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Folsom EC7293: PVI Powered Frontend, 60/120w 8/4ohm

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#103
The diystore is out of the keratherm insulators. These should be a fine substitute right? Keratherm Red (86/82): Ultra-Low Thermal Resistance Pads for LM3886 – Neurochrome

Destroyer OS said:
Well you could mount this one inside like you have in the picture; if there's room. You could put all the PSU stuff towards the front. I'm not saying the heatspreader wouldn't be necessary but it's not a bad idea depending on your skill level. The venting top and bottom should be ok. This would allow you to load the amp down. The only problem I could see is if ambient was real hot. Depending on load it may never get hot with that heatsink.
Click to expand...

I see that these heatsink fins are 3 inches long and you can customize the width of the heatsink but there is no mention of height. Am I missing something?
 
#104
Yes those Keratherms will work great, from Tom.

The heatsinks from Heatsink USA "length" sizing is actually the height. I know it's slightly confusing. The width is chosen on the left side, and the depth is tied to width.


BTW I only have enough for two more stereo/dualmono amplifiers right now.
 
#105
Nerves

Oh my! Now that the order is in, I'm starting to feel nervous.... This will by far be my biggest DIY-projet to date. A little more challenging then soldering a few wires and small caps together to make a loudspeaker. But what would life be without challenges, right?
I'm most certainly going to ask others building or having built the amp a lot of questions, and hopefully I can enlist a more electronically gifted friend or two when in crisis.
But hey, gonna let it take some time, and enjoy the learning experience, as I've done with projects in the past.😱
 
#118
Well, here's the thing since it changes how the feedback work, I don't have a rock solid solution yet. The stability of the amp may depend on it staying where it is at for now. If I can get it stable at a lower amount I can report back for those that want to make the change.

Are you having trouble with mating to speakers? I have 99db sensitivity speakers but no issue so far.
 
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