Preamptubes-Layout on Smallbox 50

[eddiespaghetty]

Hi,

I'd like to know, which purpose has V1, V2 ...
Is V1 for the Plexi-channel, V2 for the BE-channel?

V1 is next to the input jack, I guess?

I would apreciate, if somebody could explain

Cheers!

 

[Browns Fan]

I think they should have that info for everybody in the owners manual or on there web page. This question has been asked before with other amps also.

 

[Tom-Andrew]

Yes, by common convention, V1 is the preamp tube closest to the input.

V1 and V2 are used for both channels.

Getting a bit technical;
The BE design is a three gain stage + cathode follower (CF) design. A plexi channel is a two gain stage + CF design. You can use two 12AX7 tubes to get this arrangement by using relays to do some clever switching.

 

[eddiespaghetty]

Thank you for your response!

Best wishes!