Even though it contains 2 grids, the #46 is not a tetrode. The tube was engineered in a time frame where limiting inventory was important. Set a #46 up 1 way and it is a nice, linear, Class "AB1" driver. Set the tube up the other way and it's a Class "B2" power O/P. Both setups are triodes!
ELI is absolutely correct. Check out the 47 if you want to experiment with DHP UL operation. (Not saying this is a good idea either, but IDK..)
http://www.mif.pg.gda.pl/homepages/frank/sheets/021/4/47.pdf
and
http://www.mif.pg.gda.pl/homepages/frank/sheets/093/4/47.pdf
http://www.mif.pg.gda.pl/homepages/frank/sheets/021/4/47.pdf
and
http://www.mif.pg.gda.pl/homepages/frank/sheets/093/4/47.pdf
Even though it contains 2 grids, the #46 is not a tetrode. The tube was engineered in a time frame where limiting inventory was important. Set a #46 up 1 way and it is a nice, linear,
Class "AB1" driver. Set the tube up the other way and it's a Class "B2" power O/P. Both setups are triodes!
Eli
Ok, use the 46 as exemple do not is a good idea.
But I want know if is possible use a true tetrode as 4-65A or other in a ultra linear connection...
This is my doubt !
thanks
Aldovan
This is the circuit
I think in built this circuit...
Aldovan
Even though it contains 2 grids, the #46 is not a tetrode. The tube was engineered in a time frame where limiting inventory was important. Set a #46 up 1 way and it is a nice, linear, Class "AB1" driver. Set the tube up the other way and it's a Class "B2" power O/P. Both setups are triodes!
I think in built this circuit...
Aldovan
Attachments
2E25
I posted a video with the 2E25 in triode mode some time ago, here in DIYaudio.
Do not is this circuit ?
Aldovan
Aldovan I recall hearing a variant of the circuit you just posted with the 2E25 tetrode and my recollection is it sounded relatively good. I would recommend making provisions for switching between UL and triode operation.
I posted a video with the 2E25 in triode mode some time ago, here in DIYaudio.
Do not is this circuit ?
Aldovan
2E25
I posted a circuit I designed with 2E25 in triode mode and that plays very well see my videos ....
Hytron 2E25 in Single Ended triode mode - YouTube
Hytron 2E25 tetrode in triode mode, single ended - YouTube
Hytron 2E25 tetrode in triode mode, single ended - YouTube
Aldovan
Not sure of the origins of the particular amplifier, it may very well have been inspired by a design you posted here some time ago. Anyway it did sound good..
I posted a circuit I designed with 2E25 in triode mode and that plays very well see my videos ....
Hytron 2E25 in Single Ended triode mode - YouTube
Hytron 2E25 tetrode in triode mode, single ended - YouTube
Hytron 2E25 tetrode in triode mode, single ended - YouTube
Aldovan
Not sure of the origins of the particular amplifier, it may very well have been inspired by a design you posted here some time ago. Anyway it did sound good..
Kevin
See the 2E25 in tetrode mode ultralinear class A, single ended:
Rock of caves:
Hytron 2E25 tetrode in UL SE Class A - YouTube
Hytron tetrode in UL SE class A - YouTube
Jazz:
Hytron 2E25 tetrode in UL SE Class A - YouTube
Hytron 2E25 in UL SE class A - YouTube
Nice sound ! MARVELOUS TUBE !
Aldovan
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