testing C16J tubes
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  1. #1
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    Default testing C16J tubes

    Is there a way to test these tubes without some official tube testing machine? I have one in my modular 10ee that looks bad, and whenever I try to turn it on, it blows the 30 amp fuses in the disconnect box. So I definately need to see if there is some way to test it to make sure it is the bad one.

    Dale Nelson

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    Quote Originally Posted by swellwelder View Post
    Is there a way to test these tubes without some official tube testing machine? I have one in my modular 10ee that looks bad, and whenever I try to turn it on, it blows the 30 amp fuses in the disconnect box. So I definately need to see if there is some way to test it to make sure it is the bad one.

    Dale Nelson
    Best possible "tester" is an otherwise functional 10EE.

    Presume you have swapped the two, and also tried with the "suspect" one OUT of the circuit, and that the breaker trips only with that tube IN, and either position.

    Your 10EE having spoken, swear out an affidavit to that effect, have it witnessed and notarized, file it with the Recordation section at your County Courthouse, pay the modest fees.

    And "it's OFFICIAL" that it is the "bad one".

    A faulty vacuum tube is only a misdemeanor, if-even, given the extenuation and mitigation of age, fer hem's sake.

    They do not ordinarily justify empanelling a Grand Jury when they succumb to old age and misfortune.

    "Impeachment" and removal from orifice, OTOH?

    Now that you CAN do. See plug-in solid-state replacements.

    Last edited by thermite; 02-04-2020 at 07:26 PM.

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    Most common way to test a tube was to replace it with a known good one. Your problem is that you probably don't have a known good one and there is the possibility that the tube is not at fault but rather something down the line. Disconnect the output lead and see if the problem goes way. OK? Go to the next point and keep going until either the defective component is found or it is determined that the tube is at fault.

    Tom

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    Shorted tube usually does not pull the mains.

    Shorted cap however...

    Locate a wiring diagram and locate connection points that can remove sections of the circuit.

    Sent from my SAMSUNG-SM-G930A using Tapatalk

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    I have been told that Monarch will test tubes. Don't take my word for it, call Monarch. If you ship it to them, wrap it in several inches of the non woven padding often used in pillows. Remember to tie the ends of the roll so the tube can't slip out against the box.

    The concept here, which seems so difficult for people to understand, is that the tube must be able to move in the padding, which for a light item like the tube must be very soft. When you jump off something, you land with your legs flexed so you gradually decelerate to a stop. In a drop, the tube must compress the padding and come to a gradual stop.

    When buying tubes for my collection, the sellers invariably say that they will wrap it in bubble wrap and fill the box with peanuts. They might as well just drop it in a box because that packing is far too stiff for something with a large area compared to its weight.

    Bill

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    Quote Originally Posted by 9100 View Post
    I have been told that Monarch will test tubes. Don't take my word for it, call Monarch. If you ship it to them, wrap it in several inches of the non woven padding often used in pillows. Remember to tie the ends of the roll so the tube can't slip out against the box.

    The concept here, which seems so difficult for people to understand, is that the tube must be able to move in the padding, which for a light item like the tube must be very soft. When you jump off something, you land with your legs flexed so you gradually decelerate to a stop. In a drop, the tube must compress the padding and come to a gradual stop.

    When buying tubes for my collection, the sellers invariably say that they will wrap it in bubble wrap and fill the box with peanuts. They might as well just drop it in a box because that packing is far too stiff for something with a large area compared to its weight.

    Bill
    That will work unless USPS runs over it with a vehicle which I have had done several times.

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    Here is a link to data sheet

    http://www.farnell.com/datasheets/20...874.1554745413

    Shows filament current 31 amps

    You can replace the tube with solid state replacement

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    Quote Originally Posted by Pathogen View Post
    Here is a link to data sheet

    http://www.farnell.com/datasheets/20...874.1554745413

    Shows filament current 31 amps

    You can replace the tube with solid state replacement
    Yes, if the tube is bad. However, if the problem lies elsewhere, then the shiny new replacement might go bye-bye. Remember that the old tube technology is more abuse resistant than solid state. Better to find the cause and fix before replacing expensive parts.

    Tom

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    Quote Originally Posted by labeeman View Post
    That will work unless USPS runs over it with a vehicle which I have had done several times.
    I hate to say it, but I have changed to UPS. The US Post Office has gone downhill to the point that I can't afford the losses. The last time I sold a bunch of tooling on EBAY and shipped USPS, they lost two of the packages.

    Bill


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