why is it that most tube projects uses copper sheetmetal?

[rdf]

He also invented "The Mat" a round slice of very thin dampening rubber ...

Was that the burgundy one-side adhesive stuff? I found it useless for CDs but great as a damping layer between cartridge and headshell. 😉

 

[RetroAudio]

I have an old Sargent Rayment tube amp I scored at a garage sale and I get the drift that the copper is used as a conductor plane since grounds of caps and power cords and other stuff is connected to the chassis. It has a 2-pronged power cord.

 

[v-bro]

No, nothing self-adhesive, just kept in place by laws of gravity....

 

[slowmotion]

....., wood for sound! No eddy currents and other thingies giving a closed-up sound... I've realised I'm pretty alternative here as most people don't see any problems in metal as long as it's non-magnetic.

Simon

I totally agree. Heat can be a problem , tho...

 

[v-bro]

Sorry to make the comment in the tubes section, but:"not in class D though". I can just hear you guys think "sacrilidge!"

 

[v-bro]

😉

 

[Klimon]

pretty alternative? I know a guy who owns "art speak" a modding company, he puts cork mats in amps(pieces of cork floor tiles) against the metal plating.

Ofcourse a guy who puts tarmac in his breakfast cereal is more alternative but that's not the point here... To apply to the subject: if those amps were built from wood in the first place they would never need cork dampening (and lack the closed-up sound that no addition can cure once metal is envelloping signal circuitry).

Heat can be a problem , tho...

imo that's the main backdraw... Chamfering around the tube holes + mounting iron above the chassis should solve the worst of problems, I can imagine chassis heat dissipation can be more of an issue with certain high power tubes.

Simon (solid wood)