| 摘要 |
<p>325,535. Clarke, H., and Gramophone Co., Ltd. Nov. 17, 1928. Electric circuit arrangements for amplifying.- The output of a gramophone pick-up is delivered through a pentode valve to a loud speaker, no additional amplifier being provided. The input is led through a transformer 8 to the grid 1 of the valve, which delivers through a transformer 7. The auxiliary grid 5 is maintained at a potential in relation to the filament 12. Specification 267,958, [Class 40 (v), Wireless signalling &c.], is referred to.</p> |
