Tube DIY Asylum

RE: Basic differences among power supplies

24.27.41.140

Triode_Kingdom

In Reply to: RE: Basic differences among power supplies posted by Stephen R on May 21, 2025 at 02:10:07

Choke input supplies need at lease a small capacitor ahead of the choke. Otherwise, the choke creates large voltage spikes at its input terminal and significant EMI that will travel throughout the amplifier.

Follow Ups:

I use .67 cap (or smaller) in all my choke input supplies... The so called flywheel design sounds superb - Cleantimestream 07:07:54 06/11/25 (0)
,�.47 cap.... .32 Henry 600 ma. choke 10 ohm, 20 uf film cap, .7 filament choke dcr .7 (this thing is huge and comes from old Allen organs FOR filament) 50 uf film cap... Then use 10uf for rest of the circuit save for Elna Silmic 2 63 or 100 uf for filament. Depends on circuit.
The Mind has No Firewall~ U.S. Army War College.
I use .67 cap (or smaller) in all my choke input supplies... The so called flywheel design sounds superb - Cleantimestream 09:46:48 06/09/25 (1)
,�.47 cap.... .32 Henry 600 ma. choke 10 ohm, 20 uf film cap, .7 filament choke dcr .7 (this thing is huge and comes from old Allen organs FOR filament) 50 uf film cap... Then use 10uf for rest of the circuit save for Elna Silmic 2 63 or 100 uf for filament. Depends on circuit.
The Mind has No Firewall~ U.S. Army War College.
- flywheel design- Pasternack?_nT - Cleantimestream 10:20:22 06/09/25 (0)
  !
  The Mind has No Firewall~ U.S. Army War College.
RE: Basic differences among power supplies - Stephen R 23:26:35 05/21/25 (0)
If the choke is designed for that use, a relatively high AC voltage across it, there isn't a problem.

Post a Followup:

FAQ

Post a Message!

Forgot Password?

Moniker (Username):
Password (Optional):
	Remember my Moniker & Password (What's this?) Eat Me
E-Mail (Optional):
Subject:

Message:	(Posts are subject to Content Rules)

Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:	Automagically notify you when someone responds.

To view your new posting or follow-up, click on the RELOAD or REFRESH button on your browser.

This post is made possible by the generous support of people like you and our sponsors:

Kimber Kable