Hybrid mu-follower boards in SMD

I’ve been using these boards for many years now. Haven’t offered them as is required for anyone to be experienced well enough in SMD soldering to get these done effectively. I have a reflow oven so work at scale is easier this way. I’ve been doing a lot of SMD board design and building over the past few years though.

On a busy time regardless, I found the space to build these four commissioned boards for D3a drivers like the ones I used on my 300B amplifier. There seems to be a lot of interest and build work done around this design, so happy to see this happening.

Hybrid mu-follower SMD boards
Hybrid-mu follower board

Author: Ale Moglia

"A mistake is always forgivable, rarely excusable and always unacceptable. " (Robert Fripp)

5 thoughts on “Hybrid mu-follower boards in SMD”

  1. I am using 3A5 tube connected in parallel as an input tube for my amplifier. Would be nice to try those. Bias is fixed and I run 9-10mA @ 95V.

    This would work right?

    Thanks

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