Comet CA-3300 amplifier

 

General:

Around 1975 issued amplifier for European markets made by 'Comet Electro / Cometro Electronics' company Japan.

 

Front ^

Nice solid metal front with solid metal knobs ^

Front without wood case ^

 

Owners manual:

not yet available, do you have one? mail me.

 

interior, very well built and very good pcb ^
 

Special futures:

There are models of this kind amplifier with RCA input/output sockets.
Light and small footprint amp. Wood case. Well build and good parts used.
This amp employs all silicon transistors.
 

Specifications:

Distortion (THD 20Hz - 20kHz) < 0.1% at continuous output per channel: 10 Watts RMS per channel.
Speaker impedance: 8~16ohms
Signal/noise ratio: 85dB power amp. section
3 x DIN input.

 

Power transistors ^

 

Schematic:

Click here to download the schematic in PDF format

 

Modifications:

This amp was originally designed for the use of TO-66 power transistors, as you can see in this model there is a pcb added
on the heatsink for the use of plastic power transistors, something you see very often in this kind of designs.

You may replace some diodes, capacitors and resistors in the power supply and power rail.
After modification this amp is capable of producing 2x 15 Watts RMS.

 

interior after update ^

 

Cometro company Japan.

 

Sound:

The sound is very good for such a small amplifier.

 

© Hans Hilberink - PE1MMK ® 2003 - Last update: 11-05-2016.