| ??? 08/31/12 07:03 Read: times |
#188204 - Tubes as in Mullard EL34s Responding to: ???'s previous message |
Yes, it's got a pair of EL34 pentodes in parallel as the pass elements with 10 ohm resistors in the cathodes to share the current. The schematic shows the top grid connected to the cathode, the middle grid connected to a fixed bias about 270V above the cathode and the bottom grid connected to the error amplifier.
The filaments light up. |
| Topic | Author | Date |
| Repairing old kit, any advice? | 01/01/70 00:00 | |
| "Suddenly" ? | 01/01/70 00:00 | |
| Perhaps Current Limiting | 01/01/70 00:00 | |
| More info | 01/01/70 00:00 | |
| for those of us that ... | 01/01/70 00:00 | |
| Voltage-controlled | 01/01/70 00:00 | |
| pentodes? Tubes? (Valves?) | 01/01/70 00:00 | |
| Tubes as in Mullard EL34s | 01/01/70 00:00 | |
| One last bit of advice | 01/01/70 00:00 | |
| Old electrolytics | 01/01/70 00:00 | |
| well, in lieu of a scope .... | 01/01/70 00:00 | |
| Last | 01/01/70 00:00 | |
| The problem isn't with the "old gear" ... | 01/01/70 00:00 | |
| Good hunch, then | 01/01/70 00:00 | |
| Update, not the electrolytic.. | 01/01/70 00:00 | |
| 01/01/70 00:00 | ||
| ebay | 01/01/70 00:00 | |
| Or just the Mullard | 01/01/70 00:00 | |
| Anyone got an EL34? | 01/01/70 00:00 | |
Here you go... | 01/01/70 00:00 |