I have a NAD 3020 that I want to re-cap, but I have some questions about which caps would be the best to use. I plan on using Nichicon caps, so that will limit the field somewhat, but should I use KW audio grade, ES Muse bi-polar, or KL low leakage?
The schematic below shows the phono section of the pre-amp, you can see caps that I've circled in green and red. Green are what I thought should be bi-polar (ES) or low-leakage (KL), and red are audio grade (KW).
Since C401/402 are handling signals straight from the cartridge, I would imagine these would be better as bi-polar?
Phono stage.
The same goes for the tone control stage of the pre-amp, and the power amp. Should I use ES for the ones that appear to be in the signal path, and KWs for the ones that go to ground?
Tone control.
Power amp.
My last question concerns the power supply. I wonder why NAD put two resistors across the rectifier diodes like that?
Power supply.
Lee.
The schematic below shows the phono section of the pre-amp, you can see caps that I've circled in green and red. Green are what I thought should be bi-polar (ES) or low-leakage (KL), and red are audio grade (KW).
Since C401/402 are handling signals straight from the cartridge, I would imagine these would be better as bi-polar?
Phono stage.
The same goes for the tone control stage of the pre-amp, and the power amp. Should I use ES for the ones that appear to be in the signal path, and KWs for the ones that go to ground?
Tone control.
Power amp.
My last question concerns the power supply. I wonder why NAD put two resistors across the rectifier diodes like that?
Power supply.
Lee.
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