Crystal Detector
Teleradio Company, The, (Edmonton) Ltd; London
- Pays
- Royaume Uni
- Fabricant / Marque
- Teleradio Company, The, (Edmonton) Ltd; London
- Année
- 1923 ??
- Catégorie
- Poste à détecteur (diode ou cristal, pas de lampes)
- Radiomuseum.org ID
- 238352
- Principe général
- Détecteur à galène ou semi-conducteur
- Circuits accordés
- 1 Circuits MA (AM)
- Gammes d'ondes
- PO uniquement
- Tension / type courant
- Pas d'alimentation nécessaire
- Haut-parleur
- - Pour casque ou amplificateur BF
- Matière
- Matériaux divers
- De Radiomuseum.org
- Modèle: Crystal Detector - Teleradio Company, The,
- Forme
- Modèle de table générique
- Remarques
-
We received pictures of this rare crystal detector from guest Knud Jensen, Danmark (knudsoldradio.mono.net). He seeks help for knowing which model this was and in which years this model was built. His has the "App. No." 267 and the word "App." seems to me not really specific for an US model. Can still be an export model - if the logo is the same ... Who knows more and can help via contact form at the bottom link "Contact"?
The use of a plug-in Detector appears unlikely for a British Product. It is found on imported models from the Continent which were license produced (or branded/distributed) in UK, e.g. the Knivetown Friho Crystal receiver.
In USA the plug-in Detector was unknown. Hence most probably the country of manufacture was in Continental Europe (Scandinavia? Germany? ore else?):
- Source extérieure
- Knud Jensen, Danmark
- Auteur
- Modèle crée par Ernst Erb. Voir les propositions de modification pour les contributeurs supplémentaires.
- D'autres Modèles
-
Vous pourrez trouver sous ce lien 2 modèles d'appareils, 2 avec des images et 0 avec des schémas.
Tous les appareils de Teleradio Company, The, (Edmonton) Ltd; London
Contributions du forum pour ce modèle: Teleradio Company,: Crystal Detector
Discussions: 1 | Publications: 3
The question is if this set, found in Europe (Danmark), was made in the USA or in Europe.
For Europe I found a company Teleradio which seems to be founded after WWII.
But I found also an entry in
"The London Gazette", 23 December, 1941, page 7286, entry number 264, which reads: "IZZARD, Arthur Thomas (carrying on business as The Teleradio Company), of 157,
Fore Street, Edmonton, in the county of Middlesex. RADIO and WIRELESS SPECIALIST, now a Pilot Officer in the Royal Air Force. Date of Order—Dec. 18, 1941. Court—EDMONTON.
No. of Matter—W.2767-"
This still does not answer the question why it shows "App." which is unuasual for a British name plate. On the other hand the socket of the coil is typically British - but also true for the USA products.
See this article (mainly in German, but see the pictures and also text in English). For coils, Edison-Bell (7) had a slightly other socket, but see for instance DeForest (10). As far as I know, in Germany (App. would be true for German), there were always two equal pins as show at least the first 4 photos. The same you would find in France, where you would also write "App. No".
Who knows more and sends us a contact form please?
Ernst Erb, 11.Jul.13