Hello Guys,
i am back here again looking for you advice, and opinion, i have ordered this diy amp board from ebay,from here, it is still on the way, so i dont have it yeat, i am looking for a schematic, because the seller did not provide a clear schematic, just this fuzzy one i had attached. Please tell me what you believe about this board.
It is without tubes, and transformers.
Thank you guys !
i am back here again looking for you advice, and opinion, i have ordered this diy amp board from ebay,from here, it is still on the way, so i dont have it yeat, i am looking for a schematic, because the seller did not provide a clear schematic, just this fuzzy one i had attached. Please tell me what you believe about this board.
It is without tubes, and transformers.
Thank you guys !
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You will have about 6 W. For OT ask Edcor USA for about 15 W, 4-5 kohm.
PT 300 v 150-200 ma, 6.3 v 3 A and more.
Or go to TUBETOWN GERMANY for Hammond OT and PT.
PT 300 v 150-200 ma, 6.3 v 3 A and more.
Or go to TUBETOWN GERMANY for Hammond OT and PT.
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Thanks, i will have a look for the PT and OT that ill find, i am thinking to wind them my self, quite a big task but i will try, at list with the OT transformers which are quite expensive.
If you prefer one class better than Hammond or Edcor OT just buy this:
TTG-EL34SE - Tube output UL transformer for EL34 / 6L6 SE - Shop Toroidy.pl
From Toroidy you will find power transformer as well.
TTG-EL34SE - Tube output UL transformer for EL34 / 6L6 SE - Shop Toroidy.pl
From Toroidy you will find power transformer as well.
2x 10 W single ended DIY kit ECC83-2xEL34
I have the same fuzzy schematic and because not all resistors had colour code rings, it was hard to really know which R had to go where. I only get 3W undistorted on my scope, then one half of the wave collapses. Who can help me out with a more detailed schematic please?
I have the same fuzzy schematic and because not all resistors had colour code rings, it was hard to really know which R had to go where. I only get 3W undistorted on my scope, then one half of the wave collapses. Who can help me out with a more detailed schematic please?
To me the schematic seems as below. I also simulated it and the results seems quite expectable. I assumed the + Ub to be 300 Vdc.
Max. output power is about 6.5 W, sensitivity 0,9 Vrms. Check the dc-voltages and compare to the simulation.
Max. output power is about 6.5 W, sensitivity 0,9 Vrms. Check the dc-voltages and compare to the simulation.
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The Amp is done,
Hey Guys,
I had finished the electronics on the amp, and i tested it, it sound acceptable, taking in consideration that is single ended, and i had used 230--> 2x6V power transformer as OT. All i did was to repack the E+I lamination's and put an air gap. I am planning to wind some bigger trany's for OT, and to finish the enclosure of the amp.
Thank you guys for all the help and tips,
Hey Guys,
I had finished the electronics on the amp, and i tested it, it sound acceptable, taking in consideration that is single ended, and i had used 230--> 2x6V power transformer as OT. All i did was to repack the E+I lamination's and put an air gap. I am planning to wind some bigger trany's for OT, and to finish the enclosure of the amp.
Thank you guys for all the help and tips,
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Hi all, sorry about my english :S I have the same amplifier, I really enjoy to mount it, and also, I like the sound, for me this 6 (really?) Wats are enoght. One question... Can I put different type of tubes?, like 6V6, or 6L6, or KT88?, In this case, what modification I have to do?, also... where can I put a pot?, in the original circuit there aren´t volume control... in the begining? or in the input of the EL34? Thanks in advance for all
Hello guys, sorry for not being active for quite some time, but life is full of action and simply there is not enough time, but i try to make some time for my projects too.
I had finished the build of the amp in this post, and i will share with you some pictures,
since inside is known, the final form is like this, hope you like it, please live a comment, if you like it or not, i accept constructive critics and advice, i am just a human, and i learn from my mistakes 😀
Here come the amp:
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I really like it! Lots of curves and a 1950's 'swoopy chrome' look. It reminds me a little of the old Automat in NYC. The big springs around the output tubes are a nice, fun touch. Are those 6V6 tubes?
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Hi mate, nice work you have done, with El300, and good OT you get a decent sound, but only 8 Watt ... hunt the good sound not the power, like me .... 🙂
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Hi, dude,
I am glad you like it, i give it away to one of my friends, as a birthday present.
the tubes are 6P6S rusian equivalent to 6V6, and the preamp tube is ECC83.
Perhaps it allright on the circuit board, but in the schematic the diode D1 is the wrong way.
Mona
Mona
The EL300 tube is a very interesting and obtain good performance in audio amplifier applications.
A notice about your construction output OT is that transformers are small and I think you can get better performance if you use these sections for OT somewhat higher.
Low frequency response to be much better at 0dB, in my opinion!
In the picture I have another solution EL300 and amplifier with ECC83:
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