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  #1  
Old 05-15-2024, 01:46 PM
Aperna1985 Aperna1985 is offline
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Need to test 19VABP22 tube need specs

Hey guys so once I found out that my tube had a short I ordered another tube from the early television Museum. I had it brought out via Uship and they cracked the safety glass. Should I be able to put the lens from my 21FJP22 on to this tube? I already spoke to them and they want to know how much money to give me back to make my whole. I dont see any cracks on yhe actual CRT thankfully. Also how can I set this up on my CRT tester. My setup guide doesnt have the 21FJP22 or the 19VABP22 listed. I have the right adapter, and I tested the tube with just the 6.3 filament voltage and looked for shorts, it had none but I don't know what to set G1 and G2 to. Can you guys help me?

Last edited by Aperna1985; 05-15-2024 at 01:56 PM.
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Old 05-15-2024, 02:19 PM
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Electronic M Electronic M is offline
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If the 19VABP is a replacement for a 21FBP then the safety glass will interchange. In 1968 the laws for measuring CRT screen size changed from bulb diagonal to phosphors area diagonal so all tubes got relabeled as being ~2" smaller...they were the same as the old standard tubes physical they just got relabeled to comply with law.

This may not be the same for all CRT testers but my B&K 466 and 470 treat all roundy color, most rectangular color, and most monochrome tubes the same as they would 3 different 10BP4 guns shoved into a single envelope.
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Old 05-15-2024, 06:37 PM
Aperna1985 Aperna1985 is offline
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I have the B&K 465, sometimes a tube tests on a G2 voltage of 50 or 75 other times its set to 300, that's more what I'm curious about. I have a little switch that let's me test each gun one at a time.
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Old 05-16-2024, 07:25 PM
Aperna1985 Aperna1985 is offline
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So I didn't realize color tubes were at the end of the book. I just went through in numerical order, and didnt see my tube listed. But today i started searching other models of B&K tester and accidentally found out color tubes were in the back of the book I had. I found that you set the heater to 6.3, use the large adapter unfortunately I don't see a number anywhere on it but it is a 14 pin adapter, then you set G1 to 40. Then set the tester to cutoff and rotate G2 until the needle rests on the cutoff line, at that point flip back to emissions and you have your value. Thankfully the tube tests very strong and all 3 guns are almost exactly equal.

I put the setup information in there just in case someone else couldn't find it.

Last edited by Aperna1985; 05-16-2024 at 07:47 PM.
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