Yet another LM project (lme49810 + par CFP)

[konradas]

Hi ,I just build my lme49810 project.And after measuring power looks I am mess up.Power is Ok in 40Hz and 100Hz,but only about 100W in 500Hz and up.Any ideas were to look for my mistakes?Thank you.

 

[palstanturhin]

Power is OK at low frequencies?
But at medium and high frequencies the output power decreases?

Interesting...

What schematic did you use?

 

[konradas]

Thank you for respond.I am using this schematic.
https://drive.google.com/file/d/0B7kpRLNAmK8rdnBuSWF6VFBpcjQ/edit?usp=sharing
If you can't open this link let me know.
Actually I found in my board wrong capacitor C13,by pin#6 of lme49810.Should be 10pF,but I put 10nF.I didn't have time to put right one and check it.This weekend I will have time to show you my wave forms input and output with different frequency.

 

[palstanturhin]

Actually I found in my board wrong capacitor C13,by pin#6 of lme49810.Should be 10pF,but I put 10nF.

That most certainly is the problem.

 

[palstanturhin]

I scoped it. Not a thing . From 10hz to 100khz and the signal voltage was around 1-5 vrms. No output. Also tested the mute pin with an adj psu no change.

Zolux. Any progress?
Are you sure you have the C/E connected the right way on your output transistors?
If not that, I can not think anything else than a short on your PCB somewhere...

 

[AndrewT]

Opened.
Can't read it.

Attach your pic.

 

[konradas]

This is picture of my diagram