Sylvania

7C6 CHROME TOP

21.00 USD

Best quality double diode triode amplifier tubes manufactured in the United States by Sylvania. These beautiful 8 pin loctal based glass tubes, designed as combined detector and high-gain amplifier for radio receivers, come with chrome tops and are glass etched 7C6 DOB. They are printed in yellow with Sylvania logo, SYLVANIA MADE IN U.S.A. and coded 052 indicating 1952 production. Boxes are standard Sylvania green and black printed 7C6.

Condition

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.