Really nice - but also really expensive 
Regards, Holger
Yes @C0d3man ,
It’s in my radar 
Regards!
P.D: This afternoon i will try to configure my fresh “audioinjector” 
Ahhhh! Vocoder time 
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Another unlikely vacuum tube implementation: the Korg Nutube
You can find a number of hacker projects making standard Vacuum Fluorescent Display as tube amplifiers, Korg has engineered one specifically for use as an amplifier. At about 30% of the size of a conventional tube, it provides a modern alternative to the steam punk look of tube audiophile gear.
It can run on much lower voltage than traditional vacuum tubes, as low as 5V, it also has a higher impedance and gain of 5, much less than a 12AX7 tube, one might use it as a sound “tubify” effect more than an amplification stage.
Herer’s a hacker introduction to the part.
https://www.rs-online.com/designspark/design-of-a-korg-nutube-amplifier-part-1-tube-basics
And the 4th part of the series, building an amp (design files on github)
https://www.rs-online.com/designspark/design-of-a-korg-nutube-amplifier-part-4-build-and-test
Korg has an evaluation board for $100
Here’s another open source design with performance graphs, that costs a bit over $100 in parts
http://www.pmillett.com/nuhybrid.html
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