Aroma ARC-1000A Manuel d'utilisateur télécharger pdf (Page 148)

tubes age 148

the getter material flashed upon the inside of the glass has turned brown or

discolored. The shiny stuff has become glommed by sucking up too much

gas. "getter" any material or structure inside a tube intended to glomm the gas.

Notes on Good kinds of Glow. (Any of the following tubes are supposed to glow

and if they don't, something is wrong):

- any voltage regulator or voltage reference tube. Voltage reference tubes

often both have stuff on the inside of the glass (intentionally) and glow very

faintly anyway, so you may not see the glow easily

- Rectifiers of the mercury vapor or Xenon gas containing sort. These include

872A, 866, 866A, 816, 3B28, 3B32. (The 0Z4 was an abomination of design

and manufacture, was intended to save power in car radios, almost never

lasted very long, had metal envelopes anyway, and should be discarded

instantly whenever encountered.)

- gas relay tubes such as the 2020, 2D21 and the like.

- Most thyratrons.

(Scott continutes...) Something must be wrong here. These are all NOS, NIB

shiny new tubes.

Nope, possibly nothing is wrong. If the blue is on the inside of the glass

everytjhing is just fine. Enjoy using your excellent new tubes.

>So, for the new tubes is this gas burning off? A burn in? I have only noticed

this with 6AK6's. No others.---

The gas may have been glommed by the getter material, or the plate. Roy

------------------------------------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------------

Date: Mon, 19 Sep 2005 09:46:56 -0500

Subject: Re: [R-390] Tubes glow blue

1 2 ... 143 144 145 146 147 148 149 150 151 152 153 ... 253 254

Pas de commentaire

Aroma ARC-1000A Manuel d'utilisateur Page 148