My first tube amp

[lonerider]

My first tube amp, all pieces hand made by me. Tubes: 4 x 6П3С, 2 x 6H8С, 1 x 6H1П, 2 x 5Ц3С. I do not get enough of listening to it.
Tube radio and tube amps :: PIC_0129.jpg picture by Lonerider41life - Photobucket
Tube radio and tube amps :: PIC_0127.jpg picture by Lonerider41life - Photobucket
Tube radio and tube amps :: PIC_0124.jpg picture by Lonerider41life - Photobucket
Tube radio and tube amps :: PIC_0123.jpg picture by Lonerider41life - Photobucket
Tube radio and tube amps :: PIC_0121.jpg picture by Lonerider41life - Photobucket
Tube radio and tube amps :: PIC_0120.jpg picture by Lonerider41life - Photobucket
and video: 6P3S push-pull tube amp - YouTube

 

[Stefkorn]

Nice one lonerider, I like the way you built the enclosure, really good.

 

[aptquark]

you made the components too???? NO WAY!

Looks great.

You still have all your fingers? Im too scared I'll blow my fingers off...havnt made anything yet.

 

[lonerider]

you made the components too???? NO WAY!

Looks great.

You still have all your fingers? Im too scared I'll blow my fingers off...havnt made anything yet.

Yep..., I still number to ten, to my hands...

 

[lonerider]

Yes, all components, except the valve tubes. I still have all fingers, to my hands...

 

[lonerider]

All home and hand made (by me) components, except tubes and sockets.

 

[devilsindetails]

Very Nice...but just the brilliant glow of it would be enough to scare my little four tube SE EL84.

 

[EddieRich]

Very nice for a first project. My first amp had only 2 tubes. I like the look of wood with metal and glass, very nicely done.

 

[Shoog]

Loving it.
Show us the circuit.

Shoog

 

[lonerider]

Hello all, tomorow morning I will show the schematic drawn (finally schematics).

 

[rongon]

Who wound the transformers?

 

[roline]

The little 6P3S and their bigger brothers 6P3S-E 5881 wafer bases do make great amps. I found the 6P3S-E 5881 wafer bases to be a great low cost output tube, they sound very respectable in triode mode....

 

[lonerider]

Hi. First, my english are poor.
I returned, as I said, to introduce the schemas and how I worked this amplifier. Schemas I initially took on a Russian forum, to which I applied some changes to the vacuum tubes that I had. Everything is done manually and here I mean the case, the AC/DC transformer and audio transformers. Audio transformers (14.5 cm ^ 2), primary winding consists of four coils in series, each winding has 750 turns, wound in four rows of 187.5 turns, 0.1mm insulated between layers, with 0.25mm copper wire section , enamel, in clockwise. Secondary winding consists of three coils each with 117 turns of 0.5mm section copper wire, enamelled, connected in parallel and wound counterclockwise. Sections of primary and secondary sections have been inserted one by one to end. I worked 4-5 hours to one of them.
DC power was made with two 5Ц3С rectifiers connected in parallel to keep full stereo amplifier, two pi filters, one for each channel, built by two choke and electrolytic capacitors.
The low hum is heard only by ear close to the speaker, but on the other hand, something is sound like a slight buzz generated by the tube, I think, 6Н1П. If I remove this tube from the circuit, all that noise disappears (I try other tubes 6Н1П-ВИ and 6Н2П-EB and the same). Noise is not annoying, but easily heard during breaks between songs. Can give me some advice how to remove it. Do not know the power output on the speakers, because I don't know how to calculate it. I attach here the schemas. I used Russian tubes because these are easy to find here, in Romania, are cheaper and are good. I have done this amplifier with users advice from elforum.