BrianGT's 4780NIGC assembly & comment

[digi01]

How many people are there assembling 4780NIGC amp designed by BrianGT? My amp will completed soon.

ZANG

[BrianGT]

Schematic here for the project:
http://www.chipamp.com/lm4780.pdf

--
Brian

[digi01]

the amp parts is completed.

[digi01]

amp top view.

ZANG

[bill1961]

I checked yesterday Chipamp website for the 4780 PCB, but they are temporarily out of stock.

Waiting...

[x. onasis]

I've built a couple. One major difference over the 3875 is the need for much larger heatsink, I find your attaching the chip to the end fin an interesting application. How's that working out?

[maxw]

Originally posted by digi01
amp top view.

ZANG

Good stuff Digi.
How big is that toroidal?

[digi01]

Originally posted by x. onasis
I've built a couple. One major difference over the 3875 is the need for much larger heatsink, I find your attaching the chip to the end fin an interesting application. How's that working out?

Yes,two 4780 work in parallel need a heavy duty heat sink.My chassis has not been processed well yet,the amplifier will be finished after a few days.

P.S.
I make this amplifier used for upgrading my dad's audio system, what he uses now is a Panasonic SU7700.


to Maxw,thank you.
that transformer is 240VA 2X 22VAC.100x100mm dimension.

ZANG

[pinkmouse]

Waiting for decent power resistors, you just can't seem to get anything for a reasonable price in the UK.

[gmphadte]

for digi01

They both are having hot neighbours.
Don't u think they will be better on the opposite side of the heatsink, but may be a bit difficult for assembling.

Gajanan