Dr. Daves Diversions | Keelog Dual PSU mod to power C64 & 1541-DC @DrDavesDiversions | Uploaded November 2020 | Updated October 2024, 3 hours ago.
In this video, I teardown, upgrade, and measure a Keelog dual PSU - a replacement power supply for the Commodore 64 plus a floppy disk drive.
This modification allows you to use this one PSU to power both a 64 and an original 1541 modified for DC power, like a 1541-II. The original 1541 draws more power than the 1541-II and other drives, motivating this upgrade providing ~30 watts DC power rather than ~20 watts.

0:00 intro
0:43 problem and motivation
5:04 Keelog dual PSU teardown and analysis
9:51 swapping the Mean Well IRM-20-5 for an IRM-30-5
11:08 measuring power draw using 1541 CHECK DISK utility
15:24 what's next? (Electroware C64 PSU & 1541-II PSU "2-in-1")

Related:
Commodore 1541-DC: a 1541 mod for DC power, like the 1541-II
youtube.com/watch?v=0t6zxi5-aD0

TheRetroChannel's Commodore 64 Keelog replacement power supply review:
youtube.com/watch?v=eJ9nWh_k_J8