| Reference number | ACS/1/2/1/515 |
| Alternative reference number | 570 |
| Level | Item |
| Title | Letter from [Alan Archibald Campbell] Swinton, to The Editor, The "Electrician" |
| Date | 7 March 1921 |
| Description | Discussing the functionality of a loud speaking optophone, stating he has recently applied to the optophone a thernionic amplifier of the note magnifying type, used in wireless telegraphy and telephony. Comments on Dr Fournier d'Albe's ingenious instrument, improved and manufactured by Messrs. Barr & Stroud, was fully described in the "Electrician", continuing with an in depth descrption of the amplifiers used. |
| Extent | 3p |
| Format | Typescript |
| Physical description | Carbon |
| Access status | Open |
Fellows associated with this archive
| Code | Name | Dates |
| NA8285 | Swinton; Alan Archibald Campbell (1863 - 1930); electrical engineer | 1863 - 1930 |