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John Curl's Blowtorch preamplifier part II
John Curl's Blowtorch preamplifier part II
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Old 13th April 2013, 02:35 AM   #38021
Steve Eddy is offline Steve Eddy  United States
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Quote:
Originally Posted by fas42 View Post
Or was that, "A butt much ..."
Ooops. Sorry. Was supposed to be "A butt munch."

se
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Old 13th April 2013, 02:37 AM   #38022
hitsware is offline hitsware
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Click the image to open in full size.
I would suggest no 90 right angle turns on the traces
( rounded is preferred )
 
Old 13th April 2013, 02:45 AM   #38023
Steve Eddy is offline Steve Eddy  United States
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Originally Posted by john curl View Post
Yes, mil spec, 'clumsy, ham-fisted hardware'. You really don't know what you are talking about, SE.
Oh yeah, pull out the buzz words, John and the empty personal insult.

It's the IMPLEMENTATION that's "clumsy and ham-fisted."

You need a FOUR deck switch just to switch the polarity of TWO channels? Really, John?

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Besides, I was referring to the multi position Shalco as the real problem.
What exactly do you mean by "the multi position Shalco"? You said "the quad Shalco switches are too deep." The only quad switch I see is the polarity switch, which is what I was talking about when I said "clumsy and ham-fisted."

So exactly what switch are you referring to?

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Old 13th April 2013, 02:47 AM   #38024
Steve Eddy is offline Steve Eddy  United States
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Originally Posted by hitsware View Post
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I would suggest no 90 right angle turns on the traces
( rounded is preferred )
The electrons are quite capable of making the sharp turns. None of them ever spun out and went off the track.

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Old 13th April 2013, 03:02 AM   #38025
hitsware is offline hitsware
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Originally Posted by Steve Eddy View Post
The electrons are quite capable of making the sharp turns. None of them ever spun out and went off the track.

se
Stricktly 2nd hand empirical knowledge
suggests otherwise ..........
Maybe not "off the track" , but 'deharmonized'
 
Old 13th April 2013, 03:10 AM   #38026
Steve Eddy is offline Steve Eddy  United States
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Quote:
Originally Posted by john curl View Post
Now, SE let us look at your design. Unity gain, is it?
Yes.

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Why all the caps, trying to impress somebody? Toroids? ICK!
I must confess that at the time I designed that over 20 years ago, I allowed myself to be swayed a bit by the prevailing "audiophile" wisdom. That multiple small caps in parallel were better than a single large value cap and that toroid power transformers were the greatest thing since sliced bread. Many of the "listening contest winners" at the time were doing the same things.

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Standard power supply bridges?
Yup. I found them to work and sound just fine.

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Just my humble opinion. '-)
Great. So why don't you comment on something that hasn't been out of production for over 20 years. I posted a current schematic some posts back. Comment on that if you'd like. It would at least have some relevance to today.

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Last edited by Steve Eddy; 13th April 2013 at 03:13 AM.
 
Old 13th April 2013, 03:10 AM   #38027
chris719 is offline chris719  United States
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John Curl's Blowtorch preamplifier part II
It's not microstrip, stripline, or a co-planar waveguide carrying GHz signals, I think a 90 degree turn will be just fine.
 
Old 13th April 2013, 03:11 AM   #38028
Steve Eddy is offline Steve Eddy  United States
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Originally Posted by hitsware View Post
Stricktly 2nd hand empirical knowledge
suggests otherwise ..........
Maybe not "off the track" , but 'deharmonized'
No, not even that. They later went on to win the national Barber Shop Quartet competition.

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Old 13th April 2013, 03:26 AM   #38029
Steve Eddy is offline Steve Eddy  United States
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Originally Posted by chris719 View Post
It's not microstrip, stripline, or a co-planar waveguide carrying GHz signals, I think a 90 degree turn will be just fine.
Actually, the traces that Mike is referring to only carried DC control voltages for the relays.

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Old 13th April 2013, 04:02 AM   #38030
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lol, he said humble...
 

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