Hiraga "le monstre"

[danieljw]

nigel makes some good points,

I will definately let you guys know how it goes.

recently got the tantalum resistors so planning on seeing how they go

-Dan

[njepitt]

Originally posted by danieljw
nigel makes some good points,

I will definately let you guys know how it goes.

recently got the tantalum resistors so planning on seeing how they go

-Dan

I'd like to hear about the tantalums, also, although I'm not sure where I could source them without paying a fortune.

Is anyone else out there interested in a "fully modern" version? I'm fascinated by possibilities of using SMD jfets, if there is a complementary pair available, for instance.

Cheers

Nigel

[danieljw]

yeah smd matched fets, precision smd components and rf friendly layout would be interesting to try

diyhifisupply on ebay has tants if you are interested. the price is still pretty high though.

-Dan

[njepitt]

This sounds more and more like an interesting project. Anyone know of a good complementary pair of SMD jfets? In fact, the only things that most likely couldn't be SMD would be the output trannies and the big resistors on their collectors...

Thoughts?

Cheers

Nigel

[neazoi]

Hi I have all the components for le monstre battery powered but I need someone to make the two PCBs for me. I have the transparencies for the PCBs to send him.

Can anyone make these for me?
Or is there any company that can undertake this for just two pieces and exporting to Greece?

Any help will be appreciated
Thanks

[carolus]

Originally posted by neazoi
Hi I have all the components for le monstre battery powered but I need ......

Hi,
Other practical suggestion: built the components in "spider web" ... it's a nice (green) & KIS solution (for an apple and a egg).
Best regards from Brussels.
.... 2x4 monster Octopus user.

[audiomanics]

Hi Neazoi,
I'm back in my home in Holland so i think i can make some PCB's in a few weeks from now.. (my container is still on the way to here and i need to order the material for it)
If you are in a real hurry (which i doubt ;-) ) you should look for another source.
I will make them just the old fashioned way: no printing and no soldermasks but i will use the blue epoxy.
I don't think shipping an envelope to Greece will cost that much...
In total it will be a matter of just a few euro's i guess (PCB's included) I cannot give you the exact amount yet...
(BTW i thought you would make the PCB's yourself??)

Kees

[danieljw]

Hi Guys,

I just saw a method which is really easy and quick and inexpensive to make a pcb,

http://www.instructables.com/id/Spon...ch-Circuit-Bo/

here is the link.

It seems so simple and that its silly.. but it looks like it will work well

-Dan

[colin.hepburn2]

Hi All
OK I'm new to this amp so hope some one can help me I have just got a set of the hiraga LE monster PCBs for the 15 watt version but I will be building the 8 watt version first I know some of the transistors are difficult to get now but I have a list of replacements can anyone confirm if there are correct
2SJ74
PFET TO92 SGD P Channel FET 50V Idss=1.2Ma Suggested Equivalent2SJ103

2SK170BL
NFET TO92 DGS 40V 20mA Idss=1Ma Suggested Equivalent2SK170
2SC1775
NPN TO92 ECB 120V 50mA 200MHz Suggested Equivalent 2SC1775A
2SA872
PNP TO92 ECB 120V 50mA 120MHz Suggested Equivalent 2SA872A
2SB716
PNP TO92 ECB Suggested Equivalent: 2SB647
2SD756

NPN TO92 ECB 150V 50mA 1W 160MHz Suggested Equivalent2SC2632
Output trans
2SB754/2SD844 Equivalent unkown
See parts list and sch for 15 watter

[mindengine]

From my experience of building hiraga monsters.

2sc5200 , 2sa1943 pair worked fine.
driver was 2sc23421 , a1358 pair .

circuit of kk-pcb (http://www.kk-pcb.com/hiraga.html)
aso worked but front fet is quite different .

k246 has larger pinch off voltages. gm is smaller .
(Erno Boberly mentioned k170 , k246 differncies in his article.)

I think k170 /j74 pair is better.