Sorry, I meant to mention the power supply, which was two 12V SLA batteries in series, about 26.5VDC - which is how I plan to use the amp. So it wasn't max'ed out to 36V for maximum power.
For the Zobel, I used exactly the same values as you (10ohm and 0.47uf). I tried to get close to the Sure schematic values. I noticed that the Tripath datasheet values are 15ohm and 0.22uf.
Mike
For the Zobel, I used exactly the same values as you (10ohm and 0.47uf). I tried to get close to the Sure schematic values. I noticed that the Tripath datasheet values are 15ohm and 0.22uf.
Mike
I use a 24v 14.5A Meanwell SMPS to power a 41hz amp9-basic (4x100w). I have them in the same case just a few cm away. I have no problems with noise from the smps.
http://minirig.org.au/2008/05/28/minirig-41hzcom-amp9-basic/
col.
http://minirig.org.au/2008/05/28/minirig-41hzcom-amp9-basic/
col.
ok got that thing working great now.
i got an 225VA transformer from a friend, but after diodes and big capasitor it gives me 37.7V with the board connected.
and that is 1.7V to much.
well it works great so maybe i just but 3 or 4 diodes in it, to get 36V.
but it gets HOT
really HOT
my temp sensor (its not good, normally about 5 degrees c off) gives 98 degrees celc after 1 hour of music.
and that is when its on my desk, in a case i guess it would get hotter.
so i wanted to get the heatsink off and make a better one on it.
but i dont get it off
and i dont want to snap the board in 2
any tips how to get it off without breaking the board or my screwdrivers, they glued it on i guess.
i got an 225VA transformer from a friend, but after diodes and big capasitor it gives me 37.7V with the board connected.
and that is 1.7V to much.
well it works great so maybe i just but 3 or 4 diodes in it, to get 36V.
but it gets HOT
really HOT
my temp sensor (its not good, normally about 5 degrees c off) gives 98 degrees celc after 1 hour of music.
and that is when its on my desk, in a case i guess it would get hotter.
so i wanted to get the heatsink off and make a better one on it.
but i dont get it off
and i dont want to snap the board in 2
any tips how to get it off without breaking the board or my screwdrivers, they glued it on i guess.
These Sure Electronics tripath boards are crap !
I used a 2 x 100W to fix a Sessionette 75 Double Twelve with broken ILP module's
http://www.award-session.com/pdfs/Award-Session History0012.pdf
Preamp and speakers were tested before the Sure Electronics board was connect and found to be ok. Powersupply was 30Vdc.
Within 1 hour a sizzeling sound was heared, the fuses blow and the board was death. After lifting the heatsink this was found:
Some of the pins have just vaporized
So far Sure Electronics hasn't replied to any of my emails and the complaint made though Ebay and PayPal, I afraid the 42$ I paid for it are lost.
I used a 2 x 100W to fix a Sessionette 75 Double Twelve with broken ILP module's
http://www.award-session.com/pdfs/Award-Session History0012.pdf
Preamp and speakers were tested before the Sure Electronics board was connect and found to be ok. Powersupply was 30Vdc.
Within 1 hour a sizzeling sound was heared, the fuses blow and the board was death. After lifting the heatsink this was found:
An externally hosted image should be here but it was not working when we last tested it.
Some of the pins have just vaporized
So far Sure Electronics hasn't replied to any of my emails and the complaint made though Ebay and PayPal, I afraid the 42$ I paid for it are lost.
From the Sure Electronics AD on Ebay:
Didn't give me the impression I needed to add a fan.
"just for you" , yeah right as long as you pay and don't complain ...
Didn't give me the impression I needed to add a fan.
An externally hosted image should be here but it was not working when we last tested it.
"just for you" , yeah right as long as you pay and don't complain ...
Hello sayang001,
Sorry to hear of your problem.
Noticed from the PDF you attached that you were using the Sure board as a guitar/musical instrument amp. Don't have enough knowledge myself, but maybe the Sure/T-Amp boards are not so suitable for that use. (Distortion/overdrive/guitar transients etc ?)
Maybe someone with more knowlegable about such things could confirm or deny.
Simon
Sorry to hear of your problem.
Noticed from the PDF you attached that you were using the Sure board as a guitar/musical instrument amp. Don't have enough knowledge myself, but maybe the Sure/T-Amp boards are not so suitable for that use. (Distortion/overdrive/guitar transients etc ?)
Maybe someone with more knowlegable about such things could confirm or deny.
Simon
well maybe if your powersupply is to high and your guitar and everything is on max you can blow it up.
but according to tripath datasheet it got a overheating protection.
but e-mail them and try to get your money back.
and without fan it works, but gets really hot.
and normally the board can handle it.
but according to tripath datasheet it got a overheating protection.
but e-mail them and try to get your money back.
and without fan it works, but gets really hot.
and normally the board can handle it.
Letting the smoke out...
I fried a 50 watt board yesterday. Went to all the trouble of upgrading it, everything tested fine, then I mounted it in a case. Forgot to connect the ground from the input to the PCB, turned it on and fried the amp chip.
PS: One thing I noted after modding the unit, but before killing it: increasing the input cap from the 1uf stock to 2uf (as many have recommended) corrected the frequency response at 20Hz from -0.7db to -0.15db.
Mike
I fried a 50 watt board yesterday. Went to all the trouble of upgrading it, everything tested fine, then I mounted it in a case. Forgot to connect the ground from the input to the PCB, turned it on and fried the amp chip.
PS: One thing I noted after modding the unit, but before killing it: increasing the input cap from the 1uf stock to 2uf (as many have recommended) corrected the frequency response at 20Hz from -0.7db to -0.15db.
Mike
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