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Larazrus 300B

Hi Everyone, I got a bunch of parts leftover from a failed 300B project from 10 years ago. I'm looking for assistance to incorporate this parts into a new DIY 300B build. I really like the Skunkie Design Budget 300B schematic. I would like to learn how to size all the components based on the Power and Output transformers that I have (ClassicTone 40-18069, Edcor CXSE25-5k-8ohm).

The Secondary Output of the ClassicTone is as follows:

380 V (RD/YW)

330 V (RD/WH)

0 (RD)

15 V (VI)

0 V (VI)

15 V (OR)

0 V (OR)

60 (GY)

0 V (GY)

6.3 V (GN)

0 V (GN)

I also have Neurochrome's 300B PSU R2.0 power supply and two each of his Universal Filament Regulator R3.3 5v and 6.3v and their 21st Century Maida Regulator (adjustable up to 495v) for B+ supply. Not sure if I want to use all of that. Would definitely need testing before use.

Thanks in Advance,

Bobert

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Skunkie
Skunkie
Jul 30, 2025

It's looking great!!!

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