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21st December 2012, 10:23 PM
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#1 |
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diyAudio Member
Join Date: May 2011
Location: Quad Cities USA
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Easy Little 6L6 SE
A while ago I was just poking around on the net and ran across this schematic for a 6L6 SE amp at Single Ended Tube Amp project [/URL]
I got bored and started building it one afternoon and just finished it a few days ago and I have to say that for such a simple little circuit it sure sounds great! I just wanted to post about this to share this with those of us who know their way around a schematic and understand how tube circuits work but are by no means "Tube Gurus". It was a fun weekend of soldering point to point and tweaking things around. Anyway, I recommend this for anyone who wants to give point to point SE a try. May all of you have a very happy and safe holiday season!
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Marty: "Why don't you just make 10 louder?" Nigel: "...These go to 11." Last edited by oldschooltube; 21st December 2012 at 10:26 PM. Reason: Add Schematic Photo |
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21st December 2012, 10:36 PM
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#2 |
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diyAudio Member
Join Date: Aug 2006
Location: Taxland, New Jersey
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The laminations of your output transformers look like they are arranged for push-pull (no gap), unless there is something about them that I don't know or can't see. Comments?
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"The supercomputer is technologically impossible. It would take all of the water that flows over Niagara Falls to cool the heat generated by the number of vacuum tubes required." ~ Professor of Electrical Engineering, New York University |
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21st December 2012, 11:24 PM
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#3 |
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diyAudio Member
Join Date: May 2011
Location: Quad Cities USA
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Actually the output transformers are underneath the top plate. Those transformers on the top are the HV on the sides and the filament in the middle. Each channel has its own independent B+ supply.
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Marty: "Why don't you just make 10 louder?" Nigel: "...These go to 11." |
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21st December 2012, 11:30 PM
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#4 |
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diyAudio Member
Join Date: Aug 2006
Location: Taxland, New Jersey
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Ah....that explains it.
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"The supercomputer is technologically impossible. It would take all of the water that flows over Niagara Falls to cool the heat generated by the number of vacuum tubes required." ~ Professor of Electrical Engineering, New York University |
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22nd December 2012, 05:46 AM
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#5 |
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diyAudio Member
Join Date: Jan 2005
Location: The emerald city, Seattle, WA.
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The 200 ohm cathode resistor seems a little low to me for a 6L6.
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"No man really becomes a fool until he stops asking questions" - Charles Proteus Steinmetz |
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2nd January 2013, 01:11 AM
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#8 |
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diyAudio Member
Join Date: Apr 2004
Location: Plainsboro, NJ
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The 7591 is a different "kettle of fish". Its drive requirements are much lower that those of the 6L6. Small signal circuitry usually associated with EL84s and 6V6s is appropriate for driving 7591s.
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Eli D. |
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