try AX-11 and is pretty detailed in sound 
don't mind about my ugly set up I care for good sound and also there is a lot of options to chose from mister Willie has many layouts styles to chose from too. sorry the question was directed to mister Miles
best regards
Juan
don't mind about my ugly set up I care for good sound and also there is a lot of options to chose from mister Willie has many layouts styles to chose from too. sorry the question was directed to mister Miles best regards
Juan
Attachments
The frequency response of the amplifier is perhaps suffering from problems of your sound card, too many high-frequency oscillations, however the bass response is normal, otherwise I think there is a problem in the feedback loop of your amplifier
Long time from first post #1990 to a stereo module (only fotos AX-11)
I wish I had more time.
regards Olaf
Made in Germany
Long time from first post #1990 to a stereo module (only fotos AX-11)
I wish I had more time.
regards Olaf
PSU will be made next year
Regards
PSU will be made next year
Regards
No!!!
Next year first i have to buildt a speaker protection unit!
May be in 2015...
Regards Olaf
No!!!
Next year first i have to buildt a speaker protection unit!
May be in 2015...
Regards Olaf
Perfection need time
Hi apex,
I have made nx14 using IRFP460 . sound is very good and clean. Thanks for providing such nice a circuit
Nice, can you post pictures?
Sorry it was only a test setup with unregulated power supply so I disassemble the circuit
. But i will definitely post pictures when i complete my amplifier.Apex, can i parallel 5 pairs of FETs to get 500w on 4ohm load using NX14 circuit ? then what should be DC supply voltage ?
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Mr Mile
Is it best to use 2x24Vac transformer or is a 2x18Vac transformer OK regarding this preamp regulator circuit
Thanks
AX20
Hi mr Mile ! I took so long but here I am like a snail walking... with my first AX20 channel and NE555 protection, clip led, signal led and power led, in same pcb. Everything is working perfect, power supply +55VDC – 55VDC, DC ofset – 2,5mv. I changed C9 and C10 to 33pF to avoid visible oscilations, I replaced R16 to 1K5 to get enougf bias, 15mv across R33/5W. Is it normal to get 3,54V across colector/emiter of BD139? This amplifier sounds veeeeeeery good, sine wave is perfect, but when I use dummy 8R square wave, you can see the diference betwen with 1uF in paralel or without, is this normal ? In scope, you see 1KHz and 5V per div. I dont have over shooting obssesion anyway ... Output sine Wave 1KHz without clip: 8R 32VAC, 128W, 4R 30VAC, 225W. About supply for NE555 (12VAC) protection, what should I do ? Should I put a smal transformer for it, or get 12VAC from a special winding to the main transformer that I have to order. Thanks a lot Mile !!!!!!!!
Pozdrav
Hi mr Mile ! I took so long but here I am like a snail walking
... with my first AX20 channel and NE555 protection, clip led, signal led and power led, in same pcb. Everything is working perfect, power supply +55VDC – 55VDC, DC ofset – 2,5mv. I changed C9 and C10 to 33pF to avoid visible oscilations, I replaced R16 to 1K5 to get enougf bias, 15mv across R33/5W. Is it normal to get 3,54V across colector/emiter of BD139? This amplifier sounds veeeeeeery good, sine wave is perfect, but when I use dummy 8R square wave, you can see the diference betwen with 1uF in paralel or without, is this normal ? In scope, you see 1KHz and 5V per div. I dont have over shooting obssesion anyway ... Output sine Wave 1KHz without clip: 8R 32VAC, 128W, 4R 30VAC, 225W. About supply for NE555 (12VAC) protection, what should I do ? Should I put a smal transformer for it, or get 12VAC from a special winding to the main transformer that I have to order. Thanks a lot Mile !!!!!!!! Pozdrav
Attachments
Hi mr Mile ! I took so long but here I am like a snail walking
Pozdrav
Nice work... 12VAC supply for NE555 you can get from special winding to the main transformer.
Regards