Bottlehead Forum

General Category => General Discussion => Topic started by: Doc B. on February 08, 2021, 01:09:34 PM

Title: Little things that bug me
Post by: Doc B. 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. 

Title: Re: Little things that bug me
Post by: Alonzo 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.

Title: Re: Little things that bug me
Post by: Colonl_Charisma 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.

Title: Re: Little things that bug me
Post by: Tubegopher 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

Title: Re: Little things that bug me
Post by: canonken 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.

Title: Re: Little things that bug me
Post by: mcandmar on February 13, 2021, 04:46:26 AM

I got another one for you, "Rainbow tubes".

Title: Re: Little things that bug me
Post by: canonken on February 13, 2021, 05:03:07 AM

I prefer my sound to be uncolored, thank you very much! ;D

Title: Re: Little things that bug me
Post by: johnsonad on February 13, 2021, 06:58:06 AM

Those rainbow tubes look cool! 

Title: Re: Little things that bug me
Post by: 2wo on February 13, 2021, 06:23:45 PM

They do look cool, I'd pay extra for that  ;)