My "Twinwreck" Express combo build

[fishy]

Congrats... that is a cool looking combo for sure.

Look forward to the clips.

[ampbldr2]

This is cool! What is that black tape inside for near the supply caps?
Notice any vibration issues in the cab?

[Noval_novice]

That is truly beautiful!

[vincenz]

This is cool! What is that black tape inside for near the supply caps?
Notice any vibration issues in the cab?

The black tape is simply to mask 3 holes drilled by error

Regarding the vibration issues, that's precisely what I have to resolve right now.
The cab is strong and rigid, there's nothing to worry about that.
But I have some microphonic interferences with some particular frequencies. No feedback, but some high pitched "chimes" sounds, especially when I play with the neck pickup (lot of bass), e.g. the C note on the 5th string...
I have tried a lot of different tubes, in particular some good NOS 12AY7 (from Mike) well-known to be very quiet and not microphonic at all.

Maybe the chassis is mounted too firmly into the cab, I will try to isolate it with some rubber or so...

Someone here had experienced the same issue with a combo

[M Fowler]

Yes you need to use some cushioning between the chassis and cab so the vibration is lessened.

Also may need to add o-rings to the power tubes.

Mark

[vincenz]

Yep, I will isolate the chassis from the cab using soft rubber tapes and some rubber washers for the screws.
I wonder if it would be useful to also work around the fastening between speaker and cab ?

And I just ordered some tube dampers....

[fishy]

Rooster brought this little mod to the forum and it might be worth looking at as it directly addresses vibration related issues.

https://tubeamparchive.com/viewtopic.ph ... ht=express

Not too sure how many others have tried this to tame V1. I ordered one but have not got round to installing it.

[vincenz]

thanks for the link. Very interesting thread...
Tri-tube ring ordered !