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John Curl's Blowtorch preamplifier part II
John Curl's Blowtorch preamplifier part II
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Old Yesterday, 03:21 PM   #98311
Reodor Felgen is offline Reodor Felgen
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Quote:
Originally Posted by RNMarsh View Post
This is an interesting PA design. I hope it gets written up in Linear Audio or better.

Here is 2 Ohm data some one asked about.... limited by the bench supply ->

The distortion hardly changes with load Z and output level and freq. (!)


Attachment 651072



THx-RNMarsh
Hi
You don't say anything about what the test frequency is, I guess it is 1K.
If it is 1K those numbers are not anything to write home about.
Maybe you could do the same test at 20K?
I would also like to see the clipping behaviour.
Please run it in to clipping and show us if it is oscillating.

Yours
Reodor
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Old Yesterday, 06:56 PM   #98312
john curl is offline john curl  United States
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I think they are VERY GOOD NUMBERS Richard. '-)
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Old Yesterday, 07:28 PM   #98313
jan.didden is offline jan.didden  Europe
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I think they are VERY GOOD NUMBERS dadod. '-)

Jan
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Old Yesterday, 07:33 PM   #98314
scottjoplin is offline scottjoplin  Wales
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Originally Posted by Jim the Oldbie View Post
Damn, now I wanna watch the movie again.
No,no,no, listen to the original Radio 4 series
Oh. I see he's already been told good and proper.......
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Old Yesterday, 09:18 PM   #98315
gpauk is offline gpauk  Scotland
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Quote:
Originally Posted by john curl View Post
Now what about repair? I don't know how to make my amps easier to fix.
Does that mean that you have designed them to be as easy to fix as possible?
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Old Yesterday, 09:54 PM   #98316
john curl is offline john curl  United States
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I have very little control on the 'fixability' of my designs. I make schematics and prototypes. The final assembly is done by others, none of whom I have ever met.
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Old Yesterday, 11:35 PM   #98317
hitsware is offline hitsware
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If your prototype layout were straightforward and open enough,
one would assume fixability (in that whoever did the final layout
couldn't resist following your example)
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Old Today, 12:02 AM   #98318
Zaphod Beeblebrox is offline Zaphod Beeblebrox  Australia
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Quote:
Originally Posted by john curl View Post
I have very little control on the 'fixability' of my designs. I make schematics and prototypes. The final assembly is done by others, none of whom I have ever met.
Thank goodness for that. I had to repair a JC1 awhile back. It was not much fun at all. Clearly, an amplifier designed to be assembled inexpensively. That said, it does sound quite decent.
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