3A3 High Voltage Cup Part Numbers

[Jon A.]

I tried Googling "tube plate cap". Found this right away:

https://www.rfparts.com/tubes/tubes-platecaps.html

There are three on the second page with different diameters, you should find what you need there. They're cheap too.

[Kevin Kuehn]

Originally Posted by Jon A.

I tried Googling "tube plate cap". Found this right away:

https://www.rfparts.com/tubes/tubes-platecaps.html

There are three on the second page with different diameters, you should find what you need there. They're cheap too.

What I meant by HV cup is the clear part the tube sets inside.

[miniman82]

Originally Posted by Kevin Kuehn

What I meant by HV cup is the clear part the tube sets inside.

I found this on eBay last year, it was not labeled correctly so I stumbled across it for $5. Number on the box is 78215, made of polystyrene.



There's also the later ones, from the tall cage chassis like the 16. They are identical in dimension, they just have that little angle in them which was necessary due to where they sit in the cage. If you don't mind the angle, I can send you that one since I don't really need it.

[Kevin Kuehn]

Originally Posted by miniman82

There's also the later ones, from the tall cage chassis like the 16. They are identical in dimension, they just have that little angle in them which was necessary due to where they sit in the cage. If you don't mind the angle, I can send you that one since I don't really need it.

Thanks for the offer. I took N2IXK up on his so I should be good for now. Searching that RCA number I now see there is one NOS on ebay.
I also ran across these Workman numbers last night on Ralph's Industrial Electronics, unfortunately without pictures so its a little difficult to decipher what they fit, but his prices look decent. http://www.ralphselectronics.com/Sea...est=%23%20Bolt

[Findm-Keepm]

Originally Posted by Kevin Kuehn

Thanks for the offer. I took N2IXK up on his so I should be good for now. Searching that RCA number I now see there is one NOS on ebay.
I also ran across these Workman numbers last night on Ralph's Industrial Electronics, unfortunately without pictures so its a little difficult to decipher what they fit, but his prices look decent. http://www.ralphselectronics.com/Sea...est=%23%20Bolt

I'll check the Workman listings in the Radio-TV Master copies I have. These were huge catalogs with Audio/TV/Video manufacturers listings and data, like the EEM series. Obscure stuff. I also have an Eby catalog - they made 50% of the non-acrylic/polystyrenes stuff (green and white plastic cups...), but listed all the cups, from Admiral to Zenith. I'll check tomorrow - tired tonite.

[dieseljeep]

Originally Posted by miniman82

I found this on eBay last year, it was not labeled correctly so I stumbled across it for $5. Number on the box is 78215, made of polystyrene.



There's also the later ones, from the tall cage chassis like the 16. They are identical in dimension, they just have that little angle in them which was necessary due to where they sit in the cage. If you don't mind the angle, I can send you that one since I don't really need it.

]

The insulator with the angle was for the 15's and the clones and possibly the 12. The 16 used the smaller insulator, where the 3A3 plate went into the top of the winding.