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https://www.radiomuseum.org/r/jewel_ele_pattern_210.html
Model: Jewell Tube Tester Pattern 210 - Weston Electrical Instrument: Material: Leather / canvas / plastic - over other material : Shape: Tablemodel, with any shape - general. Notes: A.C.-D.C. Tube Tester Jewell Pattern 210. Price in first year of sale: 65.00 $ Mentioned in: Radio Engineering (October 1929, Vol. IX, No.10, page 15) Literature ...Notes: A.C.-D.C. Tube Tester Jewell Pattern 210.
https://radioattic.com/item.htm?radio=1160046
Nice vintage Jewell radio test set and tube tester. Looks to be pretty complete in original leather case. Interestingly you can test the tube as it perform in the radio's circuit. It has a plug that plugs into the tube socket in the radio.
https://www.ebay.com/itm/303977013101
This tester is made to test tubes in-circuit by removing the tube from the radio and inserting it into the tester while inserting the tester plug into the empty radio socket. Then applying power to the radio. Please see photos for details. Dimensions: 14" x 14" x 7" & 7 lbs.Seller Rating: 96.7% positive
https://www.antiqueradios.com/forums/viewtopic.php?p=2865586
Prior to WW-2, Sylvania farmed out production of its drugstore and repair shop tube testers to companies like Jewell and Weston. So what you have there is undoubtedly a piece of equipment that was engineered by Sylvania and probably sold by them through its tube distribution network, made by Jewell.
https://www.antiqueradios.com/forums/viewtopic.php?t=3089
Jewell Tube Tester : Page 1 of 1 [ 3 posts ] Previous topic Next topic : Author Message; Uffda Post subject: Jewell Tube Tester. Posted: Aug Sun 07, 2005 4:40 am . Member: Joined: Jan Thu 01, 1970 1:00 am Posts: 1172 Location: Bloomington, MN, 55425
https://www.ebay.com/itm/1930s-Jewell-Tube-Tester-1194-/303813803503
This is a 1930's Jewell Model 199 In-Circuit Tube Tester.End date: Dec 26, 2020
https://troutunderground.com/Tube-Testers-Electrical-Tube/
This old tube tester was acquired from an estate that belonged to a retired NASA engineer. Tester was lovingly cared for and stored for years. Unit very clean with only minor wear to panel. Knobs/switches, no corrosion to electronics or chassis. Appears to be all original except for a newer 3 prong power cord.
https://antiqueradioschematics.org/testequipment.htm
manual includes operating instructions, tube data sheet and schematic for Triplett 2413 and and Triplett 3212 tube testers. 21 pages, includes settings for many early 4 pin tubes. Increase the value of your tube tester with a printable download of the original instructions and the tube data sheet! Only $5.95. More Triplett/Readrite Data.
https://troutunderground.com/Tube-Testers-Weston-Model/
Order No. CA-50-2413 dated June 23, 1950 This is a high quality mutual conductance tube tester built to high government standards. It is of the two-transformer design whereby one transformer supplies operating voltages for the tube tester. The second transformer supplies filament (heater) current for the tube being tested.
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