I have an Akido all in one built into a small chassis and thinking of putting it in a larger chassis with more inputs/outputs and add a choke (J7 specificied in the manual).
Was hoping to get some help choosing the right choke for the preamp.
I set the preamp up to use 4x 12au7.
I attached pictures from the manual below.
Was hoping to get some help choosing the right choke for the preamp.
I set the preamp up to use 4x 12au7.
I attached pictures from the manual below.
Attachments
I would go with the Triad C-3X https://www.mouser.ca/ProductDetail/Triad-Magnetics/C-3X?qs=/PiZ59IM4y3mDXgaoTBQJg==
It's 10H, 50mA and 500R which seems to fit the bill nicely.
It's 10H, 50mA and 500R which seems to fit the bill nicely.
I got C-7X a while back. I couldn't remember for sure that John mention around 100mA but C-7X works fine. I think C-3X as kodabmx link above since the told is around 40mA
Before I put in C-7X, I used to have R17 100r/5w. J7 at 620r (or choke), and R12 at 82r to get B+ at 290vdc . No problem at all without choke.
Before I put in C-7X, I used to have R17 100r/5w. J7 at 620r (or choke), and R12 at 82r to get B+ at 290vdc . No problem at all without choke.
I had someone recommend the below setup:
R17 is 100 ohm right now (keep it)
C11 to 3.3uf poly cap (currently 47uf)
J7 with a 100 ohm 5 watt
C12 to 470uf (currently 47uf)
Leave C13 at 47uf
C17 stays the same.
R17 is 100 ohm right now (keep it)
C11 to 3.3uf poly cap (currently 47uf)
J7 with a 100 ohm 5 watt
C12 to 470uf (currently 47uf)
Leave C13 at 47uf
C17 stays the same.
C12 to 470uf may be a mistake since this is tube rectifier, not diode PS version.
All my Caps are default as other people have built
J7 5watt is good, I put 3w and it got burn a little bit after a while. Now I use choke so I am not worry. I really can't tell the different between resistor and choke.
All my Caps are default as other people have built
J7 5watt is good, I put 3w and it got burn a little bit after a while. Now I use choke so I am not worry. I really can't tell the different between resistor and choke.
Just curious. Do you need a noise reduction? I have a 6SN7 Aikido and it is dead quiet on 98dB speakers.
I got hum with 6SN7 when I placed toroidal either left or ight of the 6SN7 tubes but everything is fine after placing 3" away behind the pcb power supply. Mine is 96dB speakers.
No hum on mine but I don’t have very efficient speakers.
Can y’all confirm GZ34 or 5AR4 work in this preamp?
Can y’all confirm GZ34 or 5AR4 work in this preamp?
I have 5AR4. Look at your manual of the 1st picture, you should see the rectifier tubes list under that PS.
Here is the old post
https://www.diyaudio.com/community/...o-all-in-one-octal-acf-2-buffer.330985/page-5
Here is the old post
https://www.diyaudio.com/community/...o-all-in-one-octal-acf-2-buffer.330985/page-5