the best part of this year's Early Television Convention
 

For me, it was being able to watch Nick Williams take us through the entire process of rebuilding CRT number one. We'll find out tomorrow morning if the darned thing works.

I bet that was interesting. What model CRT was number one?

That was fascinating for sure. I just wish that all of that wasn't so far over my head!

Nick is streaming live with that right now :)

http://www.ustream.tv/channel/2010-e...ion-convention

It lives!:banana:

It was a 17-something-something-P4. An unloved rectangular CRT that nobody would miss if things didn't go well.

I wish I could have watched it. I was on the road in Friday and on the road out Sunday when the demos were supposed to go down....

The situations as of about noon was that its tested OK on a tester but they were
unable to get a picture, because the
gray Research monitor they were using did not make any (my guess being that it expects a glass tube that is a good capacitor). Also ... it was lacking
an ion trap and apparently that was a bent gun.

Does anybody know if they monitor was successfully run again?

No problem getting the Gray monitor back up.

I'll try to find and acceptable set to test the CRT in this week and report the results.

Pictures posted at:
https://www.flickr.com/photos/420028...7665509928044/

What did I screw up on the Gray? I'd like to believe it was switchology on my part, but I don't know enough about the thing to say for sure what I was doing wrong.

Hope you find a good chassis to test it with Steve, if the base still arcs you'll have to coat the unused terminals with corona dope (remove the base). That was my mistake, next time I'll remember to clip the offending lead internally on the gun.


Edit: it was a 17CP4 metal tube, I apparently put a 12v gun into it. lol

I don't know what went wrong with the tube in the Gray monitor. The monitor uses a voltage doubler to get about 12 kv, and maybe the lack of the capacitive effect of a glass tube caused the problem.

Say, did anyone notice a red DMM and a pair of black handled needle-nose pliers in the CRT rebuild room? I used those there on Saturday on Tim's TS-4 set and have not seen them since...

I checked my tool box, they're not there....

Odds are they are still on the bench at the ETF. There is an old family bad habit of leaving tools where last used....Any time I need a wrench I check under the last sink to be replaced. :D

Well I hope there's a chassis at the museum that's capable of running the metal tube with minimal effort, I mean I wouldn't want to recap an entire chassis just to see light on the darn thing. Hopefully a yoke and HV wire can be extended from something close, so the tube doesn't arc out.