Merlin phono preamp + extra gain stage

[petertub]

To reduce hum injected from AC filament AND to spare board copper you might separate filements and
feed by external wiring.
Any cathode followers will benefit from elevated filaments, other low level will benefit from filament close to zero.

 

[snapper]

@rongon
Is there somewhere the exact dimensions for the board and a parts list with the component values?
Thx

 

[emartine]

@snapper, yes. check out Merlin Blencowe web site.

 

[snapper]

Yes, I've already found it and I'm still working on the board at the moment 😎