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a 'candy box' size amp ~

post #1 of 16
7/26/10 at 6:49am
Thread Starter 

this amp is from a hk diyer,which is a kit built for diyers

juz small enough to be put in a candy box~

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

looks pretty neat isn't it?

the opamp is changeble

 


Edited by charlesklw - 5/3/12 at 10:57am
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post #2 of 16
7/26/10 at 6:54am

Very nice and rather complex DIY design for such a small footprint.

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post #3 of 16
7/26/10 at 8:01am

very cool indeed!!, where can I get the kit?? I would love to build a couple of these up as presents. the picture wont blow up and I have a high rez screen, so cant read anything, but since it appears to be USB chargeable, that special thing could be low voltage like 3.7v?? it looks like an ipod battery. or is it high and using a DC to DC converter to charge with USB to a higher voltage?

 

its small, but he could make it a lot smaller by using SMD parts for everything looks to be well thought out and should beat out a mint tin cmoy fairly easily with a good opamp. come-on spoil the surprise, what is the supply voltage? this matters a great deal to what opamps are useable. making it all SMD would make it much less accessible to a wide audience as many people are afraid of soldering SMD; I actually prefer it, I can build smd designs much faster than through-hole 

 

the problem I see if its not a common type lion battery, is shipping could be very expensive and there are only a few services that will ship lithium based batteries.

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post #4 of 16
7/26/10 at 8:17am
Thread Starter 

the kit includes the li-ion battery

 

actually the voltage is transformed to +/- 12v

 

the parts on the corner of the circuit board will perform such func.


Edited by charlesklw - 7/26/10 at 8:19am
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post #5 of 16
7/26/10 at 12:47pm

Where it at?

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post #6 of 16
7/26/10 at 6:00pm
Thread Starter 

??

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post #7 of 16
7/26/10 at 8:52pm

yes, well I will be interested in seeing how much shipping outside asia is, because lion is the most dangerous of the lot and carriers charge accordingly. although I do have to say its cheaper from asia n services like DHL and EMS. ahh OK I thought it might be a DC to DC boost convertor, but had it before the battery after the USB to up the charge voltage from usb. I would guess the amperage suffers though. but hey I dont care, please tell me where they are and i'll buy a couple ;)I saw the trnsformer there, but figured it was to do with isolating the USB input so you could use it while charging nicely. where can I see the schematic full size?? I actually couldnt see the transformer there in the bottom left last night at 3am.


Edited by qusp - 7/26/10 at 8:56pm
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post #8 of 16
7/27/10 at 12:28am

I'd like to try making one of these.  I have a bunch of Godiva tins that would look great for this.


Edited by batphink - 7/27/10 at 2:54am
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post #9 of 16
7/27/10 at 12:30am
Thread Starter 
Quote:
Originally Posted by qusp View Post

yes, well I will be interested in seeing how much shipping outside asia is, because lion is the most dangerous of the lot and carriers charge accordingly. although I do have to say its cheaper from asia n services like DHL and EMS. ahh OK I thought it might be a DC to DC boost convertor, but had it before the battery after the USB to up the charge voltage from usb. I would guess the amperage suffers though. but hey I dont care, please tell me where they are and i'll buy a couple ;)I saw the trnsformer there, but figured it was to do with isolating the USB input so you could use it while charging nicely. where can I see the schematic full size?? I actually couldnt see the transformer there in the bottom left last night at 3am.



I think this amp is not for sale yet(imean to other countries),I'll help u ask the producer and see if he's willing to ship it or not.....

 

actually those pics are from the producer,let me see if they would like to upload a clearer image

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post #10 of 16
7/27/10 at 12:39am

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post #11 of 16
7/28/10 at 12:02am
Thread Starter 
Quote:
Originally Posted by batphink View Post

I'd like to try making one of these.  I have a bunch of Godiva tins that would look great for this.



 

 

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post #12 of 16
7/31/10 at 12:03am
Quote:
Originally Posted by charlesklw View Post





I think this amp is not for sale yet(imean to other countries),I'll help u ask the producer and see if he's willing to ship it or not.....

 

actually those pics are from the producer,let me see if they would like to upload a clearer image


can you provide a link or contact for local sale? I have plenty of customers in your part of the world and perhaps I could ask one of them to get me one. but of course that would be great if you could ask if he will sell me a couple directly. he may be hesitant to sell internationally because of the support/language issue and the battery shipping thing I mentioned


Edited by qusp - 7/31/10 at 12:04am
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post #13 of 16
7/31/10 at 6:18am

I can help out, I eat a pack of Eclipse a day 

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post #14 of 16
7/31/10 at 8:27am
Thread Starter 
Quote:
Originally Posted by qusp View Post




can you provide a link or contact for local sale? I have plenty of customers in your part of the world and perhaps I could ask one of them to get me one. but of course that would be great if you could ask if he will sell me a couple directly. he may be hesitant to sell internationally because of the support/language issue and the battery shipping thing I mentioned



 

 

 

u're right,the battery issue is juz like the situation of mini3(international ver. without battery and charger),but for the support part,there'll be some amazing news later

 

i'll give you the link as soon as possible (actually i'm a friend of the producer so i can get this little thing first)

the producer told me tat there's still something to correct&test and so the day to announce it as a finished product will be pushed a little bit backwards till mid Aug.(i guess only~the release date is still unsure)~

 

 

btw,I think he intends to sell it overseas,so maybe there will be a link (maybe ebay)later,

 

p.s.there's another product from the same designer,you may take a look too~http://www.head-fi.org/forum/thread/498845/a-mini-tube-amplifier-from-hong-kong


Edited by charlesklw - 7/31/10 at 8:32am
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post #15 of 16
7/31/10 at 8:34am

no problem, yeah the shipping guidelines with lithium batteries have caused all sorts of issues. glad hes(maybe) open to international sales. I can wait, its not for me anyway, but rather a present, but with something this size it could be implemented dual mono for balanced ;) nah tubes dont really do it for me i'm afraid, SS FTW :D

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