Testing the picture tube as a 10 bp4 assuming it is a 10bp4 but not sure of model of tv. It has a philco picture tube that I thought was dead no filament light but as I fiddled with the tube socket pins it came on after a good while of me spraying deoxit on pins. Good cutoff and emissions so 50 bucks was worth it. Does say emerson on the chassis sticker and has a few emerson tubes in it so been searching to find one that looks like it so far no go. Allll i seem to find is the emerson 639
https://www.videokarma.org/attachment.php?attachmentid=206867&stc=1&d=1726443221

Looks like a 571

Here's mine. Just restored another for a client. Weird design but they work really well.

https://live.staticflickr.com/65535/52748699769_8ab89f2b37_z.jpg (https://flic.kr/p/2ondSGR)

is there supposed to be a cover on top of the high voltage cage? Mine doesnt have a top to it.
Also I noticed that when I measured the filament voltage on the philco picture tube in it, my sencore cr 70 has the red mark for the proper filament voltage of Im guessing 6.3 volts (a/c normally in the set , Not d.c. voltage) I measure 6.14 volts the sencore is supplying so I cranked up the measured with dmm voltage to acutall 6.3 volts although d.c. volts. Is my tester a little low on volts or is it because the measurement is correct because a/c volts is slightly lower for a d.c. equivalent voltage?

already seeing the weird design, theres two can ohm resistors on the high voltage cage along with the big horizontal linearity resistor on the inside. Also the 10bp4 tube has a strange dual ion trap magnet which I assume is still a dual trap one.
Now I really get why you call the circuit design weird. Somebody loved rectifiers a lot. Question is: when one of the 25z5 or was it 6 went out, did that make the other 2 tubes work harder and burn out?
http://www.videokarma.org/attachment.php?
attachmentid=206870&d=1726666420

Here's a recent video series I made while restoring one. Emerson 571 restorations: https://www.youtube.com/playlist?list=PL4aHiwoXvLGCyokdOPqGgvlCTnETIpOJK

6.3 volts RMS or 6.3 volts DC. It's not critical. +/- 10% is fine. Don't expect your Sencore analog meter to be perfect unless you've recently calibrated it

Thats the thing id like to open my sencore tester up to see what needs refreshing and or calibrating but i dont even see how it comes apart

Oh ok i see the hv cover in your video oh welll mines missing