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atwaterkent1
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Post subject: Testing UX-120 Tube on Tube Tester  Posted: May Fri 25, 2018 2:34 am |
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Joined: Sep Mon 18, 2017 2:23 am
Posts: 8442
Location: Plymouth, MI
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I would like to test some UX-120 tubes on my Hickok 600a . The voltage would be the same as 99 tubes, but I haven't found any test data for them. Does anyone have that or know where to find it?
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Dan
Museum Curator
https://roaringtwentiesantiqueradiomuseum.com/
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azenithnut
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Post subject: Re: Testing UX-120 Tube on Tube Tester Posted: May Fri 25, 2018 2:59 am |
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Joined: Jan Mon 18, 2010 2:13 am
Posts: 22875
Location: Dayton Ohio
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Does it list a 20?
-Steve
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Radio Interests
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Consoles and floor models, the bigger, the better!
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atwaterkent1
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Post subject: Re: Testing UX-120 Tube on Tube Tester Posted: May Fri 25, 2018 3:40 am |
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Joined: Sep Mon 18, 2017 2:23 am
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Location: Plymouth, MI
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Bugman
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Post subject: Re: Testing UX-120 Tube on Tube Tester Posted: May Fri 25, 2018 3:44 am |
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Joined: Mar Sat 14, 2009 5:56 pm
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Location: VA 22602
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Here's what I was able to find.
120 3.0 JR-3200-0 71 73 P4 525 OK above 325
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I'm not a hoarder, I'm a caretaker of scarce commodities
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atwaterkent1
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Post subject: Re: Testing UX-120 Tube on Tube Tester Posted: May Fri 25, 2018 3:50 am |
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Joined: Sep Mon 18, 2017 2:23 am
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Location: Plymouth, MI
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wazz
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Post subject: Re: Testing UX-120 Tube on Tube Tester Posted: May Fri 25, 2018 3:05 pm |
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Joined: Jun Wed 08, 2011 2:33 am
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Location: Ohio 45177
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Lucky my Hickok came with the addendum books besides the roll chart. Otherwise alot of these prewar tubes would be a problem.
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busterdog57
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Post subject: Re: Testing UX-120 Tube on Tube Tester Posted: May Fri 25, 2018 5:46 pm |
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Joined: Jul Sun 12, 2015 9:47 pm
Posts: 205
Location: 94502
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If we can look up "20" on the charts and have it apply to the -120 tube, is it also true that to test a -199, we can use the "99" settings?
Thanks.
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Chas
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Post subject: Re: Testing UX-120 Tube on Tube Tester Posted: May Fri 25, 2018 7:05 pm |
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Location: S. Dartmouth MA 02748-1225 USA
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busterdog57 wrote: If we can look up "20" on the charts and have it apply to the -120 tube, is it also true that to test a -199, we can use the "99" settings?
Thanks. Yep, on a 299 too... FWIW, in a pinch a '99 can be used as a sub with reduced output power... B+ and bias changed to suit... Chas
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Last edited by Chas on Sep Tue 21, 2021 8:44 pm, edited 1 time in total.
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busterdog57
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Post subject: Re: Testing UX-120 Tube on Tube Tester Posted: May Fri 25, 2018 8:38 pm |
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Joined: Jul Sun 12, 2015 9:47 pm
Posts: 205
Location: 94502
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Ok, thanks - just tried it on the small pile of 199s I have, using the settings for 99 given by the documentation for my tester. It says to use only 65v on the plate, but isn't the 99 a 90v tube? I ask because some of them show not-so-good at 65 but very good at 90.
My tester is the Heathkit TC-2, which I know is pretty pedestrian...but it's rebuilt and accurate within its design limitations, and all I have right now.
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ymg200
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Post subject: Re: Testing UX-120 Tube on Tube Tester Posted: Sep Tue 21, 2021 4:33 am |
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Joined: Jul Thu 08, 2021 8:50 pm
Posts: 6
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busterdog57 wrote: Ok, thanks - just tried it on the small pile of 199s I have, using the settings for 99 given by the documentation for my tester. It says to use only 65v on the plate, but isn't the 99 a 90v tube? I ask because some of them show not-so-good at 65 but very good at 90.
I have NRI-69 tube tester and the manual for NRI-69 instructs to use load 65 for X-99 and its variants. Does it mean 65V plate voltage? The data below, says that the plate voltage for UX-199 is 22-45V. If that's true, load 65 should not mean 65 volts.
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X-99_data_chart.jpg [ 310.38 KiB | Viewed 365 times ]
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