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Amperex 7308 / E188CC - preamp grade, matched pair

Amperex 7308 / E188CC - matched pair
Price: $179.00
1 matched pair in stock
Item Number: 943
Manufacturer: Amperex
Description

The 1960s Amperex JAN 7308 tubes in this precisely matched pair are premium quality 6DJ8 / ECC88 tubes. The labels on the glass are missing and the New York factory codes are etched in the glass.
 
Both tubes have the following characteristics:
  • creases on top of the bottles
  • gray risers
  • round shield with two raised rectangular sections on opposite sides
  • large O getters with wide support
  • gold pins
Testing

Both tubes test as new with balanced sections. They are matched for both current draw (mA) and transconductance (Gm) on each triode section. These tubes are screened for gas, heater-cathode leakage, shorts, and excessive noise and microphonics. They are tested at typical operating voltages on a laboratory grade Amplitrex AT1000 (manual setting, fixed bias mode). Learn more about our testing process here.

Noise and microphonics

These tubes test as “preamp grade” on our custom noise testing equipment. They are an excellent choice for sensitive applications such as preamplifiers.
 
Pricing

These tubes are sold as a precision matched pair. Tubes ship in new white boxes with test results for current draw (mA) and transconductance (Gm) for each triode section. Singles, when available, are listed as Item 787.

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TC Tubes specializes in precision testing and matching of vintage and new production vacuum tubes for guitar & bass players, audiophiles, and DIY tube audio enthusiasts. Our website features secure payment options and fast, convenient shipping around the world.

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