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Old 18th July 2013, 05:32 PM   #811
generg is offline generg  Germany
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Interesting! Forgot this possibility, I was fixed on classic 25W FW solutions...!
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and the First Wtt is......a really First Class PSS Idea
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Old 22nd June 2014, 01:58 AM   #812
Strosek is offline Strosek  Canada
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Will J2 boards ever become available...? I purchased a whole bunch of SemiSouth devices in the hopes that they would one day.
Maybe I should just trade them with Nelson for a completed original amp and call it a day
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Old 22nd June 2014, 02:00 AM   #813
PKI is offline PKI  United States
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Make F6 :-)
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Old 22nd June 2014, 02:04 AM   #814
labjr is offline labjr  United States
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Will F6 boards with universal mounting be available from the store?
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Old 22nd June 2014, 03:23 AM   #815
6L6 is offline 6L6  United States
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Perhaps. The biggest issue is deciding on what will be the specified input transformer(s). (As specifying one may be inconvenient for some)I would also like to take a peek at the production version's schematic to see what everything evolved into...

That said, the Tea-Bag PCB kinda sorta fit on the UMS.
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Old 22nd June 2014, 03:25 AM   #816
labjr is offline labjr  United States
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I'd like something with more space between the outputs. The Jensen transformers in the original design would be fine.
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Old 22nd June 2014, 03:32 AM   #817
6L6 is offline 6L6  United States
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The single biggest issue is magnetic induction - those tiny little transformers are in the same metal case as a big-honkin' toroid, which even if shielded, has magnetic flux all around. So in a perfect world, the input transformers are both on the same side of the case, and as far from the power transformer as possible - this means, most likely, a mirror set of PCB.

Now you could of course mount one 'upside down' in regards to the other, but then the output devices will be mounted low on one channel's heatsink, and high on the other. This will have effectively no difference on the heat transfer and efficiency of the heatsink, but trust me, the natives will become very restless and much gnashing of teeth will occur. They hate things that are unsymmetrical...

Anyway, more space between 2 mosfets isn't the issue for this amp, transformer mounting position is everything.
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Old 22nd June 2014, 03:51 AM   #818
labjr is offline labjr  United States
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I don't see a problem with making boards similar to Nelson's original. I don't want daughter boards etc.
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Old 22nd June 2014, 03:53 AM   #819
6L6 is offline 6L6  United States
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I completely agree.

I also understand why the Tea Bag boards were made that way, and think it was a great decision for his customers. A Store board needs to be accountable to the UMS and something similar to the original NP boards would be ideal.
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Old 23rd June 2014, 01:04 AM   #820
Strosek is offline Strosek  Canada
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Quote:
Originally Posted by PKI View Post
Make F6 :-)

Thanks I'll look into it!
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