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3 Vintage Sylvania 50B5/A4388 Miniature Tetrode Audio Output Valve - BangyBang Tubes

Brand

Sylvania (diff. year box)

Model

50B5

Type                                         

Tetrode

Use
Output stage 

Similar/Equiv

Octal Based 50L6

Condition

New in Box (NOS)

Tubes per listing

3

 

50XXX