Testing a 15GP22

[Electronic M]

Originally Posted by Radiotronman

Well it sounds like I’ll be waiting for the etf to ramp up their crt rebuilding production then....

It ain't over till the fat lady sings... throw a tester on it and see what it does... I've seen monochrome metal cone CRTs with whiteish ghosts of getters make a decent picture...

If it is a ct100 you could bring it here and I could slide my working chassis into your cabinet and check it the surest way.... with a working chassis.

[Radiotronman]

Tom, thanks for offering to do that, but I don’t live that close to you! I have a sencore cr70, but the universal adaptor hook kinda confuses me. Unless I hooked it up wrong on a 10BP4, it didn’t seem to work. I need to try it again. I also have a bk 465, but need help on how to use that on this crt.

[Electronic M]

Originally Posted by Radiotronman

Tom, thanks for offering to do that, but I don’t live that close to you! I have a sencore cr70, but the universal adaptor hook kinda confuses me. Unless I hooked it up wrong on a 10BP4, it didn’t seem to work. I need to try it again. I also have a bk 465, but need help on how to use that on this crt.

If your 465 is like my 466 then the main connector on the end of the CRT cable is a 10BP4 style socket...That socket plugs right onto those 10BP4s without an adapter. Mine did not come with a universal adapter so I made my own the lazy way: I took the base off a defunct oscilloscope CRT (same base as a 10BP4 but with all the pins populated, but of course the base from a dud CRT would also work) soldered leads into the red/monochrome gun and heater pins and made my own single gun universal adapter (I may expand it out to three guns someday). You can use the 10BP4 pinout or an existing adapter and ohms/beep mode of a DMM to figure out pinout of the adapter base. I color coded my wires and added some alligator clips to the ends and it workes fine anywhere I don't have an adapter but know enough about the CRT.
All you really need for the 466 to test a CRT gun is the heater leads, Cathode, G1 and G2. All the other pins of the CRT (like focus) are not really functionally connected.

[Kevin Kuehn]

Originally Posted by Radiotronman

I have a sencore cr70, but the universal adaptor hook kinda confuses me. Unless I hooked it up wrong on a 10BP4, it didn’t seem to work. I need to try it again. I also have a bk 465, but need help on how to use that on this crt.

Make sure your switch settings are as stated below whenever using the universal adapter.

https://c2.staticflickr.com/2/1922/4...6b6ebce1_b.jpg

[Radiotronman]

On my bk 465, the socket for the 10bp4 socketbis part of a multi socket adapter. I will use the socket from a crt brightner to make this test socket. What pins should there be leads to it and do you have pictures of yours Tom? Kevin, thanks for that link to the sencore, I will double check my settings and try it again.

[Radiotronman]

Kevin, I did everything the manual said and my 10bp4 that I know is good didn’t light up. Something must be wrong with the tester. So I’ll have to make the adapter Tom mentioned.

[Electronic M]

Originally Posted by Radiotronman

On my bk 465, the socket for the 10bp4 socketbis part of a multi socket adapter. I will use the socket from a crt brightner to make this test socket. What pins should there be leads to it and do you have pictures of yours Tom? Kevin, thanks for that link to the sencore, I will double check my settings and try it again.

The socket on mine is both the 10BP4 socket and the receptacle for the adapters the red gun and monochrome gun are the same switch setting on the gun select switch on mine. They mapped the monochrome gun socket pins to an additional set of pins I used at least one pin of that additional set in my adapter...Since it sounds like the 465 uses a different socket on the end of its main cord my exact pin map probably won't work for you...Never the less here is what I made to give you a general idea of what you want to make.



A 10BP4 has the exact same amount of populated pins as your tester needs to test a tube. https://www.radiomuseum.org/tubes/tube_10bp4.html
You need the two heater pins (1 and 12) on either side of the key on the bakelite center locator 'pin', Cathode pin 11, G1 pin2, and G2 pin 10...
Those wires are color coded on any normal color CRT harness as heater (Brown or sometimes black), Cathode (yellow with stripe the same color (R,G,or B) as the gun being driven), G1 (solid color the same color as the gun being driven), and G2 (White with stripe the same color as gun being driven).

I color coded my leads to match a standard color CRT harness (with only a red gun) then added tags to the leads so I would be certain to remember what each lead is meant to go to. I actually used that crude adaptor to test my 15GP22. I had to switch off twice and swap the Cathode(K), G1 and G2 leads to the other color guns but it did the job fine.

PS: Sorry for the slow reply I've been in swapmeet mode since ~noon yesterday.

[Tomcomm]

Tom............Your last photos did not share with me. Why was that?

[Electronic M]

Originally Posted by Tomcomm

Tom............Your last photos did not share with me. Why was that?

Flickr plans to delete or ransom photos from free account s with more than 1k images.... I was at 1400 plus so I had to delete over 400 to meet their limit.... most of it was things I've sold but I had to break a few less important pics to...

I now need to delete stuff from Photobucket to make room, create a new Flickr account, or go shopping for a new free image host....