Transistor Analyser CT446
Avo (Brand), Automatic Coil Winder and Electrical Equipment Co., Avo Ltd; London
- Country
- Great Britain (UK)
- Manufacturer / Brand
- Avo (Brand), Automatic Coil Winder and Electrical Equipment Co., Avo Ltd; London
- Year
- 1960 ??
- Category
- Service- or Lab Equipment
- Radiomuseum.org ID
- 119566
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Transistors
- 5
- Semiconductors
- Wave bands
- - without
- Power type and voltage
- Dry Batteries / 14 × 1.5 Volt
- Loudspeaker
- - - No sound reproduction output.
- from Radiomuseum.org
- Model: Transistor Analyser CT446 - Avo Brand, Automatic Coil
- Dimensions (WHD)
- 15.5 x 5.5 x 11 inch / 394 x 140 x 279 mm
- Notes
- Military version of the Avo Transistor Analyser Mk I (Mk 1).
- Net weight (2.2 lb = 1 kg)
- 6.8 kg / 14 lb 15.6 oz (14.978 lb)
- Source of data
- - - Data from my own collection
- Author
- Model page created by Keith Staines. See "Data change" for further contributors.
- Other Models
-
Here you find 82 models, 79 with images and 41 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Avo (Brand), Automatic Coil Winder and Electrical Equipment Co., Avo Ltd; London
Collections
The model Transistor Analyser is part of the collections of the following members.
Forum contributions about this model: Avo Brand, Automatic: Transistor Analyser CT446
Threads: 2 | Posts: 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
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
Attachments
- Endeavourkopie (59 KB)
- Tandberg 84kopie (65 KB)
Georges Van Campenhout † 28.4.22, 24.Apr.17