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Class D Switching Power Amplifiers and Power D/A conversion

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Old 17th January 2012, 08:59 PM   #1991
boone is offline boone  United States
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Greetings,

I have another question about hooking up my T2 special - smps300r combo. I'm
using a fused iec recp., popped the fuse out of the smps300r, to see what amperage it was, and couldn't read the markings on the fuse so went to the connexelectronics web site and to my old eyes it looks like the schematic specs a 10 amp fuse. Is that right? Seems too large to me and I don't want to fry the board if something shorts.

Thanks
boone
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Old 17th January 2012, 09:11 PM   #1992
alkasar is offline alkasar  France
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Quote:
Originally Posted by boone View Post
Greetings,

I have another question about hooking up my T2 special - smps300r combo. I'm
using a fused iec recp., popped the fuse out of the smps300r, to see what amperage it was, and couldn't read the markings on the fuse so went to the connexelectronics web site and to my old eyes it looks like the schematic specs a 10 amp fuse. Is that right? Seems too large to me and I don't want to fry the board if something shorts.

Thanks
boone
10A looks too large to me to! my 300R has a 2.5A fuse.
Mains in my country is 240V. I guess you'll have to pick 5A for 110V mains.
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Old 22nd January 2012, 06:05 AM   #1993
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My Hifimedy T4 and SMPS500R combo is now working. I connected them up to my Paradigm Mini Monitors v6 and the amp sounds great. I don't have much to compare it too, except my Yamaha RX-V767 receiver. Thanks everyone for your advice and help. I will post pics once I have finalized the case.
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Old 24th January 2012, 06:56 AM   #1994
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Wink RECYCLED PARTS USED !

Hi
This is a HifiMeDiy T2 installed in a broken pc-dvd box, painted in glossy black , with a wooden phase plate from my sons toys. On/Off switch comes from an old mini cooper !.
Sound is amazing, i had to change the epcos input caps with Theta PPMX 2uf bypassed with mkp1837 vishay caps though to achieve better dynamics.
External power supply used is a meanwell 27v dc (wth a wima 0.47uf mkp cap sorting negative with ground).
Vassilis
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Old 29th January 2012, 03:08 PM   #1995
lovro is offline lovro  Croatia
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Quote:
Originally Posted by hifimediy View Post
So it's ok on the output. I suggest you to re-solder the rp1 on the bottom.
well, you got me going around in circles now. I resoldered the rp1 the first time around.
I have attached the picture of the PR1.
Is the controller chip maybe at fault or something else?
Click the image to open in full size.
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Old 29th January 2012, 07:38 PM   #1996
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Hi there,
any heat issue with the T1 or T2 STA510 @ 36V?
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QED T260, Thorens TD-318, Marantz CD-43, TK2050, JBL 4313B & MJK's OB: music!
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Old 31st January 2012, 11:39 AM   #1997
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Default Hifimediy T1-M on 2x12V

Is it possible to run the T1-M off two 12V batteries connected in series with a 24V charger connected? The charging voltage would be 27.8V, which is too high for the amp spec, but well within the chip specs.
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Old 31st January 2012, 12:56 PM   #1998
nertia is offline nertia  Scotland
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Originally Posted by greententacle View Post
Is it possible to run the T1-M off two 12V batteries connected in series with a 24V charger connected? The charging voltage would be 27.8V, which is too high for the amp spec, but well within the chip specs.
Not sure this is a good idea, fully charged batteries tend to deliver more than their rated voltage. Also the bulk power cap on my board is rated 25V so 27.8V is over 10% more than its rating.

I think these boards are REALLY designed for low voltages. You might still get some good sound @ 24V with a T1 or T2 if cost/size is not an issue.
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Old 31st January 2012, 05:48 PM   #1999
zman01 is online now zman01  Bangladesh
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Default HifimeDIY and SMPS300R

Put together the T4 with SMPS300R - very nice results.

Thanks to forum member Kristielfur for pointing me towards this particular TK2050 based design. Friends who have heard the sound of the amp with my Alpair 12 Studio Reference Monitors really liked it.

Also thanks to user IBM5150 for helping out with the VC23 pre-amp. That one is up and running too. Nice preamp, but I like the sound of the T4 direct from source more.

-Zia
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Old 12th February 2012, 02:34 PM   #2000
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Quote:
Originally Posted by greententacle View Post
Is it possible to run the T1-M off two 12V batteries connected in series with a 24V charger connected? The charging voltage would be 27.8V, which is too high for the amp spec, but well within the chip specs.
Don't know about the M but the STA510A version gives you a bit more safety room for any cases ... I never tried charging while the board was connected with but it should work.
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