s make it work again! Our sponsors – PCBWay: fast turn PCBs, https://www.pcbway.com – Keysight: test instruments: https://www.keysight.com – Samtec: connectors: https://www.samtec.com Support the team on Patreon: https://www.patreon.com/curiousmarc Buy our merch on Teespring: https://teespring.com/stores/curiousmarcs-store …

CuriousMarc
Computers

Apollo Comms Part 8: Which Crystal?

December 14, 2021 CuriousMarc

Can we just swap the crystal to revert our test receiver to its original Apollo frequency? Maybe it’s not that simple. And we get unexpected help from yet another generous collector. Apollo Comms Playlist: https://www.youtube.com/watch?v=v49ucdZcx9s&list=PL-_93BVApb58SXL-BCv4rVHL-8GuC2WGb Links to doc: https://www.curiousmarc.com/space/apollo-s-band-communications https://virtualagc.github.io/virtualagc/QuestForInfo.html https://www.ibiblio.org/apollo/ Our sponsors – PCBWay: fast turn PCBs, https://www.pcbway.com – …

CuriousMarc
Computers

Apollo Comms Part 7: NASA phase modulated receiver

December 4, 2021 CuriousMarc

We try to bring up the original test equipment receiver for the phase modulated link. Does not go as planned, of course. Apollo Comms Playlist: https://www.youtube.com/watch?v=v49ucdZcx9s&list=PL-_93BVApb58SXL-BCv4rVHL-8GuC2WGb Links to doc: https://www.curiousmarc.com/space/apollo-s-band-communications https://virtualagc.github.io/virtualagc/QuestForInfo.html https://www.ibiblio.org/apollo/ Our sponsors – PCBWay: fast turn PCBs, https://www.pcbway.com – Keysight: test instruments: https://www.keysight.com – Samtec: connectors: https://www.samtec.com Support …

CuriousMarc
Computers

Apollo Comms Part 6: We have lock!

December 2, 2021 CuriousMarc

We demonstrate a locked bidirectional link between Earth and our Apollo transponder. Apollo Comms Playlist: https://www.youtube.com/watch?v=v49ucdZcx9s&list=PL-_93BVApb58SXL-BCv4rVHL-8GuC2WGb Links to doc: https://www.curiousmarc.com/space/apollo-s-band-communications https://virtualagc.github.io/virtualagc/QuestForInfo.html https://www.ibiblio.org/apollo/ Our sponsors – PCBWay: fast turn PCBs, https://www.pcbway.com – Keysight: test instruments: https://www.keysight.com – Samtec: connectors: https://www.samtec.com Support the team on Patreon: https://www.patreon.com/curiousmarc Buy shirts on Teespring: https://teespring.com/stores/curiousmarcs-store …

CuriousMarc
Computers

Apollo Comms Part 5: Transponder first power on.

November 29, 2021 CuriousMarc

It’s aliiive! We very cautiously turn on our transponder for the first time. Apollo Comms Playlist: https://www.youtube.com/watch?v=v49ucdZcx9s&list=PL-_93BVApb58SXL-BCv4rVHL-8GuC2WGb Links to doc: https://www.curiousmarc.com/space/apollo-s-band-communications https://virtualagc.github.io/virtualagc/QuestForInfo.html https://www.ibiblio.org/apollo/ Our sponsors – PCBWay: fast turn PCBs, https://www.pcbway.com – Keysight: test instruments: https://www.keysight.com – Samtec: connectors: https://www.samtec.com Support the team on Patreon: https://www.patreon.com/curiousmarc Buy shirts on Teespring: …

CuriousMarc
Computers

TI Silent 703 Terminal – Texas Instruments slick answer to clunky Teletypes

November 27, 2021 CuriousMarc

The Silent 703 Terminal was TI slick answer to traditional mechanical Teletypes. And ours is not only very silent, but it appears to be a screamer. Our sponsors – PCBWay: fast turn PCBs, https://www.pcbway.com – Keysight: test instruments: https://www.keysight.com – Samtec: connectors: https://www.samtec.com Support the team on Patreon: https://www.patreon.com/curiousmarc Buy …

CuriousMarc
Computers

Apollo Comms Part 4: which are 120V the power pins?

November 25, 2021 CuriousMarc

Important step to get right! We figure out the 120V 400 Hz 3 Phase power connections and the power supply control relays from misleading schematics. And Christmas comes up early in the form of original NASA communication test equipment. Our sponsors – PCBWay: fast turn PCBs, https://www.pcbway.com – Keysight: test …