Sylvania

E188CC / 7308

88.00 USD

7308 / E188CC manufactured by Sylvania in USA or England in pristine condition, with gray plates and top round getter. They are printed in yellow or green SYLVANIA 7308 USA/ENGLAND. One of the best sounding substitutes for 6DJ8. Life Test = 10,000 hours, Mechanical Quality = Shock and Vibration resistant. Boxes are standard Sylvania yellow and black printed 7308. Photo is typical of available inventory.

Condition

New Bulk
New Old Stock (New in box)

	Tube Matching 6.00 USD by tube
LEARN MORE WHY ? A tube may have one, two, or three internal sections depending on the purpose of the tube; somtimes these sections are all the same, sometimes they are different. Due to manufacturing and material tolerances, there may be slight differences between the original specification and the actual tube. Tube matching tests each one of these internal sections and selects tubes, compared to original specifications at manufacture, for balanced performance and good sound. HOW ? All our tubes are tested by us prior to packing on our Stark, AVO, Simpson or RF Laboratories Inc. calibrated testers. On request for tube matching, tubes are matched for Mutual Conductance in Micromhos and Plate Current in Milliamps on our Amplitrex or Radioelec Duovac testers, with results printed for each individual tube. Certain tubes difficult to test are matched for Mutual Conductance in Micromhos only on one of our regular calibrated testers. On request we can also test for Microphonics.