gc block,lm3886 inverting

[digi01]

I made them for my synth keyboard.
for the music instrument,I want the device small,easy socket,easy carry.so the block is 6.5mm stereo input and output.alum casing for heatsink.

zang

 

[digi01]

another one.

 

[digi01]

rear.

 

[kuldeepsingh]

How about heat sink temperature rise with normal use?
I personally feel the heatsink is too small for 2 Lm3886s, unless you put a small cooling fan.

 

[digi01]

the heatsink install on the aluminium chassis.the temperature is usually around 40 degree.I can touch the sink.

P.S.
The power supply is 2*18VAC.the loudspeaker is 6 ohm.

 

[AndrewT]

and how hot are the chipamp internals?

 

[digi01]

i think it is under 60 degree