LUXMAN vintage audio
Sony ST-5066 FM/AM Tuner
Around 1975 Sony company came with its 1055 series, high quality amplifiers & tuners on the European market.
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.
Service manual of the ST-5066 in PDF click here
Electrolytic caps can be replaced and heatsinking of the power supply transistor can be improved.
Set the deėmphasis-compensation to 75 µS in USA and 50 µS in Europe.
Set the tuner to 240V mains in Europe.
Power transformer ^
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.