a real challange?

[Yamamaya42]

Originally Posted by Electronic M

The 630 had the front of the CRT simply resting on a cutout in the front of the cabinet that it was installed through, and the neck supported by the yoke. A piece of styrofoam tall enough to keep the neck from being crooked in the yoke should be fine. For servicing the set on its side while opperating a IIRC 5XP4 test CRT is recommended...I don't gots one so I use an 8AXP4 or once in a while just use the 10BP4 it came with.... DuMonts and their licensees are nicer on the bench because they tended to integrate the face mount into the chassis.

Anything useful will be a bit hard to find, ( plug-in compatible ) that's not way overpriced

the closest thing I can find, so far is a 8KP4 at the ETF, same general wiring and biasing, & it won't roll off the table,
the only major dif, is electrostatic vs magnetic focus, & that most likely wont matter for repair.

[MadMan]

'Ion trap' is sort of a misnomer anyway, isn't it? As I understood it, the ions and electrons are shot off at an angle, and the ion trap magnet straightens out the electron beam only and not the ions.

[Electronic M]

Originally Posted by MadMan

'Ion trap' is sort of a misnomer anyway, isn't it? As I understood it, the ions and electrons are shot off at an angle, and the ion trap magnet straightens out the electron beam only and not the ions.

The early ion traps had 1 magnet to help steer everything towards the neck wall and a second magnet to steer just the electrons back through the end of the gun...as time went on someone figured out it was cheaper and just as effective to drop a magnet and only use one to straighten the electron beam.

On another starwars note, when I was a kid in the 90s after killing (at 2-4 years old because I wanted to know why sound came on instantly but picture took time) the 70s Quasar WID color some of my first memories are of watching, and trying for years to convince my folks to let me take it apart at something like age 10 I dismantled it and later smashed the CRT (my friends and I wanted to watch ourselves on TV) and ended up keeping the electron gun because it resmebled a light saber... I still have it all these years later.

[vortalexfan]

Originally Posted by Electronic M

On another starwars note, when I was a kid in the 90s after killing (at 2-4 years old because I wanted to know why sound came on instantly but picture took time) the 70s Quasar WID color some of my first memories are of watching, and trying for years to convince my folks to let me take it apart at something like age 10 I dismantled it and later smashed the CRT (my friends and I wanted to watch ourselves on TV) and ended up keeping the electron gun because it resmebled a light saber... I still have it all these years later.

Sounds like something I would of done at that age!

[Yamamaya42]

https://imgur.com/NqVsScT

Ready Ion control...

Yes that is silicon on the pin-cap.

it was damaged over the years with all the moving, but still checks out very strong.

[Yamamaya42]

I found it!! i found it! i found everything!!!

I had little hope that all the hardware was still there from the TV over the years and all the moves, that I went so far as to go a get an ion trap that I saw on e-bay.
but today when i was looking in my shed .

https://imgur.com/pKlbRDW

I got very lucky.

al the hardware is still there!!

[MadMan]

Sweet!

[Yamamaya42]

When I do ever get this working, is to try and build a larger size cabinet for it, out of wood mostly, birch plywood, finished to match the CRT surround I have.

The electronics / CRT chamber on top, will have an clear plexyglass top, so the guts can be seen from above when running, below it will be the speaker chamber, for the 8 inch Jensen that was with it, which still seems to be good.

I don't know how tall it will be when all is said and done, will have to work that out later.
I WILL BE putting cooling fans in it though!

[Yamamaya42]

test CRT came today, a used 8YP4 ( from ETF)

https://imgur.com/5rxArRx
https://imgur.com/BjSCvw5
https://imgur.com/dBZlbdD

cute little thing!


minor scratches and screen burn, worth it, over all.

NOW I got to come up with some sort of socket to hook up to it.
the socket to my 12lp4 is damaged, ad i was going to replace it anyway, I see out there that they had adapters to hook this sort of thing up to it, I could wire up a socket for the 8YP4 temp, but I am not sure what to get to start with.

what do I look for that will plug on to this thing?

[Yamamaya42]

i know what it should look like.
bk-precision_cr-11

https://elektrotanya.com/PREVIEWS/38...r_sm.pdf_1.png

i should be able to get that socket someplace ...

edit,
ALMOST, but not quite.
the pins don't match up
https://www.ebay.com/itm/Vintage-7-p...-/123774257767

[MadMan]

Isn't that crt vastly different from what the set is supposed to use?

Also: https://www.ebay.com/itm/TELE-MATIC-...sAAOSwfiReCDlF

[Yamamaya42]

Originally Posted by MadMan

Isn't that crt vastly different from what the set is supposed to use?

Also: https://www.ebay.com/itm/TELE-MATIC-...sAAOSwfiReCDlF

It will not matter that much for the initial bringing up the set from the “dead” voltages are generally close and the yoke can be made to work on it.

Once things are more or less stable with the chassis, and an enclosure is made for it, then I will switch to the 12lp4 for the final (permanent) repairs and restore.
The test CRT is a bit more robust, and will take some abuse, and I don't want to risk the 12lp4 until I can get a stable picture on the thing.

The CRT wires on the chassis are in crappy shape ( 5 of them ) and I will be replacing them anyway, so I am planning to run them from the chassis to a terminal block, so I can easily swap out socket types when needed.

[Electronic M]

Originally Posted by MadMan

Isn't that crt vastly different from what the set is supposed to use?

Also: https://www.ebay.com/itm/TELE-MATIC-...sAAOSwfiReCDlF

Your on the right track suggesting a brighter, but the one you found is thin pin and won't fit yama's tube.

I think I may have the exact adapter you need from an old test jig in my knick knacks... Yama if I find it your welcome to it for postage cost.

[Yamamaya42]

Originally Posted by Electronic M

Your on the right track suggesting a brighter, but the one you found is thin pin and won't fit yama's tube.

I think I may have the exact adapter you need from an old test jig in my knick knacks... Yama if I find it your welcome to it for postage cost.

Please let me know if you find anything.
I'd much prefer to have some kind of socket for it, but if nothing can be found, as a last resort, I can prob hunt down a tube socket that has generally the same size pin clips, pull them out and solder wires to that and hook those to the CRT, and hold them in with heat shrink tubing.

[Electronic M]

Originally Posted by Yamamaya42

Please let me know if you find anything.
I'd much prefer to have some kind of socket for it, but if nothing can be found, as a last resort, I can prob hunt down a tube socket that has generally the same size pin clips, pull them out and solder wires to that and hook those to the CRT, and hold them in with heat shrink tubing.

I found this hanging out on the I-beam above my work bench along with a bunch of other small knick knacks which are poised and waiting for a chance to fall on my head...
I also seem to recall you wanting some lytic shells so dug some lytics from my dud capacitor museeum.

Let me know if you want any of this stuff.