An all solid-state dynamic headamp design by Dr Kevin Gilmore.

Official thread: http://www.head-case.org/forums/topic/9768-kg-balanced-dynahi-build-discussion-thread/

There are 2 options for the Dynahi. Onboard or offboard heatsinks.

__Schematics:__**Amplifier:**

http://gilmore.chem.northwestern.edu/dynahiver2a.pdf

__Latest silkscreen:__**Power supply:**

Either use the offboard PSU below, or AMB Sigma22. Recommended dual PSUs.

Board dimensions(mm):

__Latest BOM:__

__Important notes:__

Am I correct in assuming that in the BOM, column E is the values of the required resistors, and column F is the number required?

ReplyDeleteAlso, what sort of power handling and tolerances does the Dynahi require?

Lastly, is there a maximum resistor size? (e.g., don't go above 1/4W or use Vishay RN series, otherwise the resistors won't fit?)

Many thanks in advance for your help.

Yes, that's correct. I forgot that the quantity is for 2 amps, so just use half of it for a single build.

ReplyDelete1/8w and 1% resistors is fine. The board could take up to 1/2w resistors.

A dual S22 configured for 30v is recommended. Dual 30v+30v/80va transformers would be perfect too.

Thanks for the very quick response, Lil' Knight.

ReplyDeleteI have a few questions if you permit :

ReplyDelete1- What components to change for a balanced gain of around 10 (onboard version) ?

2- Is it better to use 500mW resistor (if they fit) ?

3- For S22 PSUs, can you recommand a DEL ? I absolutely don't know how to chose one !

Thanks