I have both of these testers. I can't find a manual for either, though I understand they use the same circuit, except for the meter.

Does anyone have a manual for these?

Thanks in advance!

Here's the manual: http://www.videokarma.org/attachment.php?attachmentid=174930&d=1339696004

Here's the schematic: https://flic.kr/p/nUcJLg

Notice there's no setup chart because these are hard wired to only test 12 pin, 6.3 volt B&W CRTs. 10BP4, 12LP4, 16KP4, etc...

Bob, you're the greatest. Thank you very much! Is there any value in these? I just bought another one on eBay.

I hate to say it, but most of the value is probably in the three big neon bulbs.

Bob, you're the greatest. Thank you very much! Is there any value in these? I just bought another one on eBay.

It's a fine tester for B/W CRT's. You have to careful with the rejuvenation process. It's a little brutal. Dynamic intensifier, Medium should be used and that's when the CRT doesn't have any reading at all.
BTW, B&K made a color adaptor, that was a box with an RGB switch on it and a socket for a 21FJ type CRT. It connected to the 12 pin socket. :yes: