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A cheap Chinese preampboard based on PGA2311, a nice display and remote control. Add a tube buffer and it's all done.

I did build a preamp for a guy as a compensation for a stalled project.

The tube was added as the chip, PGA2311, hasn't the drive capacity need in some case. Btw, the tube amp is a cathode follower.

Parts are bought from Chinese shooping portal, AliExpress. It can be tricky to buy stuff as prices can be given with or without Free Shipping. I noticed that chassis may be very cheap, but shipping may often double the price, but in this case the chassis came pretty cheap - including shipping.

Note the schematics are more or less just examples how things may have been done

 

SCHEMATICS

 

PHOTOS

 

LINKS

PGA2311

Chassis

6N3