Circuit diagram for a condenser testing bridge using an induction coil and telephone receiver.
| Identifier | ExFiles\Box 34\1\ Scan311 | |
| Date | 11th August 1922 guessed | |
| Induction coil. Fixed Resistance Dial Resistance reading direct in M.Fd. {Frank Dodd - Bodies} Telephone Rec. X condenser (to test) Std: Condenser .5 M.f.d. TUMBLER SWITCH 12 V | ||
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).