Crystal de Luxe Radio Ei, Elektronska Industrija; Niš - see also RR
vacuum tube - Wiktionary
Dioda – Wikipedie
PY 88 = 26 AE 6 Vacuum tube Switching diode 250 V 220 mA Number of pins (num): 9 Base: Noval Content 1 pc(s) | Conrad.com
Elektroncső EBC 91 = 6 AV 6, pólusszám 7, Kettős dióda - trióda > inShop webáruház
Kelco - Detalji proizvoda - RK 9451 Elektronska kocka sa 9 LE Dioda
Brand New Psanve HiFi EL34C Vacuum Tube EL34 Valve Electron Power Lamp for Vintage Audio Amplifier DIY for Original Factory|Speaker Accessories| - AliExpress
Dioda – Wikipedija
Dioda - Wikipedia
EBC 91 = 6 AV 6 Vacuum tube Double diode triode 250 V 1.2 mA Number of pins (num): 7 Base: B7G Content 1 pc(s) | Conrad.com