Friday, July 7, 2023

The New Stereo Single Ended 300B Power Amplifier - Part 1

Hi!

I am currently working on a new chassis style for the stereo 300B power amp.





So far I built the stereo 300B amp with external power supply. Either in two tower chassis or in the portrait style chassis.



The new version shares the same circuit and the same amount of transformers and chokes. Space is saved by the use of more compact capacitors.



But still without any electrolytics in the high voltage supply.



The first assembly steps are completed.



All signal relevant parts are mounted closely beneath the top plate.



The power supply and filter sections will be on separate modules.



The chassis is 305*305mm and 400mm high (plus feet and tubes)



Stay tuned for updates as assembly progresses.



Best regards

Thomas




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