Home / Shop

38 Vacuum Tube New and Used

$4.00
38 Vacuum Tube New and Used
38 Vacuum Tube New and Used

Home / Shop

38 Vacuum Tube New and Used

$4.00
Model Number: 38NEW
Type 38 5-pin power amplifier pentode tube with top cap for vintage auto and battery radio receiver circuits. Available in new and used condition.
Missing Option: Options
Loading Available Options
Maximum quantity exceeded
Minimum purchase amount of 1 is required
Maximum purchase amount of 4 is allowed
Your Price: $4.00
4.000
A one-time price of $4.00 will be added to your order.
1 Left in Stock
Maximum purchase amount of 4 is allowed
Categories: Vacuum Tubes and Accessories
Manufacturer: Multiple Manufacturers
Facebook
X
Email
Pinterest
  • Description
  • Specifications

The Type 38 (originally designated UY-238 or CX-338) is a 5-pin grid-cap indirectly heated power amplifier pentode designed for audio output stages in early 6.3-volt automobile and battery-operated radio receivers. Introduced by RCA and Cunningham in 1931, it features a 6.3-volt heater and pentode construction engineered to deliver efficient audio output at modest plate voltages supplied by battery sets.

  • Tube Function: Power Amplifier Pentode

  • Base Design: 5-Pin Standard Base (UY5 / S5A) with Top Control Grid Cap

  • Glass Shape: ST-12 or Globe (S-12)

  • Heater Voltage: 6.3 Volts AC / DC

  • Heater Current: 0.3 Amps (300 mA)

  • Maximum Plate Voltage: 135 Volts DC

  • Maximum Screen Grid Voltage: 135 Volts DC

  • Amplification Factor (Mu): 110

  • Transconductance: 950 micromhos

  • Typical Power Output: 0.5 Watts (at 135V Plate/Screen)

  • Cathode Heating Method: Indirect (Unipotential)