Goal: Build a GC without killing myself!
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 Chip Amps Amplifiers based on integrated circuits

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diyAudio Member

Join Date: Jul 2002
Re: Goal: Build a GC without killing myself!

Quote:
 Originally posted by GrahamnDodder The 1uf cap for running across the rails (pin 1 to 4) is a 50v Panasonic cap. I am running a 25/25/330 toriodal trafo, so I think I have to get a higher voltage cap for the voltage across the rails after DC conversion. Am I right here? If so, should 63v do it, or do I need 100v?
You are looking at close to 80V between rails with those secondaries, so 100V cap is a safer choice. You might not need it at all, anyway. I didn't find it useful in my circuit. So what exactly is your primary, 330V and you are using it with 110V?

You indeed sound like 15 years old with a condom in a pocket
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“Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

 8th August 2003, 03:47 AM #3 diyAudio Member   Join Date: Jun 2003 Location: Near Baltimore, MD Transformer is a 25/25/330VA toroidal, I am using a single for both channels, running 115 v AC input. Two bridges, split the rails for each channel there. Normal (2-1000 uf) caps on each channel. What, in theory, does the pin-1- to 4-cap do if it is not really needed? Reduce relative noise between the rails? When I was first, well, memorizing the circuit I just took it for granted. But now as I start to understand the amp more it, (the cap) doesn't seem to make a whole lot of sense. GnD __________________ I had the right to remain silent. I just didn't have the ability. (Comedian Ron White)
 8th August 2003, 04:12 AM #4 diyAudio Member     Join Date: Jul 2002 Location: Toronto, Canada In some circuits the cap may help to reduce noise or oscillations, but if you go for a compact p2p layout, you might not needed. Try it out and see if it does anything to the sound. In my circuit, I noticed that highs didn't sound natural with a cap, so I didn't bother. If you go for minimized GC, you actually need only 2 resistors, series and feedback, (you might use pot or coupling cap, if your source generates offset). Other than that, you need only 2 PS filtering caps and power supply itself. Pretty simple circuit and you can't go wrong with it. __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC
Banned

Join Date: Nov 2002
Re: Re: Goal: Build a GC without killing myself!

Quote:
 Originally posted by Peter Daniel You indeed sound like 15 years old with a condom in a pocket

Where did that come from?

diyAudio Member

Join Date: Jul 2002
Re: Goal: Build a GC without killing myself!

I thought you past that age already, SkinnyBoy. I guess it came from here:

Quote:
 Originally posted by GrahamnDodder I can't tell you guys how excited i am about this. I probably sound like a 15-year-old walking around with a condom in my pocket, "just in case." I already love my CMoy. This should rock. I am even thinking about building a CMoy headphone amp (as a totally separate circuit) into the final enclosure. Ahh, now there's a headphone jack one can be proud of...
__________________
www.audiosector.com
“Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

Banned

Join Date: Nov 2002
Re: Re: Goal: Build a GC without killing myself!

Quote:
 Originally posted by Peter Daniel I thought you past that age already, SkinnyBoy. I guess it came from here:

Well, I didn't actually bother READING the guys post, that would make my post increments too slow..

On Hiatus

Join Date: Nov 2002
GC without killing

Quote:
 Originally posted by SkinnyBoy Well, I didn't actually bother READING the guys post, that would make my post increments too slow..
Thanks Skinnyboy
for that hint.
Why haven't I thought of that myself?
and certainly not the first post (who cares of the subject ).

"GK without killing"
Is this a new "Peace-thread" ???

GrahamnDodder: OK, I've got my parts!

halojoy - think it real great to meet a guy
with some fresh and positive DIY entusiasm

- I know better than you do.
- No, you don't!
- Yes, I do.
- No, by the way, you stinks!
- You stinks yourself.

Moved to Texas by moderator X, with his little cherished Cap On Top

 8th August 2003, 01:05 PM #9 On Hiatus   Join Date: Nov 2002 dont take my laugh - away from me "don't take my laugh away from me cause I don't want to live in misery" /paraphrase from song "Breaking Up Is Hard To do" * * * * * I guess moderator roddyamam has not got same sense of humour as we have probably a boring type I have a feeling that GrahamnDodder himself would have gotten a good laugh by our comments he seems to be such a guy no harm done he can read our posts in "Off Topic" Texas-thread and get the laugh we wanted him to get halo - demands freedome of laughs (see "Marketing Terms" -thread for additional info)
 8th August 2003, 01:07 PM #10 Banned   Join Date: Nov 2002 Location: Adelaide, Australia Thats abit rude... if our posts were off topic then so was the first post in the thread (not that I read it in full, soemthing about "parts" and condoms..)

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