[R-390] R-390a SS Conversion

[Mack McCormick]

Perry,

Charles provides an excellent template to SS your R-390a. He is a
wonderful gentleman and we collaborated often. I am the only other known
person to complete the project. Charles and I went through four design
changes as I SS's a R-390a. It is a rock solid design now.

Without knowing your technical/construction skills let me caution this is
not a trivial project and requires at least intermediate level skills.

I posted about my SS conversion on this list within the past three months.
You can search for the thread if interested.

Here are pictures of some of my work. Please note: The PC boards I made for
the SS tube replacements are no longer the current design. I will provide
you with the version 1 files but you will need to update them to the latest
design using KiCad (free on DigiKey).

Good luck and I'll be interested in your results if you undertake this
project.

https://photos.app.goo.gl/11AjyNCi2zV3T8LaA

73,

Mack
W4AX
https://www.qrz.com/db/W4AX