the Moon for six pence

[U130421]

The pins of the IC are very thin , pins 3 to 10 must be doubled by 1mm thick wires solderd on alternate side by using a piece of sand paper isolating the pin while soldered . The wires to be long enough to reach destination along the pcb track .
This amplifier teaches a 300b how to sing 70hz and above .
Kokoriantz

 

[anti]

Clever bias hacking ...

 

[marconi118]

Does it work with other chip amps for example bridged lm3886?

 

[marconi118]

is it possible to use other chipamp (LM3886) in this class A bias?

 

[Panelhead]

Try a pair of brass scres and washers to attach the chip to the heatsink.
The circuit is interesting. How hot does it run?

 

[U130421]

This circuit requires double bridged amp. I have class A version of 2x LM3886 .30WATT class A Phoenician amplifier . There is also another one much older using offset bias.

 

[marconi118]

Could you elaborate further?
The Phoenician is a bit complex for me