Posts by tubetime@mastodon.social
 (DIR) Post #B6PJkqZcflgTf3fI6y by tubetime@mastodon.social
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       huh, i reconnected everything and plugged the drive into my HP85, and it actually works! i can read the files on it.
       
 (DIR) Post #B6PJkqgiFPM612yxA8 by tubetime@mastodon.social
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       one of the programs.
       
 (DIR) Post #B6PJkqnnp31iN2IcDI by tubetime@mastodon.social
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       unfortunately the floppy drive isn't quite working. i can't format this new disk. the drive makes a very rattly sound, so it's probably something mechanical.
       
 (DIR) Post #B6PJkqwfI67EoWRh1k by tubetime@mastodon.social
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       3 1/2" = light mode5 1/4" = dark mode
       
 (DIR) Post #B6dkEFWuHbGETrVxFw by tubetime@mastodon.social
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       got some time to take the drive out again and clean it again. i ended up having to remove this entire sliding side plate because there was still some old crusty lubricant. it is much better now. i also lubricated the head stepper worm gear.
       
 (DIR) Post #B6dkEFmVLbjnGEoPZI by tubetime@mastodon.social
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       much better, it actually formats the disk! BTW this 3 1/2" format is very odd. 600 rpm, 66 tracks, 16 sectors per track, single-sided, 270K capacity, 256 byte sectors.
       
 (DIR) Post #B6dkEG12TZMbzJc1Ds by tubetime@mastodon.social
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       why all this work? i need to work with some very early 3 1/2" disks. this example has an oval window but more surprisingly, the disk shutter must be opened manually before you put the disk in the drive!
       
 (DIR) Post #B6dkEGMfBAf34NjHvc by tubetime@mastodon.social
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       and it actually reads! at least, it recognizes the LIF volume label. the filesystem is for a different type of computer, so the HP85 doesn't show any files.
       
 (DIR) Post #B6m7cJOJuNIcyqN2xc by tubetime@mastodon.social
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       now that the 7000 gallon tank of methyl methacrylate has turned to solid Lucite and potted itself, the time has come to cut it in half
       
 (DIR) Post #B6sZk0bVbdHsh6l2cy by tubetime@mastodon.social
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       be sure to have that disk in hand!
       
 (DIR) Post #B7gLakbOLouPgnRCEq by tubetime@mastodon.social
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       just your average power plug.
       
 (DIR) Post #B7vMtgHqGFQjTriGoK by tubetime@mastodon.social
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       I've released the new version of my Pico2 DRAM tester! This version adds some minor tweaks, including a new USB-C power connector.https://github.com/schlae/pico-dram-tester
       
 (DIR) Post #B8BmJFABTMgABSbpAG by tubetime@mastodon.social
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       @splicer yep, just have to follow the footprints
       
 (DIR) Post #B8EEuqW6JoEp0Z3woa by tubetime@mastodon.social
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       electronics flea market thread! 🧵 this is at West Valley College in Silicon Valley.
       
 (DIR) Post #B8EEur48HHSai6z7rM by tubetime@mastodon.social
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       interesting turntable is very vertical
       
 (DIR) Post #B8EEurOh2puHjsbXuK by tubetime@mastodon.social
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       at some point RF engineers just have to admit that they're plumbers.
       
 (DIR) Post #B8EEurjbn4dYmkOFVY by tubetime@mastodon.social
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       ooh nice curve tracer.
       
 (DIR) Post #B8EEuvC4vgC1VujWng by tubetime@mastodon.social
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       looks like this tube has gone a bit gassy
       
 (DIR) Post #B8EEwj8kiQ54i22SAK by tubetime@mastodon.social
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       this tube tester uses a punch card to program the settings for specific tubes.
       
 (DIR) Post #B8EEwjQpdCXhc6UtLU by tubetime@mastodon.social
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       got any charges to neutralize?