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Hi,
I'm playing with BGT, in order to help me to find the best plastic value which parallel the 50000uf cap: what values did you test? Wich results? I know it's system dependant but it could be a starting point for me.
Thanks!
Follow Ups:
Any bypass I tried made the sound too bright on my system. Just the battery and the 47,000uF sounded best to me. I've found the positive impact to be in the areas of mid bass fullness and bass dynamics (for example, kick drum impact).
Hi,
Finally the best for my taste is 1uf K75-1000v + Teflon K72 0.068uf wich are bypassin 47000uf standard Rubycon + 3300uf Elna Cerafine.
When I changed 9v Battery for 6v lantern one I heard what you described: "I've found the positive impact to be in the areas of mid bass fullness and bass dynamics (for example, kick drum impact)."
I can't say much: that's it!
Just got in a couple Ruycon 47,000uf caps and one of them 'rattles' on the inside.
is there a way to check if its still good? I suppose charge it and see if it holds? has anyone noticed this before?
The cap should not rattle. Could be dried out.
Too many undefined and uncommon abbreviations, boys.
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Tin-eared audiofool, large-scale-Classical music lover, and damned-amateur fotografer.
William Bruce Cameron: "...not everything that can be counted counts, and not everything that counts can be counted."
Agreed. A short-cut that prevents understanding is no shortcut. WIMA is a brand. BGT I don't know.
I wrote about the obfuscatory nature (!) of abbreviations in these pages and was roundly dismissed.
I did a military career, where they love their TLAs (three-letter abbreviations).
Obviously, "Thing" is not correct. If you do a search here on BGT you will find more info than perhaps you could ever want. The idea is to attach the negative terminal of a battery to the audio ground in just about any piece of gear (preamplifier, CDP, etc). Then you "bypass" the two terminals of the battery (only) with a very large value electrolytic capacitor, which can have a very low voltage rating (as you might imagine, since there is no voltage across the terminals of the battery except that which is developed within the battery). Recommended battery voltage is or seems to be 9V. The positive terminal of the battery is connected to nothing but the positive terminal of the electrolytic. Then this electrolytic may be in turn bypassed with a low value film capacitor. Why this does anything, I do not know, since there is no circuit into and out of the gear itself. It is, apparently, the rare case that does not follow the rule, "It is what it is".
.
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Tin-eared audiofool, large-scale-Classical music lover, and damned-amateur fotografer.
William Bruce Cameron: "...not everything that can be counted counts, and not everything that counts can be counted."
I am using WIMA MKP10 1-2.2uF together with WIMA MKP10 0.01uf, all in parallel with elkos.
Ok 2.2uf that's pretty big! Thank you it gives me a scale to build my tests!
I think you'll find that at the low voltage rating required for the BGT, a 2.2uF film cap will be smaller in physical size than a 50,000uF electrolytic. I would suggest trying a polystyrene film cap; I think you can find one in that value rated for 50V, which is already overkill.
1uf/250V MKP10 is compact and great soundwise.
I believe Unclestu's results were 0.1uf for digital devices, and 1uf for amps and other analog devices.
You are from the South of France, where abouts, are you French?
Hi,Yes I'm french, living in a small village in the neighborhood of Avignon.
1uf is what I read already and what I put between amp and fullrange speakers. I'm not sure it's the optimum value in my case, maybe I'll try to add a little value: maybe a little shiny!
In another thread I saw some tweakers tried different brands for bypass caps, I tried too and the best one (and by far!) was not a little 1uf like Wima, erse or epcos but a HUGE 1uf/1000v Russian K75-10 Hybrid Paper and Polyethylene Terephthalate In Oil Capacitor (as big as a lantern battery!).
My 2 cents in memory of Unclestu's help!
Edits: 02/10/16 02/10/16
Ok, I used to live in Antibes quite a few years ago now...Before I was running 10,000uf - played with various values bypass from 0.1uf up to 3uf but was still feeling the bass was a little shy. Then I got a 5uf MIT Multicap and this restored the bass.
Now I'm using a Whopping!! great 220,000uf sprague lytic cap along with two 0.47uf Black gate NX's in Super-E config. Everything is fine like this
sounds superb with excellent bass.
I tried the 5uf alone with the 220,000uf but the midrange seemed to be a bit smeared, staggered or time delayed.Digital sounded progressively worse with large(r) value bypasses, I had some Mundorf silver in oil caps in my stash 0.1uf, these really pulled the whole thing together with 10,000uf lytics.
Jefferybehr fyi - Look up "Battery Ground Tweak"
Edits: 02/10/16 02/10/16 02/10/16
Antibes is a pretty place!
Well I see you made a lot of research, so the game seem very system dependant! Game is not over :)
I didn't try with the lantern lamp, only with little 9v type: my next test!
Huh? Between the amp and the speakercable, in series with the signal?
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Tin-eared audiofool, large-scale-Classical music lover, and damned-amateur fotografer.
William Bruce Cameron: "...not everything that can be counted counts, and not everything that counts can be counted."
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