Its 3 channels, two LM1875 and a sub channel with two paralleled TDA7293.
All driven from a modified amiga 500 power supply outputting 2x23VDC.
All driven from a modified amiga 500 power supply outputting 2x23VDC.
hi Tekko, I was using TDA7294 to power a sub. how is the TDA7293 performance. can you tell us more about your power supply and its current rating.....thanks bro
Its safe to say that the transformer in the amiga psu is MAX 100VA so i'd say 2.5-3A tops.
The TDA7293 seem to be performing well all way down to just a few Hz, the feedback cap is 270µF and input dc blocking is 1µF, i also have a passive lowpass filter on it and passive highpass filters on the stereo channels that cross around 90Hz.
The TDA7293 seem to be performing well all way down to just a few Hz, the feedback cap is 270µF and input dc blocking is 1µF, i also have a passive lowpass filter on it and passive highpass filters on the stereo channels that cross around 90Hz.
Gaincard ,wrong picture maybe😕
The cuts in that picture are from Final labs music-6
Tekko it said that by putiing a 20pf capacitor parallel with the feedback resistor. you get better roll off freq.
You know what I'd do with that thing? Once I checked that it operated and that there were no bare-wire shorts anywhere, I'd put the whole thing in a bucket, and pour two-part high-temperature clear epoxy over the whole thing, with only the heatsink sticking out. Then I'd carve into it with a chainsaw to carve out the amplifier as one solid block, then sand the sides flat with finer and finer sandpaper, then wet sand it for a mirror-smooth surface.
Call it a work of modern art.
Call it a work of modern art.
Just don't trip over any cables it's plugged into or it'll turn inside out like some 1970s handicraft based party trick 🙂
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