Tube Amp Archive

Sound of silence . Is that a reference to what will never be posted ? I may never do a post power amp based on a pair 300b , using Surface as a pre-amp , as what was on my mind when I first captured the CM concept. I may, however, do a post power amp, based on a pair of 6L6 , which would not requir...

when i see this "i'm first"..(to insert somewhere one component of 0.2 $) .. in a world of billion people.. for sure you are not first...in anything, this is for sure. NHF :wink: then "first published" on the internet...this can be also a question.. just to make things realistic. anyway in 2010 was...

sluckey wrote: ↑Wed May 31, 2023 2:14 am

gmm20 wrote: ↑Wed May 31, 2023 1:48 am .... and as a side note , i still do led bias on all my gain stages ....

Did you get that from the Valve Wizard?

I did it first on a Valve Junior , so valve wiz got it from me.

no riddles.
is a real power filter , nulls the a/c ripple via the common mode rejection.
i post videos to show proof of concept.
I'll do a block diagram , then see how this plays.....

.... and as a side note , i still do led bias on all my gain stages ....

-g

I should not mention the 300b does not have a cathode. Well , for example, some guitar amp builds do use dc filaments, like the Valve Junior. But one of my design goals, is to use this circuit to obsolete other power supply filters, like switching regulators, and linear regulators. Efficiency goes u...

Blencowe already done that.
But, I will post more after I receive my last order of parts from my vendor.
This circuit not yet fully complete.

-g

..... and allow MerlinB to have it ?
I don't think so.
Maybe as a PM.

-g

No, I don't normally post schematics, to ensure my design work does not fall into the wrong hands, like MerlinB.
You want to throw me off, go ahead....
It's a real circuit, when I was thinking of a more painless way to provide a clean power source for something like filament power for a 300b.

-g

https://youtu.be/-HHfrJvo3aU this circuit null the A/C ripple voltage, but also acts as a passive voltage regulator. Bear in mind, this is all done with injecting an error correction signal, into the back end of the DC rectifier. Since there are no active devices, no transistors, no "IC linear regul...