Little things that bug me

Doc B. · 1165

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Offline Doc B.

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on: February 08, 2021, 01:09:34 PM
Those are not "smoked glass tubes" that you are looking at on ebay. The opaque coating is Aquadag - Aqueous Deflocculated Acheson Graphite - colloidal graphite. It's there to reduce the emission of secondary electrons through the glass envelope, which are emitted when high energy primary electrons emitted from the cathode strike a metal part in the tube. 

Dan "Doc B." Schmalle
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Offline Alonzo

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Reply #1 on: February 08, 2021, 01:49:39 PM
I used to use a lot of that stuff when at work, but it was called Neolube then.

Alonzo
Gameroom:>Mainline to HD820, SR45 to Pipette
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Offline Colonl_Charisma

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Reply #2 on: February 08, 2021, 02:26:59 PM
Thanks Doc! This is really cool info that I was unaware of mainly because I only ever see "smoked glass" in the description of those tubes.

Ross

Offline Tubegopher

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Reply #3 on: February 09, 2021, 07:32:19 AM
It has been awhile since I had my yellow lab deflocculated. I better get him into the vet!  ;D

300B amps with 6SJ7 in Triode mode, dc fil. volt. for 300Bs. BeePre with Bill Milosz built Eros Phono. Teres Turntable, Pete Riggle "12 inch Woody Tonearm" Grace F9  with Soundsmith ruby cantilever stylus.Cambridge Audio CD with MHDT Labs Orchid DAC Rega NAOS Spkrs, Atelier Rullit super tweeters

Offline canonken

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Reply #4 on: February 13, 2021, 04:27:09 AM
WHAT!!!???

I just paid some guy an extra $100 per tube to upgrade them to the smoke finish on the tubes I just bought!

Kidding, but yes I get annoyed with things like that too, especially when they come from the 'experts' selling them.  Good information.


Offline mcandmar

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Reply #5 on: February 13, 2021, 04:46:26 AM
I got another one for you, "Rainbow tubes".

M.McCandless

Offline canonken

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Reply #6 on: February 13, 2021, 05:03:07 AM
I prefer my sound to be uncolored, thank you very much! ;D


Offline johnsonad

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Reply #7 on: February 13, 2021, 06:58:06 AM
Those rainbow tubes look cool! 

Aaron Johnson

Offline 2wo

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Reply #8 on: February 13, 2021, 06:23:45 PM
They do look cool, I'd pay extra for that  ;)

John S.

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