Leben CS 600 ( Dumper tube ) Tube rolling

That's a 'damper tube' used in color televisions, but its basically a rectifier. Since the Sylvania is a perfectly good tube, I wouldn't worry about it.

@atmasphere +1 Those old TV damper tubes make good robust rectifiers! They lack slow warmup though! Tube circuits should have the heater voltages applied first and allowed to warm up before being slammed with high B+ voltages.

Ralph is the expert but rectifier tubes can change the sound in some amp designs. 

The difference stems from allowing the power tubes to see higher or lesser voltage. 

My Ampsandsound Nautilus single ended triode amp modeled after the HK 16 is one such amp. 

Those old TV damper tubes make good robust rectifiers!

Agree

Tube circuits should have the heater voltages applied first and allowed to warm up before being slammed with high B+ voltages.

Yes, and that's one of the great design elements of an @atmasphere  amp

Sorry, crazy mobile interface

I tried a few different ones. Didn’t notice any difference. 

Different brands of rectifier tubes have a dramatic effect on Audio Note components. Their power supplies use tube regulation as well which also affects sonic signature. Don't know why it should.

So, I realized in my "box" of tubes, I did have a RCA NOS 6CJ3 hanging around.

I tried it in place of my stock Sylvania and did notice a difference in tone.  The RCA was in fact a touch warmer and more melodic.

Interesting for sure.  

I have procured a GE made Amperex ( for 10 dollars ) and will give it a try as well.

Thanks for your insights and happy Thanksgiving

I have a few of these sitting around if you want to buy them. Interesting that you find they make a difference.

Happy Thanksgiving!