The Dyna schematic calls out resistor watt ratings for anything that's not 1/2W.
The power supply caps with the + are electrolytic, anything else is a nonpolar cap. Don't let the old-fashioned symbols throw you.
Your reading of the electrolytic values is absolutely correct. Higher voltage ratings would be better, and the 20u cap on the far side of the filter choke from the rectifier can be increased to 100u or so with noticeable improvement in performance.
A copy of "Building Valve Amplifiers" would be a great investment for you.
The power supply caps with the + are electrolytic, anything else is a nonpolar cap. Don't let the old-fashioned symbols throw you.
Your reading of the electrolytic values is absolutely correct. Higher voltage ratings would be better, and the 20u cap on the far side of the filter choke from the rectifier can be increased to 100u or so with noticeable improvement in performance.
A copy of "Building Valve Amplifiers" would be a great investment for you.
Thanks Sy,
That's what I thought. Actually have both of Morgan Jones's books..... One could make the argument that I should have read them again more carefully before my last post.
That's what I thought. Actually have both of Morgan Jones's books..... One could make the argument that I should have read them again more carefully before my last post.
Rob, you have built a push-pull already, what about a single ended design? Then you could compare and contrast. (Un)fortunately that could require the building of a new set of efficient speakers as well 😀
danny_66 said:
Sorry for the slight thread-jacking here, but I've got to love the simplicity of this design. Has anyone tried it?
No not that one, but something similar also with a LL1660 interstage as phase splitter but with the 5670 as first tube.
I had tried out several designs with my KT88 amp and one of the last changes I made was going from a concertina phase splitter to an interstage. This made a huge step forward in sound quality.
Of all the mods I made using an interstage as phase splitter had the biggest impact soundwise.
I had tried out several designs with my KT88 amp and one of the last changes I made was going from a concertina phase splitter to an interstage. This made a huge step forward in sound quality.
Of all the mods I made using an interstage as phase splitter had the biggest impact soundwise.
yes, you will have to go to the RCA tube manual.
use a 50 watt schematic and readjust bias current to the new tube data
use a 50 watt schematic and readjust bias current to the new tube data
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