[jparkhur]

Morning,

Just passing some information along that I thought was interesting at least.  I borrowed some red silicon tube dampers from another AC member her to try them out on my Dodd adjustable gain Pre Amp with a Russian NOS 6H30 DR tube.  System was working flawlessly with no damper, then installed the damper about 1/3 way down the tube from the top.  Reset the tube and turn the system back on to hear a crazy crackling in the music.  Reset the tube again, same thing.  Took the tube out, removed the silicon damper, and reset the tube, no issues-muisc perfect.  Did this with another tube of the same fashion and go the same result.  I have since left the tube damper off.

?  Could this happen, did it?

? Why, to much compression?


Thoughts...

JP

[rollo]

  Got me never heard or experienced this myself with same preamp and tube. I have used both red dampers and Herbies tube dampers. Prefer Herbies to red silicone any day.
   We recco one buys a Herbies when we sell the Dodd preamp. Tenderfeet as well.


charles

[jparkhur]

Charles,

I agree, if I have Gary build me a great preamp, should spend the money and buy a better tube damper (Herbies)- I have contacted him prior.  I had access to the silicon ones, and tried them to see what would happen.  It failed.  But, I can not figure it out why this happens, as I can repeat the exact noise with two different 6H30 Dr tubes with no change in the rest of the system.  Weird.

I guess it is like putting yugo tires on a corvette......

JP

[c1ferrari]

I'm using 6H30-DR's, too...looks like I should try Herbie's products