modern incarnations of Hiraga Le Monstre

steph_tsf · 09:52 AM

hello,

what are the modern incarnations of Jean Hiraga "Le Monstre" published in L'Audiophile n°27 (ancienne série) in Feb. 1983 ?

steph_tsf · 19th August 2011, 11:11 AM

J.M. Plantefève "Zenotron"

steph_tsf · 19th August 2011, 11:23 AM

Nelson Pass "F5"

wahab · 19th August 2011, 11:33 AM

Quote:

Originally Posted by steph_tsf

Nelson Pass "F5"

That is a copy of Selectronics Profet...

frederic75 · 19th August 2011, 11:42 AM

Or a copy of Nelson's amp

Géo

homemodder · 19th August 2011, 12:53 PM

Quote:

Originally Posted by frederic75

Or a copy of Nelson's amp

Géo

The profet was published quite a few years before the F5

Besides they are not the same, look at the feedback paths.

steph_tsf · 01:56 PM

Or maybe Selectronic licensed the J.M. Plantefève "Zenotron" schematic and industrialized a deluxe version with a R-Core transformer and 8 x 10,000µF in the power supply. Jean Hiraga himself reviewed the Selectronic ProFet.
Wait a moment. This is a mono amplifier. I count 4 MOSFETS in total. It is a bridged tied load "Zenotron" incarnation with a floating power supply.

steph_tsf · 19th August 2011, 01:39 PM

I'm looking to other schematics like "Zenquito" or "Buzquito" (or Mosquito). They feature a symmetric voltage amplification stage between the FET input stage and the power MOSFETS. Because of the additional phase inversion, the MOSFETS are now source followers. Shall we say these are modern incarnations of Hiraga "Le Monstre" ? If not, what is their generic name ?

kenpeter · 22nd August 2011, 10:55 AM

I like R21 + R22 in the F5 schematic! Soft voltage
limits by way of soft current limits. 3 fewer parts
for this function than mine, and might work better.

I was using 4 Zeners and a resistor in feedback.
Voltage knee a little sharper than current knee.
and capacitance of the Zener stack is variable.

I'll give Nelson's way a try, see what happens.

Tazzz · 24th August 2011, 08:24 PM

Here is something I recently started to play with based on the old le monstre.

I'ts in no way optimized but it is a start.

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
Hiraga "Le Monstre" for headphones.	owenhamburg	Headphone Systems	6	11th April 2013 07:04 PM
Hiraga Le Monstre Transistors GB	gaborbela	Group Buys	4	8th June 2011 06:57 PM
hiraga Le monstre	moochinazz	Car Audio	4	18th April 2011 07:51 AM
Hiraga 30W vs. Le Monstre	JohanH	Solid State	103	14th April 2008 10:27 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

19th August 2011, 11:42 AM	#5
frederic75 diyAudio Member Join Date: Apr 2006 Location: PARIS	Or a copy of Nelson's amp Géo

19th August 2011, 01:39 PM	#8
steph_tsf diyAudio Member Join Date: Mar 2008	I'm looking to other schematics like "Zenquito" or "Buzquito" (or Mosquito). They feature a symmetric voltage amplification stage between the FET input stage and the power MOSFETS. Because of the additional phase inversion, the MOSFETS are now source followers. Shall we say these are modern incarnations of Hiraga "Le Monstre" ? If not, what is their generic name ?

22nd August 2011, 10:55 AM	#9
kenpeter diyAudio Member Join Date: Nov 2007 Location: Dallas	I like R21 + R22 in the F5 schematic! Soft voltage limits by way of soft current limits. 3 fewer parts for this function than mine, and might work better. I was using 4 Zeners and a resistor in feedback. Voltage knee a little sharper than current knee. and capacitance of the Zener stack is variable. I'll give Nelson's way a try, see what happens.