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Charles Bueche

12AX7VKA
Hardware

12AX7 tubes for sale

After the crazy prices seen on the market due to the embargo on Russian tubes, I have decided to sell a few 12AX7 from my stock of Voskhod 12AX7VKA and Tung-Sol 12AX7 / ECC803-S gold pins. Only selling to individuals (musicians or music-lovers). These tubes are new and cryogenic-treated. If Read more…

By Charles Bueche, 12 months28.03.2022 ago
pcp vu-meters
Hardware

PiCorePlayer with custom-made PSU

Powering a Raspberry Pi and its 7″ display is not really easy, it needs strong cables, and better be at 5.1V than 4.9, unless you want to endure the “Low voltage warning” aka “Under-voltage detected!”. I assembled this player using a Raspberry Pi 3 Model B Rev 1.2, the standard Read more…

By Charles Bueche, 1 year06.02.2022 ago
Amplifier

Class D Power Amplifier

Although not my core-business, I wanted to try a Class D module with a linear power supply – everyone is taking the easy path and feed them with Switch-Mode PSU, so why not take the other way for once. This unit is equipped with gold-plated connectors for inputs and outputs, Read more…

By Charles Bueche, 2 years21.12.2020 ago
Speaker

new Tabaq speakers

Built a pair of Tabaq speakers based on Peerless drivers. Check the Products pages for details.

By Charles Bueche, 2 years18.11.2020 ago
Hardware

Hewlett Packard 3478A Digital Multimeter, 5.5 digits

Ebay is full of good deals. I secured this HP3478A for little money. The battery saving the calibration data had to be replaced, it was 29 years old and specified for 10 years. This needed a significant effort with diverse obsolete technologies like GPIB adapters and cables. With the help Read more…

By Charles Bueche, 3 years01.09.2020 ago
Hardware

Mivoc AM 80 MKII : boosted auto-on sensitivity

The AM 80MKII amplifier module is designed for the use in an amplified subwoofer. I bought it from Lautsprechershop in Germany. I mounted this plate amp into an old JBL 125 subwoofer, it worked great after some tuning of the level and phase settings. However, the sensitivity of the auto-turn-on Read more…

By Charles Bueche, 3 years27.06.2020 ago

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Recent Posts
  • 12AX7 tubes for sale
  • PiCorePlayer with custom-made PSU
  • Class D Power Amplifier
  • new Tabaq speakers
  • Hewlett Packard 3478A Digital Multimeter, 5.5 digits
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