There is nice VU in thread http://www.diyaudio.com/forums/solid-state/235892-1000w-simple-pa-amplifier-80.html
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You have nothing to do with this. I solder up and test what I choose. If you want a completed amp you are more than welcome to do the work yourself.
Here's a ready made LED VU (microcontroller adjustable modes) for $10.
Online Shop MCU Adjustable Display Pattern LED VU Meter Level Indicator 16 LED Dual Channel|Aliexpress Mobile
I built two of the A class PSU's I just didn't have one handy. This is a Jung regulator and is stellar.
Sorry - I hope no offense was taken - I just meant that you are so prolific with builds that I wondered what it took for a build to get into a boxed up stage. The suggestion from ApexAudio for pairing the A40 and P30 was an outcome of me asking him what his favored amp was. Of course what you build and box up is your choice.
Mr. Mile, whats the difference between A class PSU and shunt regulator in terms of SQ? Will it make a big difference in SQ? I had made a layout with tidu active volume controller paired with shunt regulator, thats why I am asking.
reg
prasi
Hi Mile,
I noticed today that I have some offset on the output of the P30. There is no adjustment. Where would I make changes to correct this? The A40 has an input cap so it isn't an issue but some amps are DC coupled so it would be for those.
I noticed today that I have some offset on the output of the P30. There is no adjustment. Where would I make changes to correct this? The A40 has an input cap so it isn't an issue but some amps are DC coupled so it would be for those.
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still4given
Try with these simple adjustment arrangement, for 22uF use nonpolar/bipolar type
Try with these simple adjustment arrangement, for 22uF use nonpolar/bipolar type
An externally hosted image should be here but it was not working when we last tested it.
What is the measurement offset?
This is a symmetry circuit and many of the parts must be matched,especially the transistors.
CFA topology have high DC offset without DC servo circuit, P30 use output cap so +/-1V before cap is not problem. Use nonpolar/bipolar 22uF output cap as Dragan already suggest.
Regards
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IRFP240/9240 substitute for FX8?
ApexAudio,
Can IRFP240/9240 be used instead of specified mosfets?
ApexAudio,
Can IRFP240/9240 be used instead of specified mosfets?
No you can't replace Lateral mosfet with vertical mosfet. You can use other lateral mosfets from Exicon or Semelab.
Thanks. Any recommended alternatives as these are kind of hard to get from a regular supplier like Mouser and Digikey. They seem to be availnale on eBay only.
You can buy Exicon mosfets from www.profusionplc.com shipping to US is cheap if you use airmail.
Forgot about Tayda Terry buys 2SK1058 and 2SJ162 from them, I have also bought mosfets from them.
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Hi guys,
I found the issue with the offset on my P30. These were built using Alex's layout. He had the 47k resistor before the output cap so nothing was loading it.
I moved it to be after the cap and now all is fine.
I found the issue with the offset on my P30. These were built using Alex's layout. He had the 47k resistor before the output cap so nothing was loading it.
I moved it to be after the cap and now all is fine.