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Old 4th April 2013, 09:10 AM   #4061
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I told you it was exercise in frivolity.
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Old 6th April 2013, 04:08 PM   #4062
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THanks to mighty ZM. This is next on list. will try to have it up and running in month after GB stuff. I cant wait.
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Old 6th April 2013, 04:18 PM   #4063
lhquam is offline lhquam  United States
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Originally Posted by buzzforb View Post
THanks to mighty ZM. This is next on list. will try to have it up and running in month after GB stuff. I cant wait.
Buzz: Have you built or simmed this circuit? Power supply ripple on the negative rail might be a serious problem. Since the circuit is balanced, it will cancel most of the ripple.
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Old 6th April 2013, 07:14 PM   #4064
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No. I built the more cumbersome, two transformer version and cannot be more happy. This has serious potential as well, based on what i am hearing. ZM has simmed it and i trust what he says.
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Old 6th April 2013, 10:31 PM   #4065
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lhquam is right ; I was avare of that from first moment when I go down with modulation ..... but I think it is small price having offset to gnd modulated with ripple , if we can go through just one core with signal

whatever - Bzzzzz will soon ( hopefully ) compare two things and then we'll know

in a meantime , we can search for 6-fillar wound repeater

if boyz from Jensen made 4-fillar , maybe they already have 6-fillar or can be asked to make it

that one will be ideal for proper full bal F6 , with no flaws
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Old 6th April 2013, 10:36 PM   #4066
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Electra-Print could make that.
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Old 6th April 2013, 10:43 PM   #4067
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I love flaws. What about talking to BudP. Tell em what I need and I assume the third set is for the input pair. It will allow droppping the caps in signal path, correct. I thnk Jensen may have one already.
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Old 6th April 2013, 11:27 PM   #4068
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but wait ......... there is mooooore thinking needed to have it properly

nothing yet finished , so - please no ordering
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Old 6th April 2013, 11:46 PM   #4069
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Speakers and preamp are next. We are in theory mode. I am thinking of way to do ,ulti board for first and second versions.
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Old 7th April 2013, 12:10 AM   #4070
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Just keep in mind that transformers are summing devices What one winding finds will affect all. All "secondaries" and "primaries" talk among themselves, so be very certain that you do not build a resonance circuit across 5 or more windings.

As an addendum, we don't usually build multifilar wound transformers. This format does provide nice, civil, linear responding devices, just like nice, civil, linear responding power transformers do. I prefer to make meta stable devices. They do not measure as well, they are not civil and they will respond to every half wave with the enthusiasm that linear transformers can muster for only the first half wave of any sinusoidal event.

Doesn't mean I won't make a 6 filar transformer. They will not oscillate in resonance, by the way. They will still be metastable, but the E Field coupling, hence ALL of the internal gradient information for tones and transients will be somewhat compromised.

Metastable here means always returning to B zero at the same time that H reaches zero, so every half wave has that funny looking little initiating squiggle that you see on the hysteresis plots of nice, civil, linear transformers for the initial movement from their rest. These squiggles are present for each half of a square wave also.....

Bud
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