did anyone build this amplifier or is it just purely theoretical. (ZEN split load single ended amplifier i found in this tubeCAD post)

[No ideas]

 

[rayma]

Most of his schematics are theoretical, since there are too many to build even a few of them.
But they are sound enough that it would work. Notice that the supply is floating.

 

[No ideas]

i have all of the components that are needed, the coils im gonna use have an higher dcr but after some ltspice simulations and adjustments to make it work on 20V. i also have an irfp140 mosfet which seems to be very slightly faster and also has a lower gate charge and rds on.

 

[No ideas]

all i would need to add is an op amp to amplify the voltage

 

[rayma]

Good luck. How much gain do you get?

 

[No ideas]

the op amp board has an gain of ~7V per volt. the amplifier itself seems to just be a current buffer

 

[No ideas]

here is an basic prototype, all i know is thay it works and amplifies current. alongside with the fact that i lack propper inductors and heatsinks.

 

[No ideas]

here is an attempt at adding a gain stage

 

[rayma]

The R10 should be more like 50k, and R1 around 330k.
And then adjust the R6 value for 8-10 VDC across R6.

 

[No ideas]

done thanks for the advice, now im intrested if i should continue this project? i dont think anyone else done it before so why not

 

[rayma]

Why not give it a try.

 

[No ideas]

i lack propper inductors

 

[rayma]

Those inductors would be used in speaker crossovers, for example.

 

[No ideas]

speaker crossover inductors are generally expensive and these line filter i used lacks the power handling capacity and smells of glue.

 

[rayma]

You could use some toroids and wind them yourself.

 

[thirdicomplex]

done thanks for the advice, now im intrested if i should continue this project? i dont think anyone else done it before so why not

Somebody has... https://www.diyaudio.com/community/threads/improving-slaps-introducing-x-slaps.364042/

 

[No ideas]

that looks expensive and impressive

 

[No ideas]

You could use some toroids and wind them yourself.

i found an appropriate choke for 3$. https://www.tme.eu/pl/en/details/b82722j2102n001/vertical-inductors/epcos/ (price and language set to from polish and PLN to USD and english )

 

[BSST]

At audio frequencies, it appear the two 10mH inductors present a shunt path in parallel with the 8 ohm speaker, i.e 20mH. The -3dB cutoff occurs when the reactance of 20mH equals 8 ohm. 8=2*Pi*f*0.02H.

Solving for f: f= 8/(2*Pi*0.02H) = 63.7Hz.

 

[ximikas]

Such inductor will not work. For audio frequencies, you need iron based, and which allows dc current without saturation. Probably with air gap. Why not rewind old EI type transformer, and place all E parts as one block, and all " I ' as another block, and add air gap, few layers of insulation tape. Ferrite will not work here. Also, inductor you chose is common mode inductor, currents are flowing in opposite directions, and it has zero inductance for 50hz by design.