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Old 11th October 2005, 12:37 PM   #1
roger-k is offline roger-k  Norway
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Default Poweramp with 2SK1058 and 2SJ162?

I had a plan: It was to make the P101 from Elliott Sound Products, form scratch. I have bought the transistors but now I see there is no values in the schematics. It is no problem for me to buy the PCB's but I want to make all by myself form scratch.
You know self-made is well done.

So here is the question:
Any who have a good poweramp schematic with the 2SK1058 and the 2SJ162?
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Old 11th October 2005, 12:58 PM   #2
tlf9999 is offline tlf9999  United States
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you can pretty much design the P101 by yourself. it is not that difficult. You can even simplify it a little.

That way, you get to use your transistors.
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Old 11th October 2005, 01:07 PM   #3
edl is offline edl  Hungary
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Dear Roger!

These mosfet's are excellent, I like them very much. They are little bit expensive (5 Euro - 6 USD here), but they are worth the money.
They are equivalents of the 2SK135/2SJ50 (the production of these devices is discontinued, only NOS issues avaliable, for price like gold), but in an other casing, plastic TOP-3 instead the metal TO-3.
The difference between 2SK135/2SJ50 and 2SK1058/2SJ162 is only mechanically, they are absolutely same inside.

So let's search for schematics with 2SK135/2SJ50, you will find a lot of them (for example "Crescendo" amplifiers).

Good luck, all the best,

PS.: schema of original Crescendo amp, 8ohm/75W version. If you would like to push the amp an 6 or 4ohm impedance speakers, you will need to use the newer schema version (do a search on the solid state forum with 'crescendo" word.)
http://www.audiofanatic.it/Schemi/Ti...K135_2SJ50.jpg
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Old 11th October 2005, 01:20 PM   #4
joensd is offline joensd  Germany
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Quote:
It was to make the P101 from Elliott Sound Products, form scratch.
Quote:
I see there is no values in the schematics.
You mean you want to etch the PCB yourself?

If you dont mind spending a couple bucks on a book:
Randy Slone has got plenty of amplifiers in his book "high-power audio amplifier construction manual" that incorporate 2SK1058/2SJ162 devices.
Hes got another book that contains schematic for his "famous" optimos-amplifier.
Seal Electronics used to have the schematic up on their website but now its gone. (now guess who still got it on his HD? )
Then again Id guess if you see the schematic of the optimos youll immediately go and buy Rods PCBs as designing a PCB for the optimos is far from being a beginners project.

Anyway Randys amps are quite interesting.
You might even find some/similar here in the forums.

greets
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Old 11th October 2005, 04:53 PM   #5
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Default Re: Poweramp with 2SK1058 and 2SJ162?

Quote:
Originally posted by roger-k
I had a plan: It was to make the P101 from Elliott Sound Products, form scratch. I have bought the transistors but now I see there is no values in the schematics. It is no problem for me to buy the PCB's but I want to make all by myself form scratch.
You know self-made is well done.

So here is the question:
Any who have a good poweramp schematic with the 2SK1058 and the 2SJ162?

Hi Roger,

I built the P101 as my first DIY project. It is still one of my favorite amps.

I don't know how Rod feels about this, but i believe that if you buy any of his PCB's he will give you access to the construction pages which have all of the BOM's for all his designs. You might want to just buy one of the inexpensive ones, just for the access.

Blessings, Terry
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Old 12th October 2005, 03:37 PM   #6
AndrewT is offline AndrewT  Scotland
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Hi Still4given,
you have no scrupples.
ESP provide a lot of support for the DIY community and this would remove some of his potential income.
Go the whole hog and just give us the code!!!!
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Old 12th October 2005, 04:11 PM   #7
sam9 is offline sam9  United States
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Per Rod, the actual physical PCB layout influences the performance of his design. I can't verify that is the case, but the boards ARE very compact and have the benefit that they mount flat against the heatsink thus taking uop very little space in the enclosure.

Why not buy a pair of boards (they are very inexpensive) then build and study how they work. Then if you want a challenge, try building the same circuit and layout the PCB using a single pair of dual-die MOSFETS for the purpose of making the amp physically smaller still.
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Old 12th October 2005, 04:26 PM   #8
tlf9999 is offline tlf9999  United States
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I would 2nd the view that using the ESP boards is probably easier and helps promote Rod's products. Rod is one of those upstanding guys in this community and unlike some of his competitors, he is more of a doer than a marketer and we should encourage him by voting with our dollars (or whatever currencies you happen to use, ).
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Old 12th October 2005, 04:29 PM   #9
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Quote:
Originally posted by AndrewT
Hi Still4given,
you have no scrupples.
ESP provide a lot of support for the DIY community and this would remove some of his potential income.
Go the whole hog and just give us the code!!!!

Hi Andrew,

Thanks for your support.

If I had no scrupples I might have given the code. I have bought many PCB's from Rod as well as many of the accessories he sells. I was encouraging Roger to make a purchase from Rod. I see guys ask all the time for the component values for Rod's designs. I always encourage them to buy from Rod if they want access to the BOM's. If anything I have tried to champion Rod's cause.

I resent you implication!!!!
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Old 13th October 2005, 11:26 AM   #10
rabbitz is offline rabbitz  Australia
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You should buy the P101 board from Rod as he's given so much to the DIY community. There's quite a few tricks in his layout, and the ESP PCB makes it easy.
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