Express tube chart and schematic?

[ficelles]

The tube chart for the Express seems a little odd... input is V2 not V1, and the numbering of gain stages doesn't add up unless there's an SS gain stage in the middle, does anyone have a definitive tube chart / block diagram and/or a schematic? Mine is a 5:25.

Tia,

 

[DrKev]

V2a/b -> Gain -> Tone -> V1b/a -> V3a -> master - contour - loop -> V3b -> V4 (PI) -> Power amp
V5 is reverb drive and recovery.

Google search will find schematic quickly

 

[JiJoe]

Express 5 50 +	​	Gain Stage​
Input​	2​	3​	4​
Clean	V2B​	V1B​	V3A​
Crunch	V2A​	V2B​	V1B​	V3A
Blues	V2A​	V2B​	V1A​	V3A
Burn	V2A​	V2B​	V1A​	V3A
	​	​	​

Note - this is for a 5 50 - not the 5 25 that the OP asked about - sorry.

 

[ficelles]

Thanks for the replies, I think the document I was viewing was out of date.

 

[JiJoe]

I rolled tubes recently and mapped out the signal path for each channel (above).
I compiled a document with a bunch of tube recommendations (posts from various forum threads) and colour coded tables with the signal paths. I don't know if there are DM''s on this forum - but I can happily send it to you if you can get an email address to me safely/securely. Oh - actually I see that you can attach a file in a post - I can try that.

 

[JiJoe]

Might be some use to you. It's a collection of posts, diagrams and tables. The last table is just some of the recommendations from valve kit providers that I picked up.

 

[JiJoe]

Sorry - just seen it's a 5 25 you have - this might not be right for your amp.

 

[ficelles]

@DrKev has it right for the 5:25, V2 is input, V1 and V3 gain stages, V4 PI, V5 reverb. The first manual I found referred to a 4th gain stage which I guess was a mistake.