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In Reply to: RE: I know, but... posted by Lew on August 13, 2015 at 09:57:39
The quote from "unclestu":"A couple of EE's I approached about the idea, gave me a blank stare, and said with the positive not connected to the component, in any way, you should expect zero results: nada, absolutely nothing. When they heard the difference themselves, a lot of head scratching went on, and all admitted nothing like this ever appeared in their university textbooks, they were truly stumped."
And for some the easy answer is WHY ASK WHY...Lol
I made a 100,000uf BGT with a .15uf bypass cap that is plugged into the USB port of my iMac that i use to stream music to my Headphone Dac/Amp, and it's so good that the BGT will remain there, like OMG all that has been said (GOOD) about the BGT is true.
YMMV
The Man From U.N.C.L.E. Stu. Thank You.
~D
Wherever you go there you are.
Edits: 08/13/15 08/13/15Follow Ups:
Because only by asking why (and then trying to answer the question) is real progress made. If your forebears had not asked why, you would be sitting in a cave waiting for a miracle.
Hey Lew, i like my cave...and i need two miracles.
And where do you see ("I") or ("me") in this sentence: "And for some the easy answer is WHY ASK WHY...Lol"
~D
Wherever you go there you are.
"I made a 100,000uf BGT with a .15uf bypass cap that is plugged into the USB port of my iMac."
I applied a 3/8"x1/4" piece of fo.q audio TA-102 Tuning Material to the .15uf bypass cap and the upper midrange to the top of the high frequencies became cleaner/clearer and more focused. The .15uf Vishay cap was already attached to the front of the 9v Duracell battery with a heavy duty double sided tape from 3M and running in my system for five days before i applied the fo.q audio TA-102 Tuning Material to the bypass cap, so why would this improve my BGT???...but i am glad it did.
YMMV
~D
Wherever you go there you are.
Why? Apparently there are vibrations running through these components as signal (however it is, and whatever amount) is being directed through them. This is a wonderful discovery.
The TA-102 and (the thinner) TA-32 materials definitely work as intended.
"The TA-102 and (the thinner) TA-32 materials definitely work as intended."
They are both excellent at what they do.
~D
Wherever you go there you are.
More ideas on the subject while actually experiencing it can only help the discussion. Using textbook physics seems to provide little or no answers. The fact that i works and the fact that even Bud Purvine's simple wire tweak also work indicates a deep gap in our current understanding.
Just My opinion of course
Uncle Stu,
Thank you for your extra-ordinary innovation!
I've made a couple of BGTs with amazing results. Last night, I put an 0.22 uf bypass cap on a 9 V + 4,700 uf X 3 BGT, which connects to the -ve post of loud speaker. Holly, the reproduction of music improves further. I can hear more layers and details, and so lively too.
As far as I know, many diyers in Hong Kong have been intrigued by the BGT recently. They have tried different values of capacitors. Generally, the more higher values of by-pass capacitors they use, the more improvement in reproduction of music. I am going to make some more...
What a great tweak with so many variations you can play with!
I have a dumb question. When using bgt with a stereo preamp do we use 2 bgt (one for each channel) or does a single one take care of the whole unit? My preamp is single ended RCA, not balanced. Same question if building these for speakers.
Already built two for the preamp. Haven't used them yet.
Thanks.
does a single one take care of the whole unit?
It's not dumb - it's perfectly reasonable. In the sense that there's a continuous ground from input to loudspeaker, I'd have thought the answer would, at least nominally, be yes.
I used banks of 3x3,300uF Nichion caps (w 100n bypass) at several points in the system, each with its own 9v battery. That way seemed to sound better to me than just the one though I've not double-checked by later removing this or that.
I didn't get an issue with unnatural sound as Tireman2012 reports. Who knows? You might - but I didn't :> )
HTH
Dave
Thanks for the answers guys.Tried single bgt with 9v battery on my transformer based passive line stage. No matter what cap value I used the highs bothered me. Switched to 6v lantern battery and the highs don't stick out so much. Every cap makes a sound difference. There is a wider, deeper soundstage with right combination. Shows potential.
I think a single bgt will be fine for the whole system. Actually, I've tried using two ( one connecting amp and the other DAC), feeling the sound reproduction a bit not natural.
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