Huh?

If the pot is in line with the source, there shouldnt be a difference in volume. If there is, something is wrong.

A larger value merely means more input impedance, noise and tracking. Nothing else. If you pay attention carefully the pot is wired as a voltage divider. Since the input of the amplifier is very high (assume infinity), this means that the subsequent stage has a very stiff loading and it should not affect the voltage transfer at all. Do remember that an amplifier is also an impedance transformer.


One should use as low as possible, without sacrificing noise and tracking capability. EDIT: Of course, also not too low until it suffocates the source.

This post has been edited by LittleGhost: Jan 30 2009, 10:48 PM

hi xtorm

me from indonesia. neighboring country. yesp ta2024 looks good with my existing 85db 2 way speakers. it plays quite loud. could shake the house. will try the dc offset mod to zero and other discrete components. maybe give the arjen board few days. as it clear up quite nicely in upper register. nice nice.

on other forum, a user seems to prefer ta2020 such as charlize over the ta2024. how do you guys find?

can i use headamp with my mp3 and loudspeaker? or only for headphones?

yep give it some time to run in, if the highs is harsh, 3.3uf input cap is good

it is for loud speaker, it is not a headphones amp

Hi guys, Gong Xi Fa Cai..been busy with my newborn baby and now only finish 90% of my T-amp in a proper casing..attached is the picture (taken with camera phone, not so clear). It is spray painted in champion white (that is the color code I was told) as my friend do not have the pearl white which I initially planned for. I've not touch up the power button yet.. For the blue LED at volume knob, its a bit too dim, maybe have to get a brighter blue LED as I thought the low brightness type is sufficient...


Attached thumbnail(s)

ME LIKELY!!!

Hammond spraypainted?

nice touch. is that the aluminium case? where do you get it? i saw one guys sell it on ebay, been thinking bout that but havent pull the trigger

No..send to Honda workshop and they use the Type R white....but I really would prefer pearl white...maybe add in a red color line at the volume knob would look sportier

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Added on February 1, 2009, 11:43 amBought the alum case from Nixie. The difficult part is to get a nice volume knob so I salvage from an old Onkyo amp..but I still need to get allen screw and painted it white to replace those ugly philips screw..

This post has been edited by cyl1000: Feb 1 2009, 11:43 AM

I really must get my hands on that aluminum case.

Eurocard size I presume? How much is it?

How much do they charge for that kind of spray service. It does give me ideas for giving it a commercial look.

The alum case cost more than the T-amp..for the spray service..FOC coz sending car for them to service regularly.. How commercial you had in mind??

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Added on February 1, 2009, 11:55 amBTW, the case price is RM100..

This post has been edited by cyl1000: Feb 1 2009, 11:55 AM

Allu Alloy?

It's slightly cheaper than the Hammond Equivalent. Boleh consider.

How commercial? Maybe spray painted logo/words using templates. Perhaps cheaper than regular laser etching?

Geez.. shouldn't have spray painted the knob...looks wierd if you ask me, nevertheless your preference lah.
I've got my own 2k paint spray gun and compressor and maybe economical if spraying many items but its bloody hazardous to the lungs and spraying 1 or 2 small items including all that trouble may not make economical sense.
The paint costs some RM30 for half litre from a specialized auto paint shop and the special thinner is another RM25. Go do the maths.
A well equipped motorbike shop does offer spray painting, AFAIK. They respray custom colors for owner's bike visible painted components.

The original color of the knob is silver..Adding some color (maybe red) to the knob as an indicator might do the trick...i agree with you..ownself spray paint is hazardous and time consuming and need expertise to make sure the finishing is nice..i think if pass to ppl to do the job is better and faster..

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Added on February 1, 2009, 12:11 pmYeah..allu aloy..I have tried using templates to spary wordings for my DIY project last time..result weren't that good

This post has been edited by cyl1000: Feb 1 2009, 12:11 PM

wow very nice cyl!!!

is the casing hard to work with?

i see you still using adapter, nvr try smps yet?

there is some goodies beside the T-amp too? el-34? how does the t-amp compare?

Try look for "ARROW" brand spray paint, got the Metallic Pearl White, just not sure will it bond well on Alu Aloy surface.
About the vol knob LED, the difficult part is to get an "even" look of the brightness as the LED is hiding behind

The casing is not hard work..the hard work now is the power switch..to touch up a black color switch to white with brush. I have tried spray but doesn't work as the side of the rocking switch is too tight and scrape the paint out..i have not tried cage type smps yet..the smps adaptor should be sufficient as it is rated 5.2Amp.
As for the tube amp, its from ebay . Bought it after reading some comment from DiyAudio forum and have not start tweaking yet..At the moment, T-Amp is use to drive Epos M5 and source is the ol' trusty Marantz CD63 (modded) & Arcam BB DAC.

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Added on February 2, 2009, 10:14 amI will just stick to the present color as I might spoil the case if I respray. I was looking for a light diffuser/guide that fits that diameter of the volume knob but so far no luck. The only choice now is to use brighter LED and maybe add few more piece of LED..

This post has been edited by cyl1000: Feb 2 2009, 10:14 AM

How many LEDs did you used? Two? Guess you're gonna add another two, right?
I am thinking how to get the LED light to be distributed equally around the pot knob..

I use 4pcs (Up, Down, Left, Right). Maybe add 2 more will be ok???

hi guys

i am using 3A regulated ic power supply. sound not bad. just wondering if the meanwell smps going to be better investment? found in ebay sell for usd$39 for 12v 12A. bit overkill. just wondering how much you got this locally?

there is "Rayed" brand, for only usd $17 for the 5A. just wondering if you guys have any experience on this? thx

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...&category=60839

This post has been edited by milen007: Feb 2 2009, 01:14 PM

A higher PSU for any amplifier is seldom an "overkill". It matters most of how clean the DC output which noise, ripple and stability which are undesirable. Well design amps are bulky and heavy because of the weight of transformer and PSU. Surely they don't do this for fun. They could have put in any old SMPS PSU if they didn't care. SMPS is mostly meant for industrial applications and of course a cheap alternative for audio DIY'er. 3 Amps PSU is bare minimum.