Jean Hiraga ( Super - 30 ) Class A - New Enclosure, A Bulky Bank and little modified PCB
- Thread starter sadik
- Start date
They are cutted on laser cnc machine.
Sure Bro... Just confirm me the dates.
Sure Sir, Just confirm me the dates. The outputs are NJW0281 & NJW0302 one of the beset sounding Transistors.
Sure Brothers & Friends You all are welcomed for audition of this amplifier.
I thank you all my friends for the appreciation & nice comments received from you all. This is what keeps the DIY spirit alive within me. Thank you all Again.
Sadik
M
mpw
Guest
Looks excellent..
Would love tobhe
Sadik
Please PM me your address in Baroda
I visit baroda sometimes on work
thanks
mpw
Would love tobhe
Sadik
Please PM me your address in Baroda
I visit baroda sometimes on work
thanks
mpw
Thanks a lot.
Do you have to match the transistors? If so, multiple pairs should be purchased to get a good match.
Last edited by a moderator:
Not necessary to match. But if you match them it will be benificial.
Professori
Member
Sorry I have been missing the action here for some time...
Very happy to see the fantastic conclusion!
Congrats on the successful and unique build, Sadik-ji! Hope you're climbing the steps slowly to Seventh Heaven...Audio Nirvana!!
What about making your PCB available? Of course, I am interested. Do send mail when free.
Warm regards,
--UKP
Very happy to see the fantastic conclusion!
Congrats on the successful and unique build, Sadik-ji! Hope you're climbing the steps slowly to Seventh Heaven...Audio Nirvana!!
What about making your PCB available? Of course, I am interested. Do send mail when free.
Warm regards,
--UKP
Wow..what a lovely build. Absolutely gorgeous Mr.sadik. You are a designer and master crafter par excellence. Salutations
Okay...iam off to get a towel to wipe my drool off my shirt now
Thank You @newlash09
The wheel of update should keep on running, so here is some update on my another Jean Hiraga 30 Watt Class A amplifier. This amplifier has a PCB from Jims Audio with Kubuta regulator. Below is the photo of same.
The Heat Sink is 350 mm Height, and 300 mm weight, A massive 10 Kg each x 2 Nos for left and right.
The Power Bank.
Each Capacitor is 1,50,000 uf / 50 volts x 8 Nos a total of 12,00,000 uf (twelve lac micro farad) capacitance with a massive 800 VA transformer ( 25-0-25 AC / 800 VA). The top copper plates (+ve rail, -ve rail and ground) are 5 mm thick which are also cutted on water jet. I am following a star ground in this power supply. Below is the layout how i arranged the power supply. (The total weight of this Power Supply along with R Core transformer is approx 20 Kg)
The Enclosure is made from Aluminum, The side walls left and right are the heat-sink itself and rest 4 sides Top, Bottom, Front and Back are 4 mm thick aluminum sheets cutted on CNC laser cutting machine.
This time i went with an unique look for my enclosure, i selected wood finish on Aluminum. just have a look below, its 4 mm thick aluminum plate.
And the final look, The connectors are yet to be mounted (I will upload another photos after mounting & wiring the connectors)
The modules are tested and amp is dead silent. The sound of this amplifier do not need any description / introduction, the Jean Hiraga owners know the tonal signature of this amp. And that is the only reason, I am making this amp for the 3rd time. Each time I have upgraded the Power Supply Bank. The bulky bank helps in getting the exact low end notes with much intensity (one can call tight & punchy low end) which i was missing with my earlier power supply bank as well as capacitance multiplier (I have used cap multiplier in my first built). The Capacitance multiplier and low capacitance bank works good only in mid and highs region, It dose not gives the refined tone for the Bass (the bass is loose), When compared the Bass of actual capacitance bank with cap multiplier or low capacitance bank, one can easily make out the difference in tightness / tonal character of Bass. The bass with such a huge capacitance bank is really on another level.
Right now the initial bias is 1.2 Amp, and i think after a stable temperature this should be around 1.5 to 1.6 amp. Too much of heat and the heatsinks are already an overkill to take care of this temperature. I will update the readings of temperature as well as bias current after few days of monitoring my amplifier.
The Heat Sink is 350 mm Height, and 300 mm weight, A massive 10 Kg each x 2 Nos for left and right.
The Power Bank.
Each Capacitor is 1,50,000 uf / 50 volts x 8 Nos a total of 12,00,000 uf (twelve lac micro farad) capacitance with a massive 800 VA transformer ( 25-0-25 AC / 800 VA). The top copper plates (+ve rail, -ve rail and ground) are 5 mm thick which are also cutted on water jet. I am following a star ground in this power supply. Below is the layout how i arranged the power supply. (The total weight of this Power Supply along with R Core transformer is approx 20 Kg)
The Enclosure is made from Aluminum, The side walls left and right are the heat-sink itself and rest 4 sides Top, Bottom, Front and Back are 4 mm thick aluminum sheets cutted on CNC laser cutting machine.
This time i went with an unique look for my enclosure, i selected wood finish on Aluminum. just have a look below, its 4 mm thick aluminum plate.
And the final look, The connectors are yet to be mounted (I will upload another photos after mounting & wiring the connectors)
The modules are tested and amp is dead silent. The sound of this amplifier do not need any description / introduction, the Jean Hiraga owners know the tonal signature of this amp. And that is the only reason, I am making this amp for the 3rd time. Each time I have upgraded the Power Supply Bank. The bulky bank helps in getting the exact low end notes with much intensity (one can call tight & punchy low end) which i was missing with my earlier power supply bank as well as capacitance multiplier (I have used cap multiplier in my first built). The Capacitance multiplier and low capacitance bank works good only in mid and highs region, It dose not gives the refined tone for the Bass (the bass is loose), When compared the Bass of actual capacitance bank with cap multiplier or low capacitance bank, one can easily make out the difference in tightness / tonal character of Bass. The bass with such a huge capacitance bank is really on another level.
Right now the initial bias is 1.2 Amp, and i think after a stable temperature this should be around 1.5 to 1.6 amp. Too much of heat and the heatsinks are already an overkill to take care of this temperature. I will update the readings of temperature as well as bias current after few days of monitoring my amplifier.
amrutmhatre90
Well-Known Member
This thing is a tank!!!
Superb job, I used to read this thread but without pictures. Love the wooden aesthetics on this, may I know why not some people use real wood ? any issues? cause I had seen some amps with only heat sinks and back plate as metal parts on the chassis.
Would love to know the temperatures this goes to.
Impressive work, too good.
Superb job, I used to read this thread but without pictures. Love the wooden aesthetics on this, may I know why not some people use real wood ? any issues? cause I had seen some amps with only heat sinks and back plate as metal parts on the chassis.
Would love to know the temperatures this goes to.
Impressive work, too good.
surfatwork
Well-Known Member
Best to tell them to upgrade the electricity transformer near your house.
keith_correa
Well-Known Member
Powder coating? I think the process is called sublimation.
No need in present atmospheric conditions, and i think the heat sinks i have used are still an overkill
lol
This 30 watt Amp can easily outperform 150 to 180 watt class AB amplifier. Even a 20 Watt class A amplifier will outperform 120 watt class AB amplifier.
Thankyou @Hiten This process is somewhat like powder coating.
Thanks @raghupb Its a process somewhat similar to powder coating.
No its not sublimation. As i said above its similar to powder coating.
Su
Superb sadik bhai, extremely well looking, extremely well designed
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