Vacuum Tubes Inc

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QUOS- 231

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  • QUOS- 231


Used old stock type 31 4 pin triode. The earliest version has a T-9 tubular bulb, but later tubes (up to 1932) have S12 globe bulbs. The photo shows both types. Which we supply is limited to the stock on hand. Various brands. Contact us if the bulb shape is important to you.

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