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Tempofoon TFT-400 AM/FM tuner (construction)

 

General:

Generously build FM stereo tuner with excellent performance made by "Comet Electro", "Cometro" Japan.

 

Special futures:

Also sold under the brandname "Vendomatic" and other names.

The tuner has a much better IF section with a high-quality, low distortion IF Murata ceramic filter.
With two, at the time ultra modern, Toshiba IF-ICs for low noise.

 

Vendomatic version with different cabinets ^

 

User Manual:

Click here to download the service manual PDF format

 

Front ^

 

Interior ^

 

FM front-end with 3 gang var.capacitor one 1st stage FET and 2x VHF transistors 1 amp, 1 osc. ^

 

Schematic:

construction.

 

FM + IF + Multiplex + PS + final-Audio ^

 

FM IF stage at 10.7 MHz, with 2x TA7061 Toshiba IF-IC and the Murata ceramic filter. ^

 

Comet FM-IF pcb solderside ^

 

Comet FM front-end pcb ^

 

Modifications:

Many electrolytic caps can be exchanged when out of specs. Lamps can be exchanged for LEDs.
Some AC lamp-wiring can be twisted.

 

AM section ^

 

Power supply ^

 

Sound:

This tuner sounds excellent.

 

Matching Tempofoon amplifier ^

 

 

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© PE1MMK Hans Hilberink last update: 15-07-2021.