Category Archives: 6J5

Hackaday Prize Entry: A BSTRD Preamp

For this year’s Hackaday Prize, [skrodahl] is building a beautiful tube preamp. It’s a masterpiece of glass and free electrons, it already works, and it sounds great.

This circuit is a modified version of the Bastard, an amp published in the Danish magazine Ny Elektronik nearly 20 years ago. The original amp was a true bastard, with a transistor phono stage, a valve line stage, and an input selector that used relays. [skrodahl]’s version only uses the line stage, but part of the name remains as a nod to the original design.

The design of this amp uses octal 6J5 …read more

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Posted in 2017 Hackaday Prize, 6J5, diy preamp, preamp, The Hackaday Prize, tube amp | Leave a comment