10W+10W EL34+ECC83 single-ended Class A Stereo amplifier Kit wlx

[quassar]

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 !

 

[azazello]

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.

 

[quassar]

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.

 

[artosalo]

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.

 

[quassar]

Thank you, i will consider the transformers from Toroidy.pl, good quality and nice finish.

 

[texmurphy68]

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?

 

[artosalo]

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.

 

[texmurphy68]

THNX artosalo!

 

[quassar]

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,

 

[Yaveaina]

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

 

[quassar]

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 !

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:

 

[rongon]

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?
--

 

[jean michel]

hello ,

i comparate the build and use tube TV ( EL 300 drived to small ECC 83 )

2 x 8 W to 1 Khz , the OPT build to Hexacom .

 

[quassar]

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 ....

 

[quassar]

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?
--

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.

 

[Ketje]

Perhaps it allright on the circuit board, but in the schematic the diode D1 is the wrong way.
Mona

 

[LAZAROIU]

hello ,

i comparate the build and use tube TV ( EL 300 drived to small ECC 83 )

2 x 8 W to 1 Khz , the OPT build to Hexacom .

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:

 

[jean michel]

hello ,

Thank Lazariou

the small stock N O S ...

 

[LAZAROIU]

Congratulations!
I envy you!

 

[Ketje]

EL300 ?? not rather EL500 ?
Mona