9 inch CRT for Bush TV22

[oldeurope]

Hi, it is definately not possible to use a 10BP... in a TV22. This tube is much
to big.
But I need a 10BP4 for my Tesla 4001. The original is a 25QP20. With some
mechanical mods it was possible to use a 10KP7. OK P7 is not a TV phosphor,
but it is acceptable. I have an other Tesla, so I need an other 10 inch round
tube.

Regards,
Darius

[pallophotophone]

How about a 10Rp4 or is it an 10Sp4 - it's shorter than a 10 bp4 and it's aluminised. For that matter,a round CRT from an RCA camera viewfinder might fit the bill,too as it isn't a 10 inch tube- it has a smaller screen and shorter length. Also aluminised in the versions I've had. If I had a tube manual in front of me , I'd look it up for you.
I've seen them come up on Ebay, usually going without a single bid.
Most of the people selling them have no idea what they are supposed to be used in so the descriptions suffer.

Good Hunting !

Bob Hodge

[oldeurope]

Originally Posted by pallophotophone

How about a 10Rp4 or is it an 10Sp4 - it's shorter than a 10 bp4 and it's aluminised. For that matter,a round CRT from an RCA camera viewfinder might fit the bill,too as it isn't a 10 inch tube- it has a smaller screen and shorter length. Also aluminised in the versions I've had. If I had a tube manual in front of me , I'd look it up for you.
I've seen them come up on Ebay, usually going without a single bid.
Most of the people selling them have no idea what they are supposed to be used in so the descriptions suffer.

Good Hunting !

Bob Hodge

Hi Bob, where can I find a datasheet of it?
Do you have a foto of this crt?

Darius

[pallophotophone]

Originally Posted by oldeurope

Hi Bob, where can I find a datasheet of it?
Do you have a foto of this crt?

Darius

I'll try and find what I have this weekend. I still have boxes which never got unpacked after the big move 2.50 years ago.
I know I have some info on these tubes as I once owned an RCA I.O. camera which had a VF which used the tube I'm remembering.
When I sold the cameras and a CCU to Danny Gustafson, I'm pretty sure I kept what literature came with it.
The number doesn't appear in any of the RCA consumer tube manuals I looked at last night so it has to be a "special purpose" tube.

I'll get back to you and post it to the list Monday!

Best ,
Bob Hodge