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National Electric 872A
Traded Jace a light fixture for this tube and a socket for it. It's a mercury rectifier.
Keywords: Miscellaneous

National Electric 872A

Traded Jace a light fixture for this tube and a socket for it. It's a mercury rectifier.

National_Electric_872A.JPG RCA D52W15B Trio of CRT Tubes.JPG
File information
Filename:National_Electric_872A.JPG
Album name:FGS / Vaccum Tubes
Keywords:Miscellaneous
Filesize:134 KiB
Date added:Dec 03, 2012
Dimensions:1600 x 1200 pixels
Displayed:955 times
Color Mode:Unknown (2)
Color Space:sRGB
Contrast:Standard
DateTime Original:2012:11:02 14:13:31
Exposure Bias:1 EV
Exposure Mode:0
Exposure Program:Program
Exposure Time:1/80 sec
FNumber:f/3.3
Flash:No Flash
Focal length:5 mm
Focus Mode:Auto
ISO:80
Light Source:Unknown: 0
Make:Panasonic
Max Aperture:f/3.3
Model:DMC-FH22
URL:http://www.galleryoflights.org/mb/gallery/displayimage.php?pid=14026
Favorites:Add to Favorites

Comment 1 to 4 of 4
Page: 1

rjluna2   [Dec 03, 2012 at 09:25 PM]
FGS   [Dec 04, 2012 at 05:54 PM]
Thanks. I put 5v into the filament and got a orange glow from one of the holes the lead goes into the cylinder. The cylinder started glowing a deep cherry red after a while. No mercury glow at all. Even on 12v. The cylinder just glowed a deep orange. I put my flyback lamp tester lead on the top contact. Nothing on either 5v or 12v.
rjluna2   [Dec 04, 2012 at 06:57 PM]
You can put 15 Watts, 120 volts incandescent light bulb in series between the filament and the anode (top of the tube) while the filament in 5 volts burning. That should have rectifier going Very Happy

/----\
| |
- <
_ > |-\
- < |
_ | |
| | <
\----/ > Light Bulb
| |
~ |
| |
\-------------/

Sorry that the ASCII format doesn't work well here Confused
FGS   [Dec 04, 2012 at 07:16 PM]
A drawing could be better. Very Happy But thanks. I used a computer PSU to test the filament.

Comment 1 to 4 of 4
Page: 1