OTL, Output Transformerless Amplifier User Group.
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Tube rolling Atma-Sphere M-60
|Posted on December 28, 2016 at 09:53:38|
Location: Space Coast, Florida
Joined: June 29, 2014
Recently did a full tube roll on my M-60's. Ken-rad 6sn7's and RCA 6as7g's.
Not a night and day difference, but everything is better. Lots more dynamics,
increased micro detail-better sense of presence. There used to be collapse
of sound stage on dynamic peaks-no more and clearer. Well worth the investment
I was lucky to find all
NOS tubes. System is bi-amped with ribbon tweaters
|RE: Tube rolling Atma-Sphere M-60, posted on December 29, 2016 at 05:57:16|
Joined: December 8, 2003
Since: March 28, 2017
|Yes. My Atma MA-1 Silver Edition amps also got a Christmas present: a set of Chatham 6as7G output tubes. More transparent, smoother, wider soundstage. Lovely, just lovely.|
|I'm quite happy with the Tung-Sol roundplate 'N7s..., posted on December 30, 2016 at 16:17:03|
Location: Phoenix, Arizona
Joined: December 10, 2004
Since: December 13, 2004
...I fell in love with years ago. I accumulated a couple dozen, and this year, with my new M60 Mk.3.3s I'm using them again. I use A-S's gain-reduction plug in one spot so only 3 TSRPs per amp.
For outputs, I still have LOTS of Winged-C 6H13Cs from the couple boxes I bought this summer.
Tin-eared audiofool, large-scale-Classical music lover, and damned-amateur fotografer.
William Bruce Cameron: "...not everything that can be counted counts, and not everything that counts can be counted."
|RE: Tube rolling Atma-Sphere M-60, posted on December 31, 2016 at 00:40:13|
Joined: November 5, 2004
|Same here. I changed the 28 output tubes in my Ma-1s to RCA 6AS7G. I gave them 72 hours of burn-in (standby). 2 of the 28 failed quite soon, but the rest have been running for close to two years with no problems. I consider changing some of the driver tubes too.|