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Rotel RA-210 Amplifier


 

General:

 Small amplifier with moderate power capability.

 

Specifications:

 

Special futures:

This little GEM is a real nice amp, well built, cheap at the time it was issued, very nice sound and good parts used by Rotel.

Some amps had the REC logo and others the Rotel name on the front.^

 

User Manual:

not available.

Interior: the updated power amp ^

 

Schematic:

Click here to download the Rotel RA-210 service manual in PDF format

 

Interior ^

 

Modifications:

Some capacitors should be checked and the power supply rail should be updated to modern standards.

On the photos you can see how I did the update. If you are in Europe set the mains voltage to 240 V:

After the upgrade my amp had 2 x 12 Watts RMS power output.
The most significant limitation of this amp is the relatively small dimensioned power transformer.

The open amp ^

Adjusting the amp ^ The idling current and the DC-offset of the power amp section should be checked and readjusted.

The RIAA amp section: a traditional 2 transistor setup. ^

 

Final update interior ^
 

Original back panel ^

Updated back panel ^

 

Sound:

Exceptional for such a small footprint and low powered amplifier.

 

 

 

© PE1MMK Hans Hilberink, 2003,  last update:  17-05-2014.