6sn7 tube gt Marconi Italy tubes amplifier preamp b65 vt-231 ecc33 33s30 valve
Specifications
| Return Shipping Will Be Paid By | Buyer |
| All Returns Accepted | Returns Accepted |
| Item Must Be Returned Within | 30 Days |
| Refund Will Be Given As | Money Back |
| Brand | Marconi |
| Type | Preamp Tubes |
| Unit Type | Unit |
| Model | 6sn7 gt |
| MPN | 6sn7 gt |
| Country/Region Of Manufacture | Italy |
6sn7 tube gt Marconi Italy tubes amplifier preamp = b65 vt-231 ecc33 33s30 Made in Italy original Genuine Vintage sound from 1950's ( 1 piece = 1 tube = one vacuum tube = 1 valve ) VALVE grey PLATE squared GETTER BOTTOM RUGGED PLATE BIG LARGE PLATES black thick BASE tested strong 110/110 on TV7DU ( reference good 50/50 ) D getter Double triode Socket Octal K8A Filament Heater Vf 6.3 Volt / If 0.6 Ampere / Indirect / Parallel, ~ = (AC/DC) The 6SN7 was used as an audio amplifier in the 1940-1955 period, usually in the driver stages of power amps. The designer of the famous Williamson amplifier, one of the first true high-fidelity designs, suggested use of the 6SN7 (or B65) in his 1949 revision since it is similar to the original circuit's L63 (= 6J5 ) British single triodes, four of which were used in each channel of his 1947 circuit. VERY RARE TUBES VALVES FOR PRE AMPLIFIER PREAMP DRIVER box 77