DF 91 = 1 T 4 Vacuum tube Pentode 45 V 1.7 mA Number of pins (num): 7 Base: Miniature Content 1 pc(s) | Conrad.com
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Results page 297, about 'ultrasonic pulse circuit'. Searching circuits at Next.gr
JTL-1T4 / VT-173 (DF91) Pentode. A vacuum tube by Tung-Sol U.S.A. #18275 | M-Ware
Battery Powered Tube Regenerative Receiver
Regenerative Receiver - YouTube
alte Röhre old tube 1T4 = DF91 = W17 = 1K2 = CV785 neu OVP in Mecklenburg-Strelitz - Landkreis - Neustrelitz | eBay Kleinanzeigen
Battery-Powered Guitar Amp
1T4 (DF91) Vakuum-Pentode. Eine Radioröhre. ID19134 | M-Ware
Japanese Antique Vacuum Tube Radios
File:Tube 1T4=DF91.jpg - Wikimedia Commons
CQ CQ CQ de W0VLZ: 1T4 / 3V4 Regenerative Portable
1T4 vintage vacuum tube & 7 pin socket set radio and audio amplifier access item | eBay
1947 One Tube Matchbox Radio | OneTubeRadio.com
1T4 RCA Audio Vacuum Tube Valve - Bangybang
1T4 | UNSORTED | ROHRE Für 5 € HT auf Electols
Vintage Superhet RX
2 valves 1T4 regenerative SW receiver / 2 Röhren Audion - YouTube
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1T4 (DF91) Vakuum-Pentode. Eine Radioröhre. ID19134 | M-Ware
1T4 DF91 Mazda - Cifte France | TUBES.RS | Tube Amplifiers & NOS Tubes
1T4 (DF91) Vakuum-Pentode. Eine Radioröhre. ID19134 | M-Ware
One Tube AM Radio
1T4, Tube 1T4; Röhre 1T4 ID429, Vacuum Pentode | Radiomuseum.org
CQ CQ CQ de W0VLZ: 1T4 / 3V4 Regenerative Portable
1T4 - Vint'Elec - Vintage electronic tubes
