Atma-sphere m 60 mkII no sound - djm1969 - OTL Asylum

OTL Asylum

OTL, Output Transformerless Amplifier User Group.

Atma-sphere m 60 mkII no sound

One of my M 60 MK II's (1999? 2000 model all stock) suddenly has NO sound output. None whatsoever. I had been swapping driver and output tubes trying to track down a persistent minor hum and suddenly total silence. The fuses are all intact. Tubes still appear to fire up and go through a normal offset and bias adjustment. After opening the bottom chassis cover to take a look I can see that the far left 1600 uf power supply cap is slightly swollen and showing leakage at the terminal base. There is also either slight corrosion or leakage evident on the ends of the 100 uf axial caps clustered in the center of the chassis. I sure would appreciate some knowledgeable guidance before I start throwing parts into the unit.
PS I have ruled out other simple possibilities (signal source, interconnects, speakers, jacks etc.)
Thanks for your time,
Dennis

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

Topic - Atma-sphere m 60 mkII no sound - djm1969 15:41:38 04/16/12 (13)

RE: Atma-sphere m 60 mkII no sound - acres verde 08:53:44 04/20/12 (1)

RE: Atma-sphere m 60 mkII no sound - djm1969 22:16:19 04/20/12 (0)

RE: Atma-sphere m 60 mkII no sound - tyu 15:04:17 04/17/12 (0)

Did you check the fuses with a meter? - Ralph 18:39:54 04/16/12 (9)

RE: Did you check the fuses with a meter? - djm1969 06:56:10 04/17/12 (8)

Check the power tubes next - Ralph 12:07:59 04/17/12 (7)

RE: Check the power tubes next - djm1969 18:20:37 04/17/12 (6)

tube failure - Ralph 09:12:07 04/18/12 (4)

RE: tube failure - roscoeiii 12:28:33 04/18/12 (3)

The tubes can't arc during pre-conditiong as there is no B+ nt - Ralph 10:00:59 04/19/12 (1)

RE: The tubes can't arc during pre-conditiong as there is no B+ nt - roscoeiii 10:21:55 04/19/12 (0)

RE: tube failure - djm1969 16:57:41 04/18/12 (0)

RE: Check the power tubes next - tyu 05:32:38 04/18/12 (0)

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.