<i>RIC SCHULTZ: “I have found the Aleph output stage does not sound very good compared to a simple current sourced stage. All the feedback around the current source, the out series resistors, all the parts hanging on the output all mess up the sound royally. A simple Mosfet with a fixed current source sounds way better. You do lose the power into 4 ohms and lower but it sounds soooo good.”</i>
I’m glad that I’m not the only one who thinks so! (I know now that the sweet vocal characterizing the Aleph came from the feedback)
<i>NELSON PASS: “If you follow this to its logical conclusion, you end up with
a resistor for a current source, as with SOZ or Zen Lite.”</i>
But I think the sound is different, a lot more bass (or power?) on the “Aleph”.
Kristijan-k, I’m hoping you will soon come up with tube differential stage to replace IRF9610 in the Aleph
I’m glad that I’m not the only one who thinks so! (I know now that the sweet vocal characterizing the Aleph came from the feedback)
<i>NELSON PASS: “If you follow this to its logical conclusion, you end up with
a resistor for a current source, as with SOZ or Zen Lite.”</i>
But I think the sound is different, a lot more bass (or power?) on the “Aleph”.
Kristijan-k, I’m hoping you will soon come up with tube differential stage to replace IRF9610 in the Aleph
Hello Mach_Y,
There already is one PCB for tube section power supply.
Best regards,
Kristijan Kljucaric
http://web.vip.hr/pcb-design.vip
There already is one PCB for tube section power supply.
Best regards,
Kristijan Kljucaric
http://web.vip.hr/pcb-design.vip
Attachments
... and here below is wiring diagram for the Tube Penultimate Zen
amplifier.
Best regards,
Kristijan Kljucaric
http://web.vip.hr/pcb-design.vip
amplifier.
Best regards,
Kristijan Kljucaric
http://web.vip.hr/pcb-design.vip
Attachments
Hello,
Mach_Y,
The transformer was custom made for me by local manufacturer.
The power stage requires around 38 V/300VA, and tube stage requires
170 V/10VA + 9 V/15VA for tube heater.
The power supply voltages are not critical, and If you are not able to find
the transformer/transformers with this
voltages, than feel free to use any that are similar.
The above power ratings are per one channel.
If you would like to use one power supply for the both channels, than
just double the power ratings of the transformers.
The tube power supplies are on the left down corner of the PCB, and
the power stage power supply is on the right up corner of the PCB.
Ashok,
The B9A pcb mounting socket is from Audiokit, Italy.
However, you can find them at a few places over the net.
I don't remember the exact cost of them, but I think that they were
a few euros per socket.
There is not much price difference between goldplated version,
but they are little harder to find.
You can contact the Audiokit by: info@audiokit.it
I also have two mounting sockets that I will not be using.
They are not goldplated.
If you would like them, please provide me your adress,
and I would send them to you.
Best regards,
Kristijan Kljucaric
http://web.vip.hr/pcb-design.vip
Mach_Y,
The transformer was custom made for me by local manufacturer.
The power stage requires around 38 V/300VA, and tube stage requires
170 V/10VA + 9 V/15VA for tube heater.
The power supply voltages are not critical, and If you are not able to find
the transformer/transformers with this
voltages, than feel free to use any that are similar.
The above power ratings are per one channel.
If you would like to use one power supply for the both channels, than
just double the power ratings of the transformers.
The tube power supplies are on the left down corner of the PCB, and
the power stage power supply is on the right up corner of the PCB.
Ashok,
The B9A pcb mounting socket is from Audiokit, Italy.
However, you can find them at a few places over the net.
I don't remember the exact cost of them, but I think that they were
a few euros per socket.
There is not much price difference between goldplated version,
but they are little harder to find.
You can contact the Audiokit by: info@audiokit.it
I also have two mounting sockets that I will not be using.
They are not goldplated.
If you would like them, please provide me your adress,
and I would send them to you.
Best regards,
Kristijan Kljucaric
http://web.vip.hr/pcb-design.vip
Attachments
Due to other priorities my penzenhybrid is still in the half finished state. The pcb is at 90%, the cabinet needs some work and I still need some connectors and electronical parts.
Last night while going through some spare parts I found this small block transformator which could be ideal for the 9v powersupply. One thing lead to another and I started thinking that I could use 1 psu for 2 amps in a seperate cabinate which I could use as a "remote" turn on console.
This leaves 1 question, ground loops... should I be worried when going for such a setup?
Last night while going through some spare parts I found this small block transformator which could be ideal for the 9v powersupply. One thing lead to another and I started thinking that I could use 1 psu for 2 amps in a seperate cabinate which I could use as a "remote" turn on console.
This leaves 1 question, ground loops... should I be worried when going for such a setup?
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