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Old 3rd May 2013, 03:27 AM   #321
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Even my wife knows that "good" speakers will put a hurt on the bank account. She looks worried. That means I should look worried...

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Originally Posted by c2cthomas View Post
Warning - warning: If not careful soon you will be looking at things like "good" speakers (depending upon your wants and needs - not to mention WAF) and decent source material......


Worse than that you can wind up looking goofy......
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Old 3rd May 2013, 03:56 AM   #322
49 - for the 18th time
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Originally Posted by Semisouthfan View Post
Even my wife knows that "good" speakers will put a hurt on the bank account. She looks worried. That means I should look worried...
That depends on your taste (always an evolving problem) budget, and WAF. There are a lot of successful open baffle builds that have been done for not much money - but does OB fit in with you and yours?

Planet 10 has some great single driver designs that can be knocked up for not an awful lot of $$$ if you are careful in your driver selection.

You have a bunch of fans here that want you to succeed in your development of your devices because - as ZM would say - we are a bunch of greedy boyz that just have to get our hands on the best sounding circuits and devices we can afford. If you need good speakers to do your listening test with just give us the word and you would have more help than you can ever imagine because we stand to benefit from the work you are doing......

Plus we are all really good-natured, intelligent, handsome chaps that enjoy helping others out.....
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Old 3rd May 2013, 03:56 AM   #323
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Buzz,

The second article, long in coming (sorry), is about distortion reduction from load-line canceling, and measurement and modeling methods to assist DIY'rs to estimate performance of SemiSouth JFETs (and other transistors) in amps.

I plan for a third article to be on other forms of negative feedback, with a particular look at source degeneration. From my analysis, for example, the 0.6 Ohm of Rs in an F2J contributes to THD reduction. It is likely that anything in the range you quote will make a difference.

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Originally Posted by buzzforb View Post
ONly part of the time.

Mike, is the second article about the optimization process you used in selecting your source resistors for the J2. I have a pair waiting on such a bit of advice.
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Originally Posted by flg View Post
The graphs I made some time back showed promissing results for Rs values in the .25-.3 ohm range.
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Old 3rd May 2013, 04:00 AM   #324
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Thanks, c2, that's really thoughtful of you!

Quote:
Originally Posted by c2cthomas View Post
That depends on your taste (always an evolving problem) budget, and WAF. There are a lot of successful open baffle builds that have been done for not much money - but does OB fit in with you and yours?

Planet 10 has some great single driver designs that can be knocked up for not an awful lot of $$$ if you are careful in your driver selection.

You have a bunch of fans here that want you to succeed in your development of your devices because - as ZM would say - we are a bunch of greedy boyz that just have to get our hands on the best sounding circuits and devices we can afford. If you need good speakers to do your listening test with just give us the word and you would have more help than you can ever imagine because we stand to benefit from the work you are doing......

Plus we are all really good-natured, intelligent, handsome chaps that enjoy helping others out.....
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Old 3rd May 2013, 04:14 AM   #325
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Quote:
Originally Posted by Semisouthfan View Post
Thanks, c2, that's really thoughtful of you!
Fair warning - I listen to "new" Country and Western music on a pair of the ugliest DIY omni-directional speakers ever created.....
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File Type: gif Walsh Ohm Speaker Article 4.gif (91.9 KB, 334 views)
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Old 3rd May 2013, 07:40 AM   #326
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Quote:
Originally Posted by c2cthomas View Post
....
Plus we are all really good-natured, intelligent, handsome chaps that enjoy helping others out.....
speak for your self ; I'm everything contrary , except my huge handsomeness



(good spks can be , sort of , cheap ..... but only in absolute terms )
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Old 3rd May 2013, 11:44 AM   #327
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Quote:
Originally Posted by c2cthomas View Post
Fair warning - I listen to "new" Country and Western music on a pair of the ugliest DIY omni-directional speakers ever created.....
They are not ugly. They are pretty (though reminds, a little, KKK )
I have always wondered why omni designers do not expand the LF tube to form a true horn...besides space, WAF and technical difficulty that is...

Sorry for OT.

M.
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Old 4th May 2013, 02:24 AM   #328
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Quote:
Originally Posted by c2cthomas View Post
a pair of the ugliest DIY omni-directional speakers
Mmmmmmm. Fast and Bulbous.

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Old 4th May 2013, 05:13 AM   #329
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This iz bulbous......
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Old 4th May 2013, 10:15 AM   #330
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Please say you are going to try that. You will be king of DIY.
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