Sony ST-5066 FM/AM Tuner

General:

Around 1975 Sony company came with its 1055 series, high quality amplifiers & tuners on the European market.

 

 

Special futures:

The Sony ST-5066 tuner incorporates special custom Sony transistors as you can see on the schematics.
It has a FM 3 gang varicap on the Alps front-end. It employs 2 fets in the front-end.
It has a standard schematic for stereo reception and FM demodulation is a simple standard 'ratio' diode version.
Also a LF filter block is on the pcb. No provision for Anti-Birdies.
The power supply is simple but effective. The total electronic setup is simple but effective.
It has a hi-blend switchable filter.
AM reception is also an option.
The FM section gives excellent sensivity, good reception even of weak signals and the sound is good.
It is a medium sized tuner: Its made to accompany the amplifiers of Sony like the TA-1066.

 

Inside ^

 

 

Schematic:

Service manual of the ST-5066 in PDF click here
 

 

Modifications:

Electrolytic caps can be replaced and heatsinking of the power supply transistor can be improved.

Set the deëmphasis-compensation to 75 µS in USA and 50 µS in Europe.

Set the tuner to 240V mains in Europe.

Front-end ^

 

Power transformer ^

 

Front ^

Stereo ^

 

Dial ^

 

 

Sound:

This tuner is very sensitive and easy to use, it lacks the more extensive control of most Luxmans.
The sound is great and reception is very good.

 

 

© Hans Hilberink - PE1MMK ® 2001 - Last update: 15-04-2020.