retro-thermionic

Retro thermionic audio harks back to the golden age of sound, utilizing vacuum tubes and thermionic valves to craft warm, rich tones. These analog components, reminiscent of mid-20th century technology, impart a distinct character to audio signals. Engineers embrace the harmonic saturation yielding vintage vibes sought after by audiophiles and music lovers. This process involves designing circuits with artistic and aesthetic intuition.

Thursday, January 15, 2026

“Five” - Pass inspired F5 Class A power amp with SMPS.

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  For some reason, still unknown, I had chronic hum issues with this build. I tried two different F5 cct. bds. and one Class AB module. Even...
Saturday, November 8, 2025

“Mimic Classic” - MM RIAA phono stage

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 As you will see by earlier posts I have made a number of these. While building the earlier couple I realised I still had parts on hand for ...
Wednesday, May 14, 2025

ArmaDillo - 600W Sure Class D power amp

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Complete apart from decal - all18kg of it. Two 600W 12A transformers, two 47,000uf Mundorf MLytic high current caps in a sturdy 3U enclosure...
2 comments:
Saturday, April 5, 2025

“Mimic - Classic and Pro”

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  I required for my own use another MM RIAA phono preamp. I had these two compact enclosures on hand and most of the parts. I only had to pu...

“MC - Loader”

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  I had a request to build a loading box for MC cartridges. Happy to have this cast Al enclosure on hand and it worked out to be a perfect f...
Monday, March 17, 2025

“Retro-EAR834p” - an EAR834p tube MM phono stage

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This is the third of these MM phono stages I have built and all for commission jobs. As an addition here a MC step-up stage was also built. ...
2 comments:
Saturday, January 25, 2025

“ZeroOne-A” - 100 year old globe DHT tubes preamp.

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  Inspired by my 71a tube amp I thought I would try another DHT preamp but with a 01a tube. Again Cunningham tubes used as with the 71a but ...
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retro-thermionic
Fifty years+ in electronics with a passion for audio.
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