apex...
sir
i just got home
i did what you told me...
amp is now working fine...
hum is a bit present...
but audio is clear...
tnx sir...
i highly appreciate it...🙂🙂🙂🙂🙂🙂😛😛😛😛😀😀😀😀😀
apex...,
sir...,
i will start building second channel about this week...
will 8 pairs of output transistors be enough to power up 2 15" 600w instrumental speakers for mids???...🙂
tnx...
regards...
sir...,
i will start building second channel about this week...
will 8 pairs of output transistors be enough to power up 2 15" 600w instrumental speakers for mids???...🙂
tnx...
regards...
Hi,apex,.my projct for b500 will be finished,.but CAN I remove/replace nsl32 with other compnent,bcause it's verry hard to find here,Then explain how to wire it?THANKS.
B500 can work without limiter (nsl32), and you can put led diode instead nsl32 for clip indicate (post #418),
Regards
Last edited:
sir...
i replaced nsl 32 with a regular LED and a 47k resistor...
how will varying this resistor effect the amp???...
if i vary this 47k resistor to 100k or lower it down to 22k...how wiwll this change take effect on the amp???...🙂🙂🙂🙂🙂
hello diy'ers can anyone send me a complete schematic, pcb layout and component placement guide for apexaudio b500 amp? My email is jlcastro77@yahoo.com. I am planning to build 1 channel to be used as subwoofer aplifier. If you can include the recommended PSU, speaker protector and power on delay circuit i would appreciate.
Regards
Regards
sir,...
everything you need is in the thread...
reading the pages would certainly give you everything...
it will also give you ideas on how to build the circuit base on sir mile's advices...🙂🙂🙂🙂
regards...
what should be the transformer spec for 2 channels running at 500W at 4E....
i have started collected all the parts for b500 will upload pic soon
regards
sekhar
i have started collected all the parts for b500 will upload pic soon
regards
sekhar
This is my 500a B project is still in the stage of manufacture of PCBs and are collecting components
![URL]](https://www.diyaudio.com/forums/[URL=http://img708.imageshack.us/i/100716191450.jpg/][IMGDEAD]http://img708.imageshack.us/img708/1690/100716191450.jpg[/IMGDEAD][/URL]%20%20Uploaded%20with%20[URL=http://imageshack.us]ImageShack.us[/URL])
sir i calculated the psu requirement in the the following way
P=V X V / R
root over of 500 X 4 = V
that is = 45V approx
current requirement = V/R
assuming 45 V Secondary = 45/4 = 11.25A per channel
so the transformer rating required as per my assumption will be 45-0-45 @ 23A for stereo Operation for 500W at 4E, that equates upto = 2070VA
sir,
there is some thing that I dont understand about designing Psu For an amp ...... what wrong am i doing kindly guide me through.....cause ur and my calculation r nt matching what am i missing .........
regards
sekhar
P=V X V / R
root over of 500 X 4 = V
that is = 45V approx
current requirement = V/R
assuming 45 V Secondary = 45/4 = 11.25A per channel
so the transformer rating required as per my assumption will be 45-0-45 @ 23A for stereo Operation for 500W at 4E, that equates upto = 2070VA
sir,
there is some thing that I dont understand about designing Psu For an amp ...... what wrong am i doing kindly guide me through.....cause ur and my calculation r nt matching what am i missing .........
regards
sekhar