6S41S Single-Ended Cathode Follower Amplifier

[niclaspa]

I am always puzzled by the low impedance claim of cathode followers.

If the speaker generates a positive current (every other half of a sine, or any other wavefor for that matter), how can the tube dampen that signal?

I don't know. Can you explain more? What could dampen a positive current from the speaker.

What I can say, is that my speakers (Pi 4) didn't sound really good until I tried them with my 6S41S cathode followers. I tried them with various single-ended amplifiers, a couple of solid-state amplifiers and a pair of Quad IIs.

 

[blix13]

The current is 110 mA through the tube. Therefore, I use LL1623 120 mA.

Thanks
In winter i will heat my room with the soldering iron and build this amp.
Tubes from Russia take a lot of time for traveling, so they will arrive in autumn

 

[niclaspa]

I recommend buying the tubes from Ukraine. I have ordered stuff from there the last year and the postal service works excellent.

 

[EC8010]

Very nice build on both amplifiers. And nice to hear that an uncommon topology works well.

 

[blix13]

I recommend buying the tubes from Ukraine. I have ordered stuff from there the last year and the postal service works excellent.

is there a shop ore You ordered via ebay?

 

[niclaspa]

I ordered from ebay.

 

[mterbekke]

I don't know. Can you explain more? What could dampen a positive current from the speaker.

What I can say, is that my speakers (Pi 4) didn't sound really good until I tried them with my 6S41S cathode followers. I tried them with various single-ended amplifiers, a couple of solid-state amplifiers and a pair of Quad IIs.

Oh, it is by no means proof it will sound bad;-)

It just shows that the theoretically non ideal high impedance drive of speakers can in your case produce better subjective sound, even when that output impedance isn`t linear along the phase of the output signal.