Item Tag : B438

NOS Philips B438 W410 Never Used Holland Made Triode Radio Audio Vacuum Tube

B438 ~ W410. Tube Type: B438 - Directly-Heated RF / IF Triode. Replaceable with slight differences: 2-438, R62, W420, M350S, M504 (among others). A UX4-base version of the B438 also exists. Confirm before any substitution.
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