6EB8\6GN8 P-P Output 2*12w Class-B

[davorin]

Here is my small int.amp. with 4xPCL805 and 2x5879:

 

[TURING]

I did a PP PCB design using 6jt8, 6kr8 tubes for a small headphone amp. I was thinking it should be able to power 32ohm cans with little Merit A-2900 universal transformers rated at 4watts, it should be able to do 1/4watt output with GNFB . I was hoping that GNFB would help with the low and hi end where the little iron runs out of steam.... I started this idea a year ago but ended up making a 6LU8 version of this concept instead with 6CG3 diode that made a wonderful amp.
I will configure as 14K primaries 32 ohm outputs. I have a 6X4 tube as a slow warmup pass device in the B+ string...
Next will be to do a trasfer toner PCB, etched in a ziploc bag.....

PP circuit are used in chokes, cathode resistor, is not a good way, it will seriously affect the PP circuit performance.

 

[TURING]

Here is my small int.amp. with 4xPCL805 and 2x5879:

Very beautiful.Changing ideas about using FU17 (QQV03-10) +6 N2 (12AX7) will have better results. However, this use of vacuum tubes which I like PCL804, even smaller power, sought greater output.

 

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Why not indeed! With almost double the allowable plate dissipation (9W) a pair of ECL86s will easily produce 14 watts of power with 300V supply voltage.

The more the more simple circuit will have better sound quality. Many an incense burner and more an Ghosts!
Hope to see you soon ECL86 PP.
I am here this is difficult to see ECL86 vacuum tubes. Up to 6F3 choose from. Had considered using FU17 +6 N2 do pp output. Later chose 6EB8, 6EB8 my hands are some old stuff, more than a dozen manufacturers of each one, and some are 6GN8, spent a lot of effort to find this out 4 "Parameters" relatively close. Laughed!

 

[TURING]

there is the 6dx8 and the 6bm8 to try...

6bm8 is ECL82 it. It was only a very good vacuum.