Hi all,
Got this from a client. He used it for the demo board of his car stereo store.
There is a reason why Pyramid was cheap, it's not a well designed power unit.
All kinds of 'half assed' stuff was built into it's design.
It was a mess.
All kinds of parts were blown out in this thing.
Most of them because of poor engineering.
The idiots used black anodize screws.
For some things they look great, but as conductors of voltage, they don't always work.
Anodizing is an insulator.
So when things don't conduct well, they get hot, and that kills transistors.
Speaking of transistors, all eight output transistors were wiped out.
I put in new ones.
The OEM failed to torque down a main power diode, that too went into the trash heap.
New one came out of the parts bin.
Among anther things that got wiped out were two resistors and the main regulator IC.
Got about three or four hours into it.
http://www.flickr.com/photos/9010884...7632568360299/
Found the schematic c/o the Repeater Builders web site, many thanks to them.
Jack Crow
Got this from a client. He used it for the demo board of his car stereo store.
There is a reason why Pyramid was cheap, it's not a well designed power unit.
All kinds of 'half assed' stuff was built into it's design.
It was a mess.
All kinds of parts were blown out in this thing.
Most of them because of poor engineering.
The idiots used black anodize screws.
For some things they look great, but as conductors of voltage, they don't always work.
Anodizing is an insulator.
So when things don't conduct well, they get hot, and that kills transistors.
Speaking of transistors, all eight output transistors were wiped out.
I put in new ones.
The OEM failed to torque down a main power diode, that too went into the trash heap.
New one came out of the parts bin.
Among anther things that got wiped out were two resistors and the main regulator IC.
Got about three or four hours into it.
http://www.flickr.com/photos/9010884...7632568360299/
Found the schematic c/o the Repeater Builders web site, many thanks to them.
Jack Crow
