Home
Resources
References
Tubes
Forums
Links
Support
Sale
Tube Substitutions for:
ECH21
Triode-Heptode
Type
Substitutes
Base Diagram
ECH21
ECH71
, X143, MECH21, TH1_BBC
Web References
ECH21 (Tesla) @ Franks Electron Tubes?
ECH21 @ Radiomuseum
© 1996-2021 Nostalgia Air