3 x 5963 RCA Tubes *Black Plate - D*Low/uneven Testing*

Description: ***Most people test these as a 12au7 but the test is different*** 3 x 5963 RCA Tubes Made in USA Long Black Plates D or square Getter These may or may not work for your application The lettering is smudged/missing ***The auction is for 3 tubes Tested on enhanced Triplet E3444 Laboratory Tester prepared by Paul Hart of Roswell Ga. Results=1900/2400 micromhos @ 5.3/5.8 mA2900/1600 micromhos @ 6.7/4.2 mA2250/1500 micromhos @ 5.6/4.2 mA Bogey(100%) = 3200/3200 micromhos @ 8.5/8.5 mA +/- 10% The measurements in this listing were taken on a Triplett 3444 modified to test the tube as an amplifier in accordance with RMA/EIA specifications, utilized by all US and most foreign tube manufacturers. This tester applies test conditions for this tube as shown below (including the precise filament voltage) and then measures transconductance (gm) in accordance with the engineering definition of gm. Tubes may also be operated under the test conditions for extended periods to be sure that it is stable. A tube must be tested in this manner to compare its test results with the manufacturer’s original intent or with other tubes of the same type. Most tube testers do not apply the test conditions required or conduct a valid gm test. For more details on the test and our test equipment, please contact us.The test conditions for this listing are__67.5_Volts plate, __67.5_Volts screen, ___0___Volts bias or Cathode resistance*What were your tubes tested at? I do combine shipping

Price: 19.99 USD

Location: Morganville, New Jersey

End Time: 2024-12-09T04:29:30.000Z

Shipping Cost: 7.75 USD