Skynyrd77's Thank Godamighty , Finally My Own WOPL Build Thread!!

[laatsch55]

And into 8 ohms, they both clipped around 505 again...

 

[CASSETTE DECK]

When the circuit is in play what does the scope trace look like?

Clipping, causing it to look more like a square wave than a sine wave.

 

[laatsch55]

I guess we would call that empirical evidence the protection circuit is not involved with the act of clipping....

Current starvation??

 

[laatsch55]

Clipping, causing it to look more like a square wave than a sine wave.

Yep familiar with that look. Was thinking the clamp action might cause a very hairy looking wave...

 

[laatsch55]

You're being awfully quiet Dennis.....

 

[Gepetto]

I guess we would call that empirical evidence the protection circuit is not involved with the act of clipping....

Current starvation??

How about a math error. Did you tell your AP that it was a 4 ohm load you were driving?? I have to tell my HP what I am driving.


You posted earlier that it was 55V into 4 ohms at 14A = 770W

You posted earlier that it was 63V into 8 ohms at 8A = 504W

 

[laatsch55]

AHHH.....Jeez.... hang on....

 

[Gepetto]

Both clipped at 387 into 4...

Times 2 (for the 4 ohm factor) = 774W

 

[laatsch55]

yes, it is measuring power onto 8 ohms. Haven't figured out how to change it yet. So the 378 at 4 ohms was really 750 plus....

 

[Gepetto]

Times 2 (for the 4 ohm factor) = 774W

Lee
You indicated earlier that the PS voltage was sagging to 79V when you were wailing on it at 4 ohms. Well your 55V RMS is 77.7V peak which is all she's got.

"Captain, I think you are going to need a bigger boat..."

 

[laatsch55]

Times 2 (for the 4 ohm factor) = 774W

Thank you Joe.....once again. that volt/amp figure should have jumped out at me....hmmmmm.....

 

[Skynyrd77]

yes, it is measuring power onto 8 ohms. Haven't figured out how to change it yet. So the 378 at 4 ohms was really 750 plus....

Damn!!

 

[Gepetto]

yes, it is measuring power onto 8 ohms. Haven't figured out how to change it yet. So the 378 at 4 ohms was really 750 plus....

Mine is a command line setting on the HP, it is buried in your AP documentation somewhere. Your 387 reading is really 774W into 4.

 

[laatsch55]

Lee
You indicated earlier that the PS voltage was sagging to 79V when you were wailing on it at 4 ohms. Well your 55V RMS is 77.7V peak which is all she's got.

"Captain, I think you are going to need a bigger boat..."

LMOAO!!!!!

 

[Gepetto]

Good night Lee...

 

[Skynyrd77]

Thanks joe! It has been fun for me!

Man that sounds bad don't it!

 

[laatsch55]

Controlling PS voltage sag would go a long ways in the watts out department, while also running up against SOA... just don't get something for nothing...jeez....physics works....

 

[laatsch55]

Good night Lee...

Thanks for stayin up with us Joe...nite..

 

[laatsch55]

You're still awfully quiet Dennis....

 

[Northwinds]

LMOAO!!!!!

Yep, Joe made my sigline again with that one