HiFan's latest activity
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HiFan replied to the thread The Opamp thread.According to datasheet, it doesn't help with noise but transient response, as I previosly mentioned. It seems the chip uses it only to... -
HiFan replied to the thread The Opamp thread.You still have to check datasheets. LT makes some chips based on similar designs of TI and onsemi. For example, LT1085/LM317/LM340...
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HiFan replied to the thread The Opamp thread.TBH, i do appreciate your input, but IME it is all decided by peripheral circuit rather than the opamp. To date I only roll in opamps...
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HiFan replied to the thread The Opamp thread.I have opa2156 sitting aside to be installed onto adapters. I have been a bit lazy but will try it out this weekend. In my...
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HiFan replied to the thread The Opamp thread.It really depends on your circuit. I have several amps that takes dip-8 opamps, and I have found not all make a difference. In my...
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All done. I revised the negative feedback scheme with a set 220k resistor and switched in 330k and 100k, for paralleled resistance of...
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I will certainly check them out. Thank you!
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HiFan replied to the thread Skill required for a Bottlehead build?.Dave from EEVblog recently posted videos on soldering skills. His tutorial on this is among the best (in correctness).
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Well, there's the input cap, followed by 2 RC filters before power is taken off. The total capacitance is 990uF. For a low powered...
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HiFan replied to the thread The Opamp thread.I run opa1656 in my modded HA21. It partially depends on your circuit and some doesn't make opamps sound drastically different. I think...
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HiFan replied to the thread Little Dot Mk II Rebuild.That's a lot of work (looks beautiful) here. It seems like a good chance to do some mod on it :) Isn't 330uf as incoming filter too...
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HiFan replied to the thread What do you think of the AKM VERITA AK4490 DAC chip?.Dont scratch your head too much on the chip used. Analog stage affects sound way more than the chip does. When properlly implemented...
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HiFan replied to the thread "Millett Hybrid" redux: NuHybrid headphone amp, using the Korg Nutube.I looked at your photos a bit more. Did you ground your board and case? I normally would sand around power, screw, and pot holes so they...
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HiFan reacted to ken_chuang's post in the thread "Millett Hybrid" redux: NuHybrid headphone amp, using the Korg Nutube with
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Search for "OPA1611AID with Extended 200MA Current Class A Output Single OP AMP Module", many e-commerce sites sell them. This is my... -
HiFan replied to the thread "Millett Hybrid" redux: NuHybrid headphone amp, using the Korg Nutube.That circuit is picky on the opamps. I have tried a few but only opa209 and LT1357 families works. Some will have higher white noise in...
