7DP4 and the 7JP4

[Eric H]

Originally Posted by ChuckA

It's fixed, that's what happens when you just cut and paste and don't proof read your own stuff.

Chuck

Oh, it is fixed, is that your Site?

[vts1134]

Chuck, what is that gorgeous set in your Avatar? It is not on your site.
*Never mind I found it*

[leadlike]

A little off topic, but while on the subject of 7" sets: What about the 7Ep4 vs. the 7JP4? I have a friend who still owns the Transvision kit he built in '47, but he threw out the crt years ago after he caught his young children rolling it around the basement floor. He has a spare 7J and would like to use it to get his set rolling again.

[ChuckA]

Originally Posted by leadlike

A little off topic, but while on the subject of 7" sets: What about the 7Ep4 vs. the 7JP4? I have a friend who still owns the Transvision kit he built in '47, but he threw out the crt years ago after he caught his young children rolling it around the basement floor. He has a spare 7J and would like to use it to get his set rolling again.

I did come across a Transvision that had a 7JP4 installed in it, worked fair.

7JP4 2nd anode is 5 to 6KV, 7EP4 2nd anode is 2KV.
A 7GP4 is a closer match only requires 3KV, but harder to find than 7JP4. Usually found in Philco 48-700 sets.

Better temp tube is a 5BP4, easier to find than either of the others and is electrically identical to the 7EP4

Chuck