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Chip Amps Amplifiers based on integrated circuits

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Old 5th July 2020, 12:29 AM   #41
Panelhead is offline Panelhead
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Join Date: Dec 2002
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No heatsinks. Used chassis and then needed plate and CPU cooler. First transformers gave 37 volt rails and it ran hot. Changed out before the LM3886 gave up.
Using line input transformers instead of an input coupling cap to block DC. Have two installed, a Jensen and a Cinemag 4:1 stepdowns. Just resoldet the leads to swap for comparison.
DAC used is balanced only, prefer line transformer to cap and leads to convert balanced to SE.
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Old 5th July 2020, 12:43 AM   #42
Panelhead is offline Panelhead
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I always install a snubber across the 10,000 ufd reservoir caps and 22 ufd caps directly to the legs of the LM3886. This gives a 20 to one drop in capacitance for decoupling, 10K, 470, and 22 ufd.
The snubber is 0.1 ohm Dale and 47 nfd Siemens stacked film because this is what I have.
The total lead length for the two Panasonic 22ufd 50v FM caps is under 1 cm. Should be low inductance.
The picture is from another amp, but all my My_Ref, Evo, and FE are the same.
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Old 9th July 2020, 06:56 AM   #43
voxxonline is offline voxxonline  Russian Federation
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Took photos of my resting MyRef. Will need to clean it, upgrade components, order (finally) front panels from somewhere so it looks better and to connect to other parts of the chain.
My wife is leaving for a few weeks so I will be alone at home- perfect time to complete everything.
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Old 9th July 2020, 09:54 AM   #44
voxxonline is offline voxxonline  Russian Federation
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Guys, what pre's are you using at the moment with the amp?
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Old 31st July 2020, 12:13 AM   #45
turion64 is offline turion64  United States
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Im using a preamp built from a kit, the Akitika PR-101.
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Old 1st August 2020, 12:21 PM   #46
lehmanhill is offline lehmanhill  United States
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Sorry, I didn't see this.

I'm using a DIY Relaixed2 pre. It has 6 dB gain on SE and 9 dB on balanced.
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