Transistor Analyser CT446

Avo (Brand), Automatic Coil Winder and Electrical Equipment Co., Avo Ltd; London

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  • Année
  • 1960 ??
  • Catégorie
  • Appareils de mesure et de dépannage (matériel de labo)
  • Radiomuseum.org ID
  • 119566

Cliquez sur la vignette du schéma pour le demander en tant que document gratuit.

 Spécifications techniques

  • No. de transistors
  • 5
  • Semi-conducteurs
  • Gammes d'ondes
  • - sans
  • Tension / type courant
  • Piles sèches / 14 × 1.5 Volt
  • Haut-parleur
  • - - Pas de sortie basse fréquence
  • De Radiomuseum.org
  • Modèle: Transistor Analyser CT446 - Avo Brand, Automatic Coil
  • Dimensions (LHP)
  • 15.5 x 5.5 x 11 inch / 394 x 140 x 279 mm
  • Remarques
  • Military version of the Avo Transistor Analyser Mk I (Mk 1).
  • Poids net
  • 6.8 kg / 14 lb 15.6 oz (14.978 lb)
  • Source
  • - - Data from my own collection
  • Auteur
  • Modèle crée par Keith Staines. Voir les propositions de modification pour les contributeurs supplémentaires.

 Collections | Musées | Littérature

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Le modèle Transistor Analyser fait partie des collections des membres suivants.

 Forum

Contributions du forum pour ce modèle: Avo Brand, Automatic: Transistor Analyser CT446

Discussions: 2 | Publications: 4

I discovered today that a far better quality schematic diagram can be found when searching for the OPERATING INSTRUCTIONS for the AVO Transistor Analyser Mk. 2.

The Mk. 2 has a mains power supply, but the bulk of the main circuit is identical (apart from a 3rd push switch to select a 150mV sensitivity with the METER SWITCH in position 1.5V.
The handles are also bent sideways, so that the METER and AMPLIFIER connectors are reachable with test leads with normal straight bananaplugs. The handles for the CT446 are straight above the connectors, making them difficult to connect to.

The Mk2 also has 3 pages (without page numbers) with component listings titled FIGURE 7, FIGURE 8 and FIGURE 9, located nearly at the end of the OPERATING INSTRUCTIONS manual. These component listings are referring to the respective schematic diagrams following thereafter.
Just preceeding these component lists are several (numbered) pages that look like being copied from the CT446 model.
As I was looking for the values of the voltage divider R42 and R41, I noticed that R42 is erroneously listed twice on page 32 : see Item No 3 and No 8, while R41 is missing.
On the lists found further down, in FIGURE 9, both resistors R41 and R42 are correctly showing, apparently with correct values.

When servicing the CT446, these lists and schematic diagrams found in the OPERATING INSTRUCTIONS for the Mk.2 can be of great help finding out the component numberings and values for the CT446.
 

Paulus van Os, 06.Mar.25

Weitere Posts (3) zu diesem Thema.

Dear forum members,

The Flemish TV channel VRT broadcasts currently episode 3 of this series.

In the second episode, entitled ARCADIA, Morse a certain moment tries to track a phone call from the kidnapper. They use for this purpose an AVO Transistor Analyser CT446! (and also a Tandberg  tape recorder model 84.)

 

Best regards

 

 

Pièces jointes

Georges Van Campenhout † 28.4.22, 24.Apr.17

Weitere Posts (1) zu diesem Thema.