Hiraga "le monstre"

[woody]

Are there any boards available other than from pc-design. I would
rather not deal with them and there prices seem a little high.
Isn't this one amp where we could use those huge car boomer
caps?

[Lumba Ogir]

lineup,

Right now my spirit is gone.

was I destructively just? Would polite agreeing constructively promote your creative thinking?
The right way to go is improving the linearity of the stages, not increasing the open-loop gain and GNF.
Hiraga has showed that stability can be maintained without a single dirty part. It`s an extremely clean design.

Would this work?

[Lumba Ogir]

I am sorry...

[Lumba Ogir]

Sigurd,
2SC3953/2SA1538 can be used at higher currents as well.

Some complementary types in power TO-92

2SC2632/2SA1124
2SC2705/2SA1145
2SC2910/2SA1208
2SC3467/2SA1370
2SC3468/2SA1371

[audiomanics]

My PCB layout. Single sided, short powerlines, thermal coupled transistors, Faston connectors.
Comments please.

Kees

[danieljw]

Hello All,

If you wanted to see the completed Le monstre build i did, it is here:
http://diyaudioprojects.com/Solid/Je...ga-Le-Monstre/


Lumba, the use of tl 431 is insteresting.... i cannot comment on how it would work in this circuit perhaps give it a try ?

Lineup, it would be a shame to see your diy spirit disappear you have contributed alot!!!

Audiomanics, that layout is great !!!!!

If you are interested in the other hiraga amp find it here.

it is completed and i have listened to it.

Hiraga 20W class A

-Dan

[neazoi]

Could I use 5% Carbon composite resistors with the original design, for lower inductance or they will be more noisy and affect the circuit?
I have read that solid state devices and carbon compisite resistors go very well together...?

[neazoi]

Also the authos suggests
2sc1775 (E)
2sk170 (Y)
2sj74 (Y)
2sa782 (E)

to be used.
I have obtained the transistors without the letters (E/Y) at the end. I am not sure about what these letters mean so I would like to ask if could I use the ones I have got in the amplifier

[audiomanics]

For the Fet's (2SK170 and 2SJ74):
These are grouped for their Idss: Without: 2,6-20mA
GR = 2,6 - 6,5 mA BL=6,0-12mA and V=10-20mA
Y is probably the same as V
For the normal transistors (2SC1775 and 2SA782):
These are grouped for their hfe: no ext.: 400-1200
E = 400-800 and F= 600-1200

As you have to match the transistors you have to measure the parameters of each transistor individual anyway..

For the fets you can change the resistance of the trimmer to get the correct bias and the current through the endstage.
It has been described somewhere in this tread before..

Kees

[neazoi]

I suppose the matching should be done between same transistors in both channels (for channel matching) and not in the different transistors in one channel because they are different types, right?

What about carbon composite resistors?