Tungsram

PCC189 / 7ES8

12.00 USD

Fine low noise double triode miniature glass amplifier tubes manufactured by Tungsram. These 9 pin tubes feature variable mutual conductance for VHF amplification in TV tuners. They come with short gray plates, top halo getters, and are printed in yellow with Tungsram logo, TUNGSRAM PCC189 and variable two letter codes. Boxes are standard Tungsram red and blue, printed PCC189.

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.