build a OTL (output-transformerless) amplifier

dwhitf · 15th November 2010, 02:35 PM

If you were going to build a OTL (output-transformerless) amplifier and you knew you had to live with it long term which one would it be.

This should have been with the last post but I made a mistake.
dwhitf

CometCKO · 29th November 2010, 01:43 AM

Putting my money where my mouth is, currently acquiring parts to build an Atma-Sphere clone. I expect this to be my "retirement" amp, so I'm trying to do it as well as I know how.

Critical issue is determining which speakers you want to use. OTL's can be picky, especially with speakers that have impedence that varies wildly with frequency. I'm currently looking at some Audiokinesis Planetariums, which seem to be a great match for the OTL.

cnpope · 29th November 2010, 02:38 PM

If the Alan Kimmel circlotron had been on your list I would probably have voted for that. I opted for "own design circlotron" as the closest choice.

Chris

dwhitf · 29th November 2010, 03:32 PM

Quote:

Originally Posted by cnpope

If the Alan Kimmel circlotron had been on your list I would probably have voted for that. I opted for "own design circlotron" as the closest choice.

Chris

looking back....

I should have not added so many of Bruce's designs

sorry
dwhitf

dwhitf · 29th November 2010, 03:58 PM

Quote:

Originally Posted by CometCKO

Putting my money where my mouth is, currently acquiring parts to build an Atma-Sphere clone. I expect this to be my "retirement" amp, so I'm trying to do it as well as I know how.

Critical issue is determining which speakers you want to use. OTL's can be picky, especially with speakers that have impedence that varies wildly with frequency. I'm currently looking at some Audiokinesis Planetariums, which seem to be a great match for the OTL.

My "retirement" amp" was the reason for the pole to get a idea of what diy guys thought what the best design was without endless experiments.

I too have chosen the Atma-Sphere 12 6AS7 clone from the "What tubes for a tube amp?" thread post #173.

I am building a Dipole speaker system with a H frame woofer about 90db with no dips.

I'm at the parts collecting phase with the amp,I wish I had a primer on the parts to buy (brand) an expensive option (best) and a upgrade option (good).

I'm like a deer in lights on resisters,cap, transformers,chassis, tube sockets,wire,

dwhitf

View Poll Results: If you were going to build a OTL amplifier to live with long term
Bruce Rosenblitt T8 OTL	3	10.34%
Flutterman OTL H3-AA, OTL 1 and OTL 3	1	3.45%
Atmasphere M60 or DIY M60	7	24.14%
Andrea Ciuffoli OTL	0	0%
Bruce Rosenblitt The Breast OTL	2	6.90%
Tubetvr OTL	0	0%
Bruce Rosenblitt Glass Audio 1990 OTL	2	6.90%
Tim Mellow OTL	2	6.90%
My own design Totem Pole	1	3.45%
My own design Circlotron	11	37.93%
Voters: 29. You may not vote on this poll

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15th November 2010, 02:35 PM	#1
dwhitf diyAudio Member Join Date: May 2008	build a OTL (output-transformerless) amplifier If you were going to build a OTL (output-transformerless) amplifier and you knew you had to live with it long term which one would it be. This should have been with the last post but I made a mistake. dwhitf

29th November 2010, 01:43 AM	#2
CometCKO diyAudio Member Join Date: Sep 2010 Location: Western CT	Putting my money where my mouth is, currently acquiring parts to build an Atma-Sphere clone. I expect this to be my "retirement" amp, so I'm trying to do it as well as I know how. Critical issue is determining which speakers you want to use. OTL's can be picky, especially with speakers that have impedence that varies wildly with frequency. I'm currently looking at some Audiokinesis Planetariums, which seem to be a great match for the OTL.

29th November 2010, 02:38 PM	#3
cnpope diyAudio Member Join Date: Aug 2009 Location: TX	If the Alan Kimmel circlotron had been on your list I would probably have voted for that. I opted for "own design circlotron" as the closest choice. Chris

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