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DIY T-Amp User V2, TA2020 AIR CORES!, ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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ijan
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Nov 25 2008, 03:11 PM
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on the NOTE NUMBER 2, i think the T-amp can be made to do bi-amping which i intend to do with my 2x t-amp board..currently waiting for a cheap bookshelve to come by, mcm ada lubang for wharfedale 8 series or pinnacle shelves..haf to wait...
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Y.C.
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Nov 25 2008, 04:41 PM
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Ijan, do check out these brand new pairs of Denon SC-M51 2 bookshelf loudspeakers at RM390. Try to negotiate further with them (CMY Electronics) as during the KLIAV 2008 show, their show price is only RM299.
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ijan
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Nov 25 2008, 06:17 PM
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Sadly im in Sarawak..
However, a friend is offering a very minty black Wharfedale 8.1 at RM350, i think can nego to RM300. Only used as satellite. It has been replaced by the 9 series wharfedale, but at the price, any comment?
I don't want to thrift to much bookshelves since I am more into headphones, but eventually, when i have space and money, i would love to get a decent setup. But atm, testing testing rendam kaki in the water dulu.
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Y.C.
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Nov 25 2008, 09:06 PM
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I believe the nett SP of Wharfedale 8.1 would be in the region of RM800-RM900 previously. I've no personal experience with them but if this Audiofile review wayback in 2002 is anything to be relied upon, they should be pretty good. IMO, a single TA-2024 T-amp should drive them well unless you're very much into headbanging level. Enjoy.
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jazzy939
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Nov 25 2008, 09:31 PM
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I believe the Wharfedale will be a real 'punch'.. have heard them in the shops.. luckily I already have a good pair at home  Go ahead ijan.. make your day!
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TSxtorm
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Nov 27 2008, 12:57 PM
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oh the relay and buffer pre-amp to add too i suppose? tonight im free...duno got pc to use or not
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Najmods
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Nov 27 2008, 01:01 PM
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QUOTE(xtorm @ Nov 27 2008, 12:57 PM) oh the relay and buffer pre-amp to add too i suppose? tonight im free...duno got pc to use or not  If you want to put a guide regarding that, some not on buffer, if you using it it will almost eliminate the thumping noise when powering up, but you need to power up the buffer BEFORE you power up the T-Amp or the thumping will got worse
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ijan
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Nov 27 2008, 02:17 PM
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a simple on-delay that would reduce thumping by switching power to the T-AMP only after a certain level of voltage is available can be made with..few diodes, cheap jellyben opamp and a relay. it should werk, theoretically. But me, talk only, no action
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grandspy
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Nov 27 2008, 04:00 PM
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HUH?? Version 2 already? I've not even started yet!!! HELP ME!
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bsl555
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Nov 27 2008, 04:02 PM
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QUOTE(grandspy @ Nov 27 2008, 04:00 PM) HUH?? Version 2 already? I've not even started yet!!! HELP ME! Concentrate on improving your vinyl TT passion may benefit you more lah!.
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Monkey King
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Nov 28 2008, 12:49 AM
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i replaced the stock JNC 470 uF to panasonic FM 470uF 25V... not much improvement sounds to me...  anyone tried expensive boutique input caps yet? (Mundorf...Wonder Cap, Solen, Auri?)
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bsl555
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Nov 28 2008, 01:11 AM
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QUOTE(Monkey King @ Nov 28 2008, 12:49 AM) i replaced the stock JNC 470 uF to panasonic FM 470uF 25V... not much improvement sounds to me...  anyone tried expensive boutique input caps yet? (Mundorf...Wonder Cap, Solen, Auri?) Contrary to popular belief, caps take time to run in. I changed lots of china capacitors in my subwoofer to Panasonic FC's and the improvement wasn't immediate. Having said that, change to boutique caps is no guarantee of improvement. Its installing the right type of cap at the important part of the circuit that'll contribute to improvement. BTW, those brand caps you mentioned are more suitable and beneficial for tube amplifiers...not T-amp. This post has been edited by bsl555: Nov 28 2008, 01:12 AM
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Y.C.
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Nov 28 2008, 01:43 AM
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I'd agree fully with Bsl’s comment above.
I replaced the stock 220uF 25V caps on my 1st board with Panasonic FM 1000uF 16V ones. First impression is not much of difference lah and what a waste of money! How wrong I was as I discovered later the bass and its weight was way too much for my liking and it overpowered the "micro details". I subsequently replaced them with Panasonic 470uF 25V ones. Moral of story, real sonics could only be realised after a while, ie. after running in the caps.
On input caps, a change from stock caps to more decent ones like Vishay MKT1813 you're having would tell the diff almost immediately. Nevertheless, if you were to do a comparison with another unit with stock caps on board now, the diff is even more pronounced. Do spend the money saved from not buying boutique caps for a better vol pot for better transparency and musicality.
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cyl1000
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Nov 28 2008, 07:23 PM
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Getting Started

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My second pot from JP fail again..1 channel is louder than the other unless I really crank up the volume that both will be balance. Now the T-Amp is left aside waiting for Alps pot to be in.. Apart from the two caps, what minor mods can be done to further improve the sound? Getting bigger resistors/caps to replace those SMD will make the T-Amp look ugly
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bsl555
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Nov 28 2008, 07:43 PM
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QUOTE(cyl1000 @ Nov 28 2008, 07:23 PM) Apart from the two caps, what minor mods can be done to further improve the sound? Getting bigger resistors/caps to replace those SMD will make the T-Amp look ugly  Improve the sound?  .. replacing to bigger sized resistors and caps is in practice, dirtying up the sound and increasing the distortion figures.
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jazzy939
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Nov 28 2008, 08:25 PM
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You're one unlucky bloke!  You have my sympathy ler.. I have bought many pots from JP.. so far they're ok. Guess I am lucky  You gotta be careful where you buy stuffs in JP. My stuffs mostly from NIXIE. My next alternative choice would be MAPLIN. Now that your ALPS is on the way.. SMD replacement is no minor mod. Ugly or not, its not about looks, its about SQ. Its gonna be in a box/casing anyway. You worry about how your T-Amp looks?  QUOTE(cyl1000 @ Nov 28 2008, 07:23 PM) My second pot from JP fail again..1 channel is louder than the other unless I really crank up the volume that both will be balance. Now the T-Amp is left aside waiting for Alps pot to be in.. Apart from the two caps, what minor mods can be done to further improve the sound? Getting bigger resistors/caps to replace those SMD will make the T-Amp look ugly 
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gabanyayaya
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Nov 28 2008, 08:56 PM
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QUOTE(cyl1000 @ Nov 28 2008, 08:23 PM) My second pot from JP fail again..1 channel is louder than the other unless I really crank up the volume that both will be balance. Now the T-Amp is left aside waiting for Alps pot to be in.. Apart from the two caps, what minor mods can be done to further improve the sound? Getting bigger resistors/caps to replace those SMD will make the T-Amp look ugly  I guess I'm not the only one having a bad luck in JP....now a defected pot also....haiyya....manya takut wo mau shopping in JP......
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jazzy939
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Nov 28 2008, 08:59 PM
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FYI, NIXIE/MAPLIN is not in JP.. It's on Jalan Landak!
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bsl555
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Nov 28 2008, 09:13 PM
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Errr.. you can get unlucky on other components too..like other value resistors accidently mixed up with the actual values you want. Thats why I bring my own multimeter and magnifying glass. My eyesight ain't all that good nowadays.
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jazzy939
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Nov 28 2008, 09:19 PM
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Mixed up parts sometimes happen.. Never brought my own DMM, but if you ask for it, they will lend you one. One shop even offered the DMM if I want to use..  Normally those cheap passive components, I will buy X2! Just for spares.. and stock up. So far I have been lucky..
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