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Tube Substitutions for:
 1F1
 Ballast Tube (neither FeH or Urdox)
TypeSubstitutesBase Diagram
1F11AE4*, 1AF4, 1AM4, 1T4, 1T4SF, 1AJ4
Notes:* - Parallel filaments
Web References1F1 (NU) @ Franks Electron Tubes
1F1 @ RadioMuseum.org


Type 1F1
Ballast Tube (neither FeH or Urdox)


MECHANICAL DATA
Basing7DP


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