Usagi Electric | Restoring an HP 521A Frequency Counter: Part 2 @UsagiElectric | Uploaded March 2022 | Updated October 2024, 10 hours ago.
We’re back into the 5221A Frequency Counter! We finish recapping the rest of the black beauty capacitors with some nice new axial ones, and then we start troubleshooting, trying to get it to behave properly. We get it pretty close in this one!

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Music:
Artist: Ben Prunty
Title: Impulse
benpruntymusic.com

Ben, if you see this, thank you so much for the years and years of excellent music! You’re one of my personal music heroes and to have some of your music in one of my tiny little videos is absolutely mega. Thank you so much!

Intro Music adapted from:
Artist: The Runaway Five
Title: The Shinra Shuffle
ocremix.org/remix/OCR01847

Thanks for watching!

Chapters
0:00 Intro
1:08 What capacitors still need replacing?
2:55 Recap time
3:43 Let’s give it a test
5:05 We made it worse?
8:00 C204 the coupling capacitor
11:24 Our problems lie here
12:43 More repair
13:25 Testing again
16:18 Outro
16:39 Deers?!