An externally hosted image should be here but it was not working when we last tested it.
BIRDSNEST!!!
But it sounds good!
Inner mystery of the circlotron!
When a signal is applied the voltage shifts so you get a more positive voltage on one side and a more negative on the other, thus current flows the easiest way - through the voicecoil and sweet music pops out of the speakers.
See www.tubecad.com for a more thourough workthrough on the circlotron/horizontal topologies, thats where i learned a lot about them
If you look at the following chematic you can see two currentpaths going through the speaker from opposite directions. When at idle there is no voltagedifference on the loudspeakerterminals so no current flows through the speaker. The quiesent current flows in an figure of eight (8) through the powersupplies and the fets/tubes/valves. (yes it would be possible to make a hydralic or pnumatic circlotron to) (Think subwoofer with DEEEEP BASS!!!)
When a signal is applied the voltage shifts so you get a more positive voltage on one side and a more negative on the other, thus current flows the easiest way - through the voicecoil and sweet music pops out of the speakers.
An externally hosted image should be here but it was not working when we last tested it.
See www.tubecad.com for a more thourough workthrough on the circlotron/horizontal topologies, thats where i learned a lot about them
We think alike!
http://www.diyaudio.com/forums/showthread.php?postid=490643#post490643
I have more more circlotron ideas.
Tom
http://www.diyaudio.com/forums/showthread.php?postid=490643#post490643
I have more more circlotron ideas.
Tom
If you have more ideas, im very intrested.Please tell me about them! I love the horisontal/circlotron circuit because it offers simplicity and true balanced symmetrical designs.Tom2 said:
Its easy to implement a lot of different ideas and qualities into the design.
Its a bit boring nobody seems to understand them and their special qualities.
Your zenitron circuit puzzles me.
Since the power signal current can only circulate
through the load, power supplies, power mosfets and 2200 uf caps, --- thus this implies the power signal current increases on both the positive and negative parts of the signal through both power mosfets (since the mosfets are biased on). IMHO one of
the power mosfets for a given positive (or negative for the other mosfet) part of the signal seems to work backward to what it should. In other words the KVL loop of the power supplies, power mosfets, load and 2200uf caps derives what voltage should be across the power mosfets and thus one mosfet should be decreasing in voltage across it yet the current though it is increasing??????
IMHO the difficulty I am having understanding the zenitron, SuSy circlotron circuits and x100 circuit is the circuits seem to need or have two or more ground reference points. My brain keeps telling me the circuits can have only one?????
I can't get it through my brain on how to drive a circlotron with volatage gain in a balanced way without resorting to input transformers as a way to isolate the two circlotron halves from having ground reference problems. Maybe I just don't see it yet.
Perhaps more circlotron KVL grokking needed for me!
Your aleph, resistor, lightbulb circlotrons seem ok to me.
Circlotrons are very interesting indeed!
Tom
Since the power signal current can only circulate
through the load, power supplies, power mosfets and 2200 uf caps, --- thus this implies the power signal current increases on both the positive and negative parts of the signal through both power mosfets (since the mosfets are biased on). IMHO one of
the power mosfets for a given positive (or negative for the other mosfet) part of the signal seems to work backward to what it should. In other words the KVL loop of the power supplies, power mosfets, load and 2200uf caps derives what voltage should be across the power mosfets and thus one mosfet should be decreasing in voltage across it yet the current though it is increasing??????
IMHO the difficulty I am having understanding the zenitron, SuSy circlotron circuits and x100 circuit is the circuits seem to need or have two or more ground reference points. My brain keeps telling me the circuits can have only one?????
I can't get it through my brain on how to drive a circlotron with volatage gain in a balanced way without resorting to input transformers as a way to isolate the two circlotron halves from having ground reference problems. Maybe I just don't see it yet.
Perhaps more circlotron KVL grokking needed for me!
Your aleph, resistor, lightbulb circlotrons seem ok to me.
Circlotrons are very interesting indeed!
Tom
This schematic uses the balanced line zen for
the voltage gain in the front end and a circlotron
buffer stage for the output.
Its a very simple circuit.
I use Linear Technologies Switcher Cad as a
schematic drawer. The schematic has been resampled
down to 800x600. Hopefully its readable.
Tom
the voltage gain in the front end and a circlotron
buffer stage for the output.
Its a very simple circuit.
I use Linear Technologies Switcher Cad as a
schematic drawer. The schematic has been resampled
down to 800x600. Hopefully its readable.
Tom
Attachments
No not much! You should go ahead and built it! To make it easier you should build it with 9 volt batteries and smallsignal- transistors. 2SK170 and BC 556 in the front end, and IRF 510 in the output. That way you will probably get a lot of different ideas and new solutions to eventual problems.( And its cheaper to let the magic smoke out on these.) I think its the high level of nessesity of understanding and solving the problems you encounter when building an exprimental design,- that is the best way to learn. All these simulationprograms makes it to easy to check out how something work. You get lazy and never push yourself to do that extra thinking to really solve the problem in a clever way.Tom2 said:
I have burnt a lot of resistors, transistors and a speaker on my long and winding road to these designs. But I had a lot of fun.
Try the zenitron as I sketcht it in the beginning of this thread. It works very well. I think it sounds wonderful but I would like to hear other people opinions about it.
You dont have to use the big value capacitors across the fets sourcepins. Just put a wire there instead. I used capacitors to make it more thermaly stable. Not needed. It didnt deviate more than 1 mV from my trimming of the DC offset while heating up.
It accepts singelended input signals to.
You dont have to use the big value capacitors across the fets sourcepins. Just put a wire there instead. I used capacitors to make it more thermaly stable. Not needed. It didnt deviate more than 1 mV from my trimming of the DC offset while heating up.
It accepts singelended input signals to.
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