[KoKoKrunch]

Hey guys, I was wondering if anyone knew what specs does the ALO Vcaps have? I'm planning to do something like that in the near future with cheaper alternative but good caps as well

 

[joneeboi]

You could ask him or anyone who bought a portable VCap dock. I figure you could just buy their 1.0uF 250VDC cap and use that. It's the cheapest and will work fine.

The sound is really opening up on my BGed Millett Hybrid MAX and diyMod 4G setup. I feel really immersed in the music, and the bass has finally solidified. I don't know how long this sound sig will last, but it's a nice balance.

 

[CAvanessia]

Quote:

Originally Posted by KoKoKrunch /img/forum/go_quote.gif Hey guys, I was wondering if anyone knew what specs does the ALO Vcaps have? I'm planning to do something like that in the near future with cheaper alternative but good caps as well

In the ALO-sponsored forum section, there is a post of a dissected VCap special edition dock. To answer your question, ALO used 4.7uf caps. They also used VCAP 0.1uf teflon caps as a bypass (optional).

How are the bypass caps hooked up with the two primary caps? I think I'm going with Sonicap Gen I as primary caps and using 0.1uf Sonicap Gen II as bypass.

Would it be: input left -> positive lead of primary for left -> positive lead of bypass left then negative lead of left to output left?


Any help is appreciated. Thanks.

 

[KoKoKrunch]

I don't really get what you mean by bypass caps. Where are we supposed to have them?

 

[iQEM]

Quote:

Originally Posted by CAvanessia /img/forum/go_quote.gif I got mine from ebay also. It had a shorter width than the OEM battery. If it was slightly slightly smaller I could fit the 0.47uf caps on the side of the battery. That's something to think about if you could find a battery that is not as wide as OEM. Or someone could remove the headphone jack to fit the caps.

point 1 are nice to figure out, but removing headphone jack ?! it's a no-no for me...

after i change the bypass cable to something smaller (in size) now my new lcd are work properly now but i had a new problem, my clickwheel hadn't working at all...lol silly me...

my dock+caps to RCA are ready though, well i use RCA interconnect for a test...before a made my own CMOYamp, then i'll move the dock+caps to normal connector to amping...

here are my latest picts to my progress now...

 

[ruZZ.il]

Quote:

Originally Posted by CAvanessia /img/forum/go_quote.gif How are the bypass caps hooked up with the two primary caps?

In parallel.

 

[joneeboi]

The Basics - Bypass Capacitors

ecp.cc

From what I gather, you send the signal from the DAC to the amp in series with paralleled caps, each bypassing the other. One size is optimized for higher frequencies and the other is for lower frequencies.

 

[KoKoKrunch]

Lol I'm really confused... will any one be kind enough to draw me a circuit to exactly how I am supposed to do it??? From the 3.5mm input jack to the output jack???

 

[joneeboi]

Try this out. CLb and CRb are the bypass (or CLa and CRa, whichever you prefer). Let one set be the 47uF BGs or equivalent high quality caps, and let the other set be the ~0.1uF bypass caps. As for input and output jacks, you can put them wherever you like, as long as the circuit looks the same.

 

[CAvanessia]

Quote:

Originally Posted by joneeboi /img/forum/go_quote.gif Try this out. CLb and CRb are the bypass (or CLa and CRa, whichever you prefer). Let one set be the 47uF BGs or equivalent high quality caps, and let the other set be the ~0.1uF bypass caps. As for input and output jacks, you can put them wherever you like, as long as the circuit looks the same.

Cool - basically just put the caps in parallel. In the thread I read, the 4.7uf caps were in the "driving seat" and the 0.1uf caps were the bypass. How does this setup differentiate between the caps or is it just some electrical thing we don't have to worry about?

 

[RCM]

Quote:

Originally Posted by CAvanessia /img/forum/go_quote.gif How does this setup differentiate between the caps or is it just some electrical thing we don't have to worry about?

My thoughts exactly-can some of the signal escape the teflon cap and make it through the bigger cap without passing through the teflon cap? Would it not be better to put them in series with the teflon v-cap hooked up between the larger cap and the amp as a sort of staggered filtering system?

Hey-I'm admittedly electrically challenged!

I've got a set of 6.8uf V-caps on the way and was looking to add some teflons to the mix as well...

 

[joneeboi]

At this point, you start getting deeper into the tweaking bit, balancing between the treble and bass with the quality of brands and combination of cap sizes. Since you're going the route of external casing for the caps, you don't have to worry about real estate. If you do decide to go that route, let us know how it goes.

 

[joneeboi]

The bigger cap manages the lower frequencies and the smaller ones take care of the higher frequencies.

 

[Jambo]

Having several caps in parallel for AC coupling is a new one on me. I would have thought that you would introduce more non-linearities than you would remove...

 

[joneeboi]

What kind of nonlinearities were you referring to, Jambo? It seems to me that it's more of a stability issue than sound. Surely, the sound will be affected and some will describe the sound to have such and such quality, but I mean that the sound would follow the improved technical, specification side of the electronics. I'd imagine it being much like the Driver Number Wars we seem to have between the IEM manufacturers of late. Shure came out with another triple driver, UE released the triple.fi and Westone projected their 3. All the while Etymotic hasn't changed their stance from a single driver philosophy (how long has it been, 15 years?), maintaining that the crossovers in the multi-driver IEMS take away from the sound. Following the analogy, some would say the more paralleled caps, the better; the link up there has a picture of three bypass caps.

It inevitably comes down to your personal design philosophy; do you prefer to delegate work or do you prefer a single task-accomplisher accomplishing tasks? As I mentioned earlier, one argument against paralleling so many caps is the issue of limited space. Since not too much is taking up the ALO VCap dock, vvs_75's Sonicap dock or CAvanessia's BG NX dock, you could experiment with as many bypass caps as you like. I don't think more than two would be necessary as we're only working with a 20Hz-20,000Hz bandwidth, but again, it comes down to personal choice.

I hope I didn't spew too much garbage for those of you actually in the know. =T