Miniature glass pentode tubes manufactured in Holland by Philips Miniwatt. These pristine 7 pin tubes are designed as combined detector and voltage amplifier for FM radio receivers. They come with sliver plates, top getters, and are printed in white INDUSTRO 6BN6 and coded 4038. They are in white boxes printed 6BN6 with Industro logo.
Miniature glass pentode tubes manufactured in Holland by Philips Miniwatt. These pristine 7 pin tubes are designed as combined detector and voltage amplifier for FM radio receivers. They come with sliver plates, top getters, and are printed in white INDUSTRO 6BN6 and coded 4038. They are in white boxes printed 6BN6 with Industro logo.