진공관) Penta 4-400A Vacuum Tube – High Power 400Watts, RAYTHEON – 근대통신박물관
Amplifier Construction
Röhre Tube 4-400A EIMAC / JAN-8438 Amateurfunk in Nordrhein-Westfalen - Windeck | eBay Kleinanzeigen
8438 Eimac Made in USA Vintage Power Tetrode Tube 4-400a Qb4/1100ga Cv3879 for sale online | eBay
Amperex 4-400A = 8438 Radial-Beam Power Tetrode
4-400 Tube Curio Lamp - YouTube
4-400A, Tube 4-400A; Röhre 4-400A ID21383, Transmitting Tetr | Radiomuseum.org
electron Tube Data sheets - 4
4-400A / JAN-CIM, Eimac, Transmit Tube, Clean Used, Pullout. Low Hour
A 4-400A amplifier for c.w., s.s.b. or a.m.
Tube 4-400A / 8438 / QB4/1100GA / RS 1002 A
Absolute Auctions & Realty
EIMAC Transmission Tube 4-400A/8438 | RF BroadCast
Vacuum Tubes: Transmitting & Receiving: "4"
A 4-400A amplifier for c.w., s.s.b. or a.m.
Search results for: '4-400'
4-400A-EI Transmitting Tube, Glass Envelope, MFR: Eimac (N.O.S.), 90 day or 2200 hrs, prorated
Eimac 4-400A Tetrode Tube Spec Sheet
4-400A-AMP Transmitting Tube, Broadcast / Industrial, 4-400A / 8438 / QB4 / 1100GA, MFR: Amperex (NOS)
A 500 Watt Output 4-400A Linear Amplifier For 600 Meters
A 500 Watt Output 4-400A Linear Amplifier For 600 Meters
A 500 Watt Output 4-400A Linear Amplifier For 600 Meters
