F5 power amplifier - Page 610

maxlorenz · 25th November 2009, 05:36 PM

Hi Bobo,

In Chile everything is fine, Dollar is down so I can keep coming those big carton boxes full of the necessary to build the J2 and the Selectronic Triphon amplifier modules and compare them using the same supply which will use ECdesigns-s Charge Transfer supply and The Powerreg regulator from Teddy Pardo.
I plan to test Altmann-s SPLIF amplifier topology on the Triphon.

Appart that, we are preparing for presidential elections on December, which I hope will go without troubles...and the winter refuses to leave us...

Au revoir,
M

bobodioulasso · 05:56 PM

Quote:

Michel le Bobo,

in case of the F5, at which side of the output devices is the bias referenced to ?
Secondly, what would the feedback do at the source of the JFETs if there was +/- 10Vdc at the output ?

I got it;
when one rail is open, the feedback resistor of the opposite half forces the corresponding Jfet to open , then there is no more bias on the facing mosfet.
Thanks Jacco, i missed this aspect.

jacco vermeulen · 25th November 2009, 06:00 PM

And the feedback on the same side ?

bobodioulasso · 25th November 2009, 06:53 PM

On the same side?
Produces the opposite, ...but the rail is open on this side so...?

bobodioulasso · 25th November 2009, 10:06 PM

No current from the open rail side is flowing through the load .
Neither any current from the opposite half (as stated upper)
So the load sees no current at all.
I do not really understand your question, Jacco.
Or am i wrong somewhere?

bobodioulasso · 25th November 2009, 10:11 PM

Quote:

and the winter refuses to leave us...

Lucky people, here we are going into winter!

jacco vermeulen · 25th November 2009, 10:21 PM

Quote:

Originally Posted by bobodioulasso

forces the corresponding Jfet to open

Open or Close ?

bobodioulasso · 25th November 2009, 10:58 PM

Open as an open circuit.

tinitus · 01:27 AM

bobodioulasso · 26th November 2009, 09:12 AM

As stated manytimes upper:
Jfets prefer to be thermal coupled ( close to eachother)
It should be wise to count with cascoding in your lay out. Easy to strap if you do not use.
(10% mains variations could bring the rails to 33 volts which is the very limit.)

25th November 2009, 05:36 PM	#6091
maxlorenz diyAudio Member Join Date: Oct 2003 Location: osorno , Chile	Hi Bobo, In Chile everything is fine, Dollar is down so I can keep coming those big carton boxes full of the necessary to build the J2 and the Selectronic Triphon amplifier modules and compare them using the same supply which will use ECdesigns-s Charge Transfer supply and The Powerreg regulator from Teddy Pardo. I plan to test Altmann-s SPLIF amplifier topology on the Triphon. Appart that, we are preparing for presidential elections on December, which I hope will go without troubles...and the winter refuses to leave us... Au revoir, M __________________ Cheapest horn speakers: https://picasaweb.google.com/lh/phot...eat=directlink

25th November 2009, 06:00 PM	#6093
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	And the feedback on the same side ? __________________ Looks like Sponge Bob has killed another thread.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Rockford Fosgate Power 20001 bd amplifier power rating??	pachoorion	Car Audio	8	8th May 2011 11:49 PM
Power transformers versus amplifier output power..what is your option?	destroyer X	Solid State	38	9th May 2009 06:23 PM
McIntosh Power Amplifier Power Guard	johnnyrt	Solid State	2	23rd August 2007 11:22 PM
Output power for a power amplifier	Progg70	Solid State	33	10th September 2006 09:44 AM
Amplifier 3000 Wats Rms Power + Smps Higcht Power Bestiality	MARAVILLASAUDIO	Class D	1	5th November 2004 05:06 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

25th November 2009, 06:53 PM	#6094
bobodioulasso diyAudio Member Join Date: May 2008 Location: On the moon.	On the same side? Produces the opposite, ...but the rail is open on this side so...?

25th November 2009, 10:06 PM	#6095
bobodioulasso diyAudio Member Join Date: May 2008 Location: On the moon.	No current from the open rail side is flowing through the load . Neither any current from the opposite half (as stated upper) So the load sees no current at all. I do not really understand your question, Jacco. Or am i wrong somewhere?

25th November 2009, 10:58 PM	#6098
bobodioulasso diyAudio Member Join Date: May 2008 Location: On the moon.	Open as an open circuit.

26th November 2009, 09:12 AM	#6100
bobodioulasso diyAudio Member Join Date: May 2008 Location: On the moon.	As stated manytimes upper: Jfets prefer to be thermal coupled ( close to eachother) It should be wise to count with cascoding in your lay out. Easy to strap if you do not use. (10% mains variations could bring the rails to 33 volts which is the very limit.)

Currently Active Users Viewing This Thread: 2 (1 members and 1 guests)
Jack C.