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DIY T-Amp User V2, TA2020 AIR CORES!, ~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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ar188
post Dec 27 2008, 01:41 PM

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QUOTE(cyl1000 @ Dec 27 2008, 12:58 PM)
I just got 1 of those alum casing from Nixie and plan to send it to be respray..maybe like Ipod bone white  tongue.gif
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nice, post the pic after respray.. gloss pearl white.. yummy..

or you can go anodized black... with 3mm diffused blue LED "on" indicator.


Added on December 27, 2008, 2:01 pm
QUOTE(kww @ Dec 12 2008, 11:40 AM)
Hi YC, thank for your components. I spend the whole day on t-amp yesterday. Check my old equipment, check the discrete components from you and my left over from other project that done years ago, went to JP to get the balance that i don't have. Putting it piece by piece until 2am this morning. I just test for functionality but not yet connect to my bookshelf speaker yet. No smoke come out, got sound to testing speaker. Tomorrow will find time to do more testing. I do hear hissing after the upgrade, will test further.

Here is some pictures.
wow, nice "surgical" job putting radial film caps into SMD 0805 solder pads..


This post has been edited by ar188: Dec 27 2008, 02:01 PM
ar188
post Dec 27 2008, 02:30 PM

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yes usually pots have A or B curves, linear, log etc. even JP ones, not limited to alps/nidec etc..

also another parameter for choosing pots is the size, like 12mm ,16mm and 20, 24mm etc that controls the power handling..
ar188
post Dec 28 2008, 07:09 PM

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QUOTE(cyl1000 @ Dec 28 2008, 06:21 PM)
Thought of anodized but hard to get a good job done..send to a shop at sunway before but they just did a "chin chai" job. As for power LED, thought of getting a circular LED light pipe to put around the volume knob. So far, no luck yet from Farnell, RS or Futurlec . I will have to get these parts ready before I can proceed to drill and then spray.


Added on December 28, 2008, 6:26 pm
I got the big casing measuring 253x167x87. Hmm...what do you mean by the slimfit RCA n binding post? Have you tested the pots? Which shop you buy from? One of my friend JP pot is failing  sweat.gif Have to help him get a temporary pot.

BTW, anyone can help to source for a circular LED light pipe???
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how does your circular LED light pipe look like?

you need LED or not? I got lots.. SMD white, blue etc..
ar188
post Dec 29 2008, 02:00 AM

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QUOTE(cyl1000 @ Dec 29 2008, 12:57 AM)
If you look at those midi hifi, some have lights illuminating form the volume knob (Y.C. JVC micro have it). I have attached a picture from another thread..looks something like this.
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thanks for the pic, maybe the inner knob holder (to clip and hold to the pot's fluted or geared shaft) is made of transparent plastic material? and can be used to act as "light guide"
ar188
post Dec 30 2008, 08:55 AM

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QUOTE(cyl1000 @ Dec 30 2008, 08:48 AM)
I can't wait and have started on the casing. I have drill most of the holes for the RCA, volume control, speaker binding..for power switch, thinking to use round (push in to ON) or rectangular (push up/down). For the volume knob with LED, I've got a big knob from an old donor amp (Denon) and most probably drill 4 holes in casing but hide inside the knob. Use VR to adjust the LED brightness and hopefully will get the effect.
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wah use VR to adjust the LED brightness? so when you turn it will have variable brightness?
ar188
post Dec 30 2008, 02:22 PM

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QUOTE(jazzy939 @ Dec 30 2008, 11:58 AM)
VR as in voltage regulator?
3V is what u need depending in LED types and the brightness that u want...
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variable resistor aka Pot kua.. but not sure it'll work cos LEDs are current source devices ...


ar188
post Dec 30 2008, 06:49 PM

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if you fellas want blue and white LEDs let me know.. give you free la.. got so much in the drawers...
ar188
post Dec 30 2008, 06:51 PM

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QUOTE(jazzy939 @ Dec 30 2008, 11:58 AM)
VR as in voltage regulator?
3V is what u need depending in LED types and the brightness that u want...
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3V and above for white and blue and pure greens, InGAN dice

for red and amber/yellow, 2V-2.2V should be more than enuf.. or else poooofff....
ar188
post Dec 30 2008, 06:58 PM

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QUOTE(jazzy939 @ Dec 30 2008, 06:53PM)
ar188,
I need some! Some blue ones would be nice! This is for my 'new' amp.. wink.gif

Added on December 30, 2008, 6:56 pmcyl1000,
a 40V tranny would be a good candidate to power a GainClone! wink.gif
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sure.. 5mm 3mm SMD 1206 or 0805s? biggrin.gif

can demo your amp ar? I bring my AE near-field bookshelfs to test test.. hehe!
ar188
post Dec 30 2008, 07:09 PM

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jazzy, how big are your JP pots, the diameter of the back cover. 12mm 16mm etc? see if got any surplus 50k Log scale ones for you..
ar188
post Jan 3 2009, 12:55 AM

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QUOTE(jazzy939 @ Jan 3 2009, 12:30 AM)
grandspy,
the Meanwell SMPS looks better and 'cuter' wink.gif with adjustable voltage! biggrin.gif
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definitely cuter..and available in wide single voltage range and formfactors...
besides no need 350W to 500W monster computer PSUs with fans and dangling cables...
ar188
post Jan 3 2009, 11:31 PM

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QUOTE(jazzy939 @ Jan 3 2009, 11:23 PM)
Enermax. Are they 'good'? hmm.gif
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probably "decent"..taiwan/china made. not same level as the american brands (which is also made in china) due to the BOM.
I believe BSL wants the PSU to be equipped with branded subcomponents used inside..
of which the BOM (bill of materials) would be made up of branded manufacturers..
ar188
post Jan 4 2009, 12:28 AM

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QUOTE(bsl555 @ Jan 3 2009, 11:37 PM)
PSU's are mostly run of the mill stuff and perhaps middle quality at best. Just that the current output is adequate for current PC requirements. You're not going to find usable resistors, IC's, transistors or the capacitors which are mostly sourced from China and brands you've not heard of. They're built to borderline architecture and will fail in good time.
You want really good parts from PC related peripherals, gut your CRT monitor, especially the older models.
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I was just stressing that from US branded PSU or UPS (like APC brand for example) at least they are using things Evox, AVX, Nichicon or Dale vishay i.e branded (doesn't mean their MIL spec parts range or audiophile grade).. whereas in normal taiwan/china brands PSU, most likely using local china grade components rather than export grade.


as for me, if I need good parts I get them for free.. no need to salvage,. unless it's EOL. (end of life)
ar188
post Jan 4 2009, 12:46 AM

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QUOTE(jazzy939 @ Jan 4 2009, 12:34 AM)
ar188,
Not all of us are lucky to be in your position! wink.gif
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soon you will be.. (getting them for free also) tongue.gif

"one good deed deserves another" one samaritan said to me earlier today.. rolleyes.gif smile.gif cheers!

so will try to share some of the JP style pots and Large Ecaps with you guys here.... (at least these I know they will sure give few extra pcs free when I load in my main orders hehe)

jazzy, will PM you E-cap datasheet for you to choose.
ar188
post Jan 4 2009, 12:56 AM

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QUOTE(jazzy939 @ Jan 4 2009, 12:50 AM)
hehehe.. thanks ar188! biggrin.gif

hokay.. will be waiting for that!

just wondering when you're gonna start to diy? wink.gif
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wei.. liddat called cheating..

wah, if every component in the project, I get free 5-10pcs liddat sure got surplus to make a few free boards.?? biggrin.gif


ar188
post Jan 4 2009, 01:03 AM

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QUOTE(jazzy939 @ Jan 4 2009, 12:58 AM)
cheating? where? : laugh.gif

free boards? possible! biggrin.gif
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surely I may need at most 2 units if running mono blocks.. the excess 3-5pcs excess components leh?
BTW, I found the "aunty" to solder my future boards.. I met the person this evening.. thumbup.gif

This post has been edited by ar188: Jan 4 2009, 01:05 AM
ar188
post Jan 4 2009, 02:16 AM

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QUOTE(jazzy939 @ Jan 4 2009, 01:56 AM)
good for you! aunty have own soldering iron/gun? wink.gif
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should have kua, hakko brand I think.

BTW I met the so called "aunty" around 5+pm today to pass some LEDs.. biggrin.gif


ar188
post Jan 5 2009, 12:07 AM

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QUOTE(bsl555 @ Jan 4 2009, 06:55 PM)
Line it all up on a thick black spectacles in flashing mode, raise eyebrows and blink the eyes at you???  tongue.gif
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hehehe!

actually the aunty is "jazzy"... tongue.gif he has to solder my boards in xchange for free components.. tongue.gif tongue.gif

 

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