My class D amp

[aman khalsa]

Ok thank u sir.. with IRFP 260 can I drive 4 ohm 600w lord on +- 120v.

 

[norazmi]

+- 120 vdc is more than 600w at 4 ohm load.

 

[manojtm]

Hi Aman,

+/-120V you will get True RMS 1800W@4R load and use Speaker 4R/3600W for full drive
+/-71V you will get True RMS 600W@4R load

Regards
MANOJ

 

[aman khalsa]

Thank u sir.

 

[akraj]

Hi Manoj:

For last few months I was experimenting on your aud600 ver1. Today mistakenly I gave .1uf cap and instantly 2k/2w resistor blown away. Replaced that and removed .1uf with 1uf cap.

But there is no audio even no grid. Replaced all ICs but no response. All relative voltage is okay, relay connects, no overload nothing unusual. Still no response.

How and what I can check? I don have oscilloscope. Please suggest.

Thanks
Raj

 

[aman khalsa]

Didi u chek 12vdc aux.??

 

[akraj]

Yes, I checked. All relative voltage are okay.

 

[manojtm]

Hi Raj,

May be your relay blown.check your relay contacts

Regards
MANOJ

 

[manojtm]

Hi Raj,

May be your relay blown.check your relay contacts

Regards
MANOJ

 

[manojtm]

Hi Raj,

For making Class D amp you need a DSO, without oscilloscope you cannot find any problem

Regards
MANOJ

 

[aman khalsa]

Hello sir what is DSO?? Where can I get that??

 

[ravpreet420]

Digital Storage Oscilloscope
for measure freaquency

 

[Tekko]

As far as oscilloscopes go, the Rigol DS2000 series gives the most bang for the buck, but if you do not have 800 dollars to spend and absolutely cannot wait until you do, the next best option is the Rigol DS1052 for just a mere 400 dollars.

 

[akraj]

Thanks Manoj, but relay is okay.

 

[aman khalsa]

Hi Manoj:

For last few months I was experimenting on your aud600 ver1. Today mistakenly I gave .1uf cap and instantly 2k/2w resistor blown away. Replaced that and removed .1uf with 1uf cap.

But there is no audio even no grid. Replaced all ICs but no response. All relative voltage is okay, relay connects, no overload nothing unusual. Still no response.

How and what I can check? I don have oscilloscope. Please suggest.

Thanks
Raj

Hello sir. Can u shere ur experiments with us ..?

Thank u

 

[akraj]

What you want to know?

 

[akraj]

Hi Manoj:

If I can arragne DSO, where and what to measure? Test points and idle value/shape/voltage etc.

Thanks
Raj

 

[manojtm]

Hi Raj,

1. Remove 1nF capacitor connected to GND near 1N4148 x2(pin-2 of IC TL071) and use 33uH coil and add 1K resistor paralell with 1K 1% (frq. adjust)
2. Connect 1KHz signal if you have or any audio signal with min. volume
3. Check Pin-5 of IR2110 with DSO with respect to GND(it will show @400KHz square signal)

Regards
MANOJ

 

[akraj]

Hi Raj,

1. Remove 1nF capacitor connected to GND near 1N4148 x2(pin-2 of IC TL071) and use 33uH coil and add 1K resistor paralell with 1K 1% (frq. adjust)
2. Connect 1KHz signal if you have or any audio signal with min. volume
3. Check Pin-5 of IR2110 with DSO with respect to GND(it will show @400KHz square signal)

Regards
MANOJ

Thanks Manoj, I will try to manage a DSO.

Can i short with jumper if I don have 33uH?

Thanks
Raj

 

[manojtm]

Can i short with jumper if I don have 33uH?

Hi Raj,

Don't short coil.

Regards
MANOJ