QB4/1100 4-400A Adzam Electron Tube Valve

8438 Eimac Made in USA Vintage Power Tetrode Tube 4-400a Qb4

QB4/1100 @ The Valve Museum

QB4-1100

Oldtube-PriceList

PL-4-400A Penta Labs Transmit Tube for Broadcast / Industrial , New Old Stock

PL-4-400A Penta Labs Transmit Tube for Broadcast / Industrial (NOS)

Vacuum Tubes: Transmitting & Receiving: 4

Oldtube-PriceList

Electron Tube (13)

electron Tube Data sheets - Q

Up for Sale is 1 Matched Quad 4 Pcs, Actual Brand : GZ37 CV378 Mullard, O Getter, Made in Great Britain, Brown Base , Clear Glass, New in White

GZ37 VACUUM MULLARD TUBE RECTIFIER Made in GT.Britain tested 1 Pc

QB4/1100GA - JAN 4-400A With Ventilated Base NOS Philips Valve