Product Details:
Tung−Sol HF300 Audio amp or RF amp. Newer sub for a 204A, 200w plate dissipation, 11v − 12v filament @ 4 amps, 3"D x 10" overall length, New, unsed. Only one available. (PDF)

For a $6 up charge ($5 for 20 tubes or more of same number), individual Roe Tester V10 printouts with curves will be included with individual tubes. This test takes about 10 minutes for each test. The calibrated ROE Tester is the finest test tube testing system available. It will document every operating parameter of the subject tube.