| File | File in archive | Date | Context | Size | DLs | Mfg | Model |
| LatestSchematic.pdf | LatestSchematic.pdf | 01/07/20 | ... +404 (5U4G) ... | 32 kB | 2 | . Various | LatestSchematic |
| 5U4G.pdf | 5U4G.pdf | 22/04/05 | ... 5U4G Full-Wave Rectifier ... | 34 kB | 1193 | *** | 5U4G |
| calstan_223_set.pdf | calstan_223_set.pdf | 09/08/20 | ... 6 B 23
5U4G 5.0 B 1 ... | 33 kB | 7 | Calstan | calstan 223 set |
| Airline_05BR-3021_Sams_150-3.pdf | Airline_05BR-3021_Sams_150-3.pdf | 04/09/18 | ... V 20
5U4G 350VD ... | 8046 kB | 23 | Airline | 05BR-3021B, 05BR-3024B, 05BR-3027A |
| provavalvole.pdf.zip | provavalvole.pdf | 09/10/14 | ... Diodo 3 5T8 Triodo 5U4G Diodo 1 5U4G Diodo ... | 2926 kB | 153 | Scuola radio elettra Torino | Provavalvole |
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