• These commercial threads are for private transactions. diyAudio.com provides these forums for the convenience of our members, but makes no warranty nor assumes any responsibility. We do not vet any members, use of this facility is at your own risk. Customers can post any issues in those threads as long as it is done in a civil manner. All diyAudio rules about conduct apply and will be enforced.

AKSA's Lender Preamp with 40Vpp Ouput GB

I think I may have to move the preamp boards over to my Etsy shop as it’s too hard to keep track of the occasional request for boards here on a GB format. I will need to order more boards as all out at this point.

The daughter cards contain the core amp module. It lets you make different ones to tailor to your needs. Gain, headphone amp, bias current, components, etc. swappable gain is a useful addition to any preamp. The cores are very cost effective.
 
I agree. If you use Etsy it will be much easier to sell a small stockpile over time.

The tortoise wins the race, just make sure you have enough postage and packing in stock to keep special trips out to a minimum.
 
There are some people waiting for more preamp boards and I placed an order a few days ago. However running into some problems with them complaining about the Gerbers having 4 boards on one design. Even though same place made it for me last November. Anyhow, it may be another 10days until I get them.
 
...I am using an RK09 Alps pot from my pocket amp and attached a short piece of vinyl tubing to allow the shaft to be operated from the front...

What do you -and others- think about Vishay Cermet pots?
https://www.mouser.es/ProductDetail/Vishay-Sfernice/P11S2F0GGSY00D0063?qs=sGAEpiMZZMtC25l1F4XBU8qlp5jc3byHbnxw7aa6tIg%3d

https://www.mouser.es/datasheet/2/427/p11sp11a-239880.pdf

p11_SPL.JPG


Cermet potentiometers – Audial

Cermet potentiometers of course are not new, but are still relatively unknown. The reason they are used in the Model A is simple: they are sonically clearly superior to any other potentiometer type.

Still, they (apart form being somewhat fragile) have one shortcoming too: low level inter-channel miss-tracking. I am not aware if this was discussed previously anywhere, so more information on this follows...
 
Last edited:
Starting with preamplifier...


Waiting for some components...


I´ll write an illustrated manual...


Enclosure from HIFI2000 (24€).


JP
 

Attachments

  • A_L_complete.jpg
    A_L_complete.jpg
    317.8 KB · Views: 479
  • IMG_1624.JPG
    IMG_1624.JPG
    516 KB · Views: 476
  • IMG_1625.JPG
    IMG_1625.JPG
    632.5 KB · Views: 261