John Curl's Blowtorch preamplifier

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john curl said:
I was 'called' to task about who these 'associates' are, as if we were of some 'secret order' like POOGE, once active on these issues.
Now when it comes to 'insulting' behavior. I find that about 1/2 of the contributors here to be extremely insulting to the other 1/2 of contributors

Huh??? No idea of what you are talking about here.

The only thing I've tried to do regarding you is try to coax you out of the first half into the second half like 90% of the other posters have been trying to do. But you just don't seem to learn.
 
pooge said:
Yes. I knew that. That's where I got the name from. I pooged the DAC960 that I purchased from Walt. I just don't see the need to make an issue of it. It's just a damn screen name.


OK. I didn't know that. It may be just a screen name for you but I remember that at the time a lot of people liked it. It was seen as a kind of strategy to get to Hi-end performance starting out with run-of-the-mill equipment. Nice idea I'd think.

Jan Didden
 
john curl said:
People used to accuse Walt of being part of a secret society called POOGE, and I was asked not to divulge what it really meant. We got a good laugh out of it, years ago. I hope that it is OK, today.

I did a Hafler 220, Walt even sent me the teflon wire that I used to make "Litz" wire. I am not convinced that beyond biasing the output at 50W and starring the grounds there were any other improvements.
 
quote: So no one gives a fudge about earth loops then? There is really nothing to say other than your's is an excellent solution to the problem. If you like, a low pass filter can be added to the primary side of the isolation transformer. John

Safety has been improved by changing the standard Australian/NZ/European mains scheme which has a single phase 230V referred to ground to a system that has two phases with 115V referred to ground.

Lesser volts means fewer bodies, everything else being equal.

This two phase system for getting 230V will be familiar to US engineers (well, electricians anyway) as standard indistrial practice.
 
It doesn't matter that Scott, one individual, heard no difference. It is more important if there are some out there, who do. When we try to move forward, we often have set-backs, and even 'friends' who hear no difference. Can we separate the real from the repressed? No!
 
VivaVee said:


Safety has been improved by changing the standard Australian/NZ/European mains scheme which has a single phase 230V referred to ground to a system that has two phases with 115V referred to ground.

Lesser volts means fewer bodies, everything else being equal.

This two phase system for getting 230V will be familiar to US engineers (well, electricians anyway) as standard indistrial practice.


For some reason we Americans insist on calling this single phase.
 
john curl said:
It doesn't matter that Scott, one individual, heard no difference. It is more important if there are some out there, who do.

The crux of the matter. Following any formal logic principle in the last 2000 years, and unless you deny the Zermelo axiom, either "I don't hear" or "some do hear" are exactly equivalent: they have 0 (zero) generalization value.

There is one anthropogonic difference though: "I don't hear" is always true, "other can hear" is not necessary the same. You don't know what other hear, you know what other think they hear.
 
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