Tubes Asylum

Rectifier flash

50.80.123.193

vacuumtube1954

I noticed that when I turn my amp on the 5R4GY will flash at start up. There is no popping or other weird sounds and the amp plays fine. But is this ok ? Thanks.

Follow Ups:

RE: Rectifier flash - Neff 04:03:15 03/19/12 (2)
I have experienced the same issue in a properly designed circuit. After replacing the tube with a new tube the arcing issue goes away.

At times an input capacitor that is higher in capacitance than recommended by the tube manufacture can cause arcing too. I believe the 5R4 is rated for a maximum of 20uF.

If your PS is an input choke type, placing a .2uF oil or film cap on the inbetween the rectifier and choke will reduce the large start up spike and the arc at start up in the rectifier tube will stop. I would recommend a .2uf capacitor voltage rating at lease 3x the operating voltage.
- Thanks Neff ! - vacuumtube1954 12:49:21 03/19/12 (1)
  Appreciate your help and advise.
  - RE: Your're welcome !..............nt - Neff 18:38:40 03/19/12 (0)
    .

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:

Signature Sound

[ Signature Sound Lounge ]