aos
May one day solve the Mystery of the Whoosh
- Joined
- Jun 21, 2001
- Posts
- 1,841
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- 13
Actually I do use MillMax sockets, low or ultralow profile - that's not the problem, I never ever wore one out. It's the SOIC to DIP adapter, if I wasn't clear. Pins on those things get easily loose and yes sometimes even fall out! Jbelin could testify since the AD8620 I sent him was in one of such sockets that I had to repair (I had no others at that time). Looking at that thing really adds a meaning to the term "opamp wars". Opamps also generaly tolerate a lot of plugin/plugout but you have to be careful as well as adjust the gap because eventually it loses the tension.
PPA DAC was designed just to ppl's liking, there are no capacitors even in feedback path. Only for bypassing and in the passive analog filter. I routinely use LM6172 there and it hasn't oscillated even though it has no compensation cap (I tried to lay out that section of PCB as high-speed, following National Semi demo PCBs, perhaps I even suceeded this time). I have to say that I usually follow his advice becuase so far it always led to good sound.
Also, as I mentioned, I want a cap, to protect me from my own stupidity. People who are careful, patient and not stupid probably don't need one.
PPA DAC was designed just to ppl's liking, there are no capacitors even in feedback path. Only for bypassing and in the passive analog filter. I routinely use LM6172 there and it hasn't oscillated even though it has no compensation cap (I tried to lay out that section of PCB as high-speed, following National Semi demo PCBs, perhaps I even suceeded this time). I have to say that I usually follow his advice becuase so far it always led to good sound.
Also, as I mentioned, I want a cap, to protect me from my own stupidity. People who are careful, patient and not stupid probably don't need one.