ALTA Fidelity Dynaco Mark III 6SN7 and 12SN7 Driver Board

Prototype - 02/15/2023

Why provide a wide body driver board for the Dynaco Mark III?

Many of the modern driver boards are smaller in size and fit the original post-1970 Dynaco chassis well (in addition to the modern reproduction chassis). For those of us that prefer to keep the original chassis, we're left with a gap that either needs to be covered with a shim or another workaround needs to be incorporated to allow for the smaller screw mountings. The first iteration of my driver board is a wide body approach that will let you skip the retrofits.

Here is a comparison of an original driver board with a modern driver board sold by Tubes4HiFi.com.

Does the driver board come with all necessary parts and components. Are they quality pieces?

I think so! Power capacitors are Nichocons, and for sound quality, I use Mundorf capacitors and Amtrans resistors. Some may argue that these are unnecessary, overpriced boutique components. Cool. I sell blank boards as well!

I want to choose my own components. Do you sell blank driver boards?

Of course!

Why allow for the interchangablity of 6SN7 and 12SN7 tubes?

Why not? 6SN7 are more commonly used on driver boards and therefore a bit more expensive. The 12SN7s, on the other hand, are generally less expensive and require the use of higher voltage. This means lower current and less noise.