DISCLAIMER

DISCLAIMER: Vacuum tube circuits work with dangerously high voltages. Do not attempt to build circuits presented on this site if you do not have the required experience and skills to work with such voltages. I assume no responsibility whatsoever for any damage caused by the usage of my circuits.

All rights of photos and text reserved. Usage of photos or text from my blog on other websites or for any other purpose only with prior permission. If you want to use any material from my blog please contact me by email.



Sunday, February 1, 2015

Yet Another SE 300B Amplifier, Part 2

Hi!

Beginning of last month I showed my latest 300B mono amps using Tamura amorphous core output transformers. They were lacking matching power supplies and I used them with the PSUs of another set of amplifiers. Now the power supplies in a matching color scheme are finished.




They come with the capacitors in the same metallic white. The transformer covers are graphite grey to match the Tango interstage transformers on the amplifiers. Here is the entire set of 4 chassis:




Front view of one of the power supplies:




Side view:




To allow some experimentation with the operating points of the Elrog 300B. I added an array of switches which allows selection of different taps of the power transformers, which results in different B+ voltages.




While at it I also made the DC filament supplies for output and driver tubes adjustable over a wide range to be able to use different tubes.

Top view of the PSU:




One channel:




More about this amp in an upcoming post. Stay tuned!

Best regards

Thomas



3 comments:

  1. Surely you mean Tamura, not Tamara -- otherwise they look absolutely fabulous.

    ReplyDelete
  2. This comment has been removed by the author.

    ReplyDelete