Main Restorations Software Audio/Jukebox/MP3 Everything Else Buy/Sell/Trade
Project Announcements Monitor/Video GroovyMAME Merit/JVL Touchscreen Meet Up Retail Vendors
Driving & Racing Woodworking Software Support Forums Consoles Project Arcade Reviews
Automated Projects Artwork Frontend Support Forums Pinball Forum Discussion Old Boards
Raspberry Pi & Dev Board controls.dat Linux Miscellaneous Arcade Wiki Discussion Old Archives
Lightguns Arcade1Up --- Bug Reports --- Site News

Unread posts | New Replies | Recent posts | Rules | Chatroom | Wiki | File Repository | RSS | Submit news

  

Author Topic: Tube Coating  (Read 341 times)

0 Members and 1 Guest are viewing this topic.

CHRIS-F

  • Trade Count: (0)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 177
  • Last login:August 04, 2022, 09:40:30 am
  • I always have screws left over after repairs :-)
Tube Coating
« on: June 27, 2022, 09:44:50 am »
Hi All,

Just wondering if the coating on the back of tubes by the Anode is important? and what is it? I scraped it a little discharging the tube, but it was already pretty scraped to begin with, does it need to be replaced and if so what do you use?

Thanks,
Chris.

buttersoft

  • Trade Count: (+1)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 1434
  • Last login:Today at 01:03:14 am
  • Is running at 15kHz
Re: Tube Coating
« Reply #1 on: June 27, 2022, 07:37:49 pm »
That shouldn't matter. Just make sure the area and the anode cap are clean. If you're still getting a little arcing or even corona after that, you can line the rim of the anode cap with some dielectric grease like spark plug grease.

bobbyb13

  • Trade Count: (+2)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 1518
  • Last login:Today at 11:17:27 am
  • I believe I may need an intervention
Re: Tube Coating
« Reply #2 on: June 28, 2022, 01:23:54 am »
Certainly looks like primer.
Does anybody know if that was sprayed on first to get the dag layer to adhere better?

I have a few that are scratched like that one and pose no problem thus far.
Relax, all right? My old man is a television repairman, he's got this ultimate set of tools! I can fix it.

buttersoft

  • Trade Count: (+1)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 1434
  • Last login:Today at 01:03:14 am
  • Is running at 15kHz
Re: Tube Coating
« Reply #3 on: June 28, 2022, 02:30:54 am »
It's not primer, it's only ever put on around the anode button, that i've seen. And only on some tubes. I'd always presumed it was an insulating coating designed to slow down the effects of the carbon buildup from the HV, which causes arcing.

grantspain

  • I personally prefer "bog trotter"
  • Trade Count: (+1)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 6108
  • Last login:Today at 10:16:07 am
Re: Tube Coating
« Reply #4 on: June 28, 2022, 02:47:41 am »
its called anti corona dope

lilshawn

  • Trade Count: (+3)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 6893
  • Last login:Today at 02:53:42 pm
  • I break stuff...then fix it...sometimes
Re: Tube Coating
« Reply #5 on: June 28, 2022, 11:15:59 am »
its called anti corona dope

WHO YOU CALLIN A DOPE!?

 :laugh2:

grantspain

  • I personally prefer "bog trotter"
  • Trade Count: (+1)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 6108
  • Last login:Today at 10:16:07 am
Re: Tube Coating
« Reply #6 on: June 28, 2022, 03:34:09 pm »
its called anti corona dope

WHO YOU CALLIN A DOPE!?

 :laugh2:
thats pretty good, unexpected  :)

CHRIS-F

  • Trade Count: (0)
  • Full Member
  • ***
  • Offline Offline
  • Posts: 177
  • Last login:August 04, 2022, 09:40:30 am
  • I always have screws left over after repairs :-)
Re: Tube Coating
« Reply #7 on: July 01, 2022, 04:29:54 am »
Thanks Guys, I'll leave it if its not that important, I don't have any arcing, I just thought it may need doing to prevent any arcing.
I always thought it looked like the old red led paint