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421A Western Electric (sold out)

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Sorry, this product is sold out!

sold out) 421A Western Electric

(421A=5998 and has slightly higher amplification factor than 6AS7G)
(5998 Tungsol is the next best to the Western Electric 421A, also 7236 Cetron)
(all 421A have spiral wound (pigtail) filament wires)

- Fi 421A amp
- Singlepower Extreme
- Peter Millett
- Alex Ederer SET

See more: vacuum tube

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