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 will definately let you guys know how it goes.
recently got the tantalum resistors 🙂 so planning on seeing how they go 🙂
-Dan
danieljw said:
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
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
diyhifisupply on ebay has tants if you are interested. the price is still pretty high though.
-Dan
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
Thoughts?
Cheers
Nigel
PCBsneeded
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
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
Re: PCBsneeded
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.
Hi,neazoi said:
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.
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
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
Hi Guys,
I just saw a method which is really easy and quick and inexpensive to make a pcb,
http://www.instructables.com/id/Sponge-Ferric-Chloride-Method-Etch-Circuit-Bo/
here is the link.
It seems so simple and that its silly.. but it looks like it will work well
-Dan
I just saw a method which is really easy and quick and inexpensive to make a pcb,
http://www.instructables.com/id/Sponge-Ferric-Chloride-Method-Etch-Circuit-Bo/
here is the link.
It seems so simple and that its silly.. but it looks like it will work well
-Dan
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
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
Last edited:
I have built some hiraga monsters
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.
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.
then what is promising for this Tr.
2sc2341 /1358 is relatively easy to choice for 2sc5200(toshiba) , 2sc2922 (sanken) .
2sc2341 /1358 is relatively easy to choice for 2sc5200(toshiba) , 2sc2922 (sanken) .
Hi All
We seem to drifted way from what I am trying to find out
the Transistors I have listed here are the originals for the 8watt hirage the equivalents listed are the ones I can still get hold of but I just want to confirm if there are the correct replacements for the originals
colin.hepburn2,
2SK170BL/2SJ74BL instead of GR is no problem, I would definitely try the 2SK246/2SJ103.
2SC1775/ 2SA872 "A" only indicates a higher voltage rating.
The 2SD667/2SB647 and the 2SC2342/2SA1358 are not suitable (intended for current amplification), 2SC2632/2SA1124 is OK.
2SK170BL/2SJ74BL instead of GR is no problem, I would definitely try the 2SK246/2SJ103.
2SC1775/ 2SA872 "A" only indicates a higher voltage rating.
The 2SD667/2SB647 and the 2SC2342/2SA1358 are not suitable (intended for current amplification), 2SC2632/2SA1124 is OK.
Interesting that in the simulator it does not behave fine
And several folks say it sounds nice.
This confirms, once more, that simulator results does not match listening tests...or, as another option, people is biased and do not even compare to know if it really beat others or not.
I have build several years ago and i dislike it a lot... sounded not fine, despite i like some JLH models that operates in class A too.
Now, reading thread, i have simulated all options, and found them not fine, into fourier many behave bad, distortion levels (THD) is higher than normal, simple, standard and common cheap AB amplifiers.
I have now tested the last circuit published, and i could not see (numbers) good results.
The best one (into simulator) was the one operates with 35 volts
regards,
Carlos
And several folks say it sounds nice.
This confirms, once more, that simulator results does not match listening tests...or, as another option, people is biased and do not even compare to know if it really beat others or not.
I have build several years ago and i dislike it a lot... sounded not fine, despite i like some JLH models that operates in class A too.
Now, reading thread, i have simulated all options, and found them not fine, into fourier many behave bad, distortion levels (THD) is higher than normal, simple, standard and common cheap AB amplifiers.
I have now tested the last circuit published, and i could not see (numbers) good results.
The best one (into simulator) was the one operates with 35 volts
regards,
Carlos
Attachments
Charlie,
After having built 4000 amplifiers, maybe its time for drawing conclusions. Your eyes can see now that gleam of light far away, taking you closer to the moment of salvation: it would have been better to build just one, a good sounding one with terrible measurements.
OK so the following transistors are good for 8 watt hiraga yes
2SK246/2SJ103
2SC1775/ 2SA872
2SC2632/2SA1124
Which output Trans are recommended in place of the original 2SD844 /2SB754
Found this pair 2SD718/2SB688 120V 8A 80W HI-FI compliment to 2SD718 would these be ok as the output Trans
Is it genuine Toshiba
Hadn’t though of that no it’s not but dose it really matter see data sheet
http://www.datasheetcatalog.com/datasheets_pdf/2/S/D/7/2SD718.shtml