Greg Ball GB150 based Class A amplifier boards and power supplies.

[Tony D.]

Greg custom built these Class A boards for me a few years ago. I had planned to use them to drive an open baffle project but we moved into a town house, that project was abandoned and I put the boards in a closet. I was looking for some bits yesterday and I found the boards/power supplies and thought someone might be able to use them. One power supply is assembled and one is not.

$100 USD plus shipping from V9P 1B5.


Tony

 

[cliffforrest]

To avoid future problems for you and a buyer, please note that these amps are NOT class A!

I have a pair and they are very good; low noise, low distortion and sound great. But they are biased in normal class B, if with a relatively high Iq.

 

[Tony D.]

Okay, but at the time I ordered them I requested that Greg assemble them as Class A output and he assured me that they were.

 

[cliffforrest]

I don't want to rain on your parade in the least, but heat-sinking for class A (what power output and rail voltages?) is a major problem with just a pair of lateral mosfets on such a small assembly.

 

[Bigun]

I remember there were discussions on his forum about operating his amplifier in class a and a number of experimenters increased the bias and by using larger heat sinks were able to operate in class A. I think whoever buys these modules is likely to be somebody who has enough experience to work out those details. They can also be rebiassed to aB.

 

[Tony D.]

I remember there were discussions on his forum about operating his amplifier in class a and a number of experimenters increased the bias and by using larger heat sinks were able to operate in class A. I think whoever buys these modules is likely to be somebody who has enough experience to work out those details. They can also be rebiassed to aB.

Thank you for that clarification Bigun. Chapeau.

 

[Tony D.]

Sold to Vlad.

Thanks DIYAudio.

 

[Tony D.]

Packed and shipped today. i like pack as if the handling will be done by King Kong...because some times it is.