New Commodore 64 PSU

This time around I’m replacing the innards of this old Commodore 64 power supply. I’m not entire sure if this is one of the “PSU’s of death” that are so common, but let’s rejig it just in case. It’s derived from a reference design I found online, but in the end I was missing one crucial piece - see how many of you pick the obvious mistake before I do :-)

August 15, 2022 · 1 min · 71 words · TassieBob

SVI-328 80 column card - take 2!

In this video I revisit the Spectravideo SVI-328’s 80 column card, after the false start we had last time (where we ended up fixing the Super Expander instead). I also look at whether we can teach the old dog a new trick (new for the SVI, not new for the 6845 CRTC) :-)

June 9, 2022 · 1 min · 53 words · TassieBob

Apple IIc monitor repair - part 2

Finally! The little Apple IIc monitor is back together! All 9 inches of it!

May 26, 2022 · 1 min · 14 words · TassieBob

Tauntek Logic IC tester upgrade

In video #22 a month or two back I built a Tauntek logic IC tester. These are firmware upgradable, and while there were no new features in the latest release that I felt a burning desire to have, I thought I’d run through the process of doing the firmware upgrade so we could see how it’s done.

May 19, 2022 · 1 min · 57 words · TassieBob

Making an SVI-328 disc BASIC boot disc

When I got my Spectravideo SVI-328, it came with a floppy drive but no floppy discs. A chance visit to the Spectravideo Facebook group for a different matter led me to a cassette file that I could use to create a disc BASIC boot disc (and CP/M boot disc). This video runs through the process of creating the disc BASIC disc using a SVI-CAS digital playback and recording device (the process to make a CP/M boot disc is almost identical)....

May 12, 2022 · 1 min · 92 words · TassieBob

Spectravideo 80 column card - ...or not

Well, that didn’t go as planned… The “plan” was to test out the SVI-806 80 column video card.

May 5, 2022 · 1 min · 18 words · TassieBob

Repairing a Sony TC-K590 tape deck

This week I’m repairing a Sony TC-K590 tape deck. I started this a few weeks back but had to wait for parts to arrive from the UK. Was difficult to cut down 3-4 hours of footage into a watchable video without it ending up all disjointed – hopefully it came up OK :-)

April 28, 2022 · 1 min · 53 words · TassieBob

Desoldering Experiments

Experimenting with desoldering techniques in this video – hoping to solicit some feedback on how to do it better and more consistently!

April 21, 2022 · 1 min · 22 words · TassieBob

Tauntek Logic IC tester

This time around I’m building a Tauntek Logic IC tester, which should be useful for testing 74 series logic IC’s I reclaim from old equipment, and also some 4000 series IC’s. There are other testers out there, like the Retro Chip Tester Pro (which is good for testing RAM/ROM in particular), and in time I’ll probably acquire & build one of those too :-)

April 14, 2022 · 1 min · 64 words · TassieBob

Spectravideo SV601 super expander

In this video I take a look at the Spectravideo SV-601 super expander, and come across a few surprises along the way!

April 7, 2022 · 1 min · 22 words · TassieBob