JCN-9K - Tube test

Well, here is my tube PCB. All the MPSA42 are soldered underneath the Tube PCB. I would like to test my circuit in this fase to see if its everything ok. This is my first time using SMD components....
My doubt is What is the voltage that I can apply on the MPSA42 Base to close the circuit? Indicated on the picture as "?V"

Power Supply

Due the problems in my Prime Clock, I decided to build one Power Supply circuit to test my Tubes PCB to identify if the problem is in this PCB or not. And I will have one circuit to test all Tubes I have when necessary.

Below the Power Suply Circuit in test (Round PCB), and it works! Changing the trimmer value I can have 165 ~ 200 VDC.
Here one Z560M in test:

As soon as possible I will share here the Power Supply details.

Prime: Finished, but not working!

Well, I finished the project but unfortunatly the clock is not working.  
Now I will start searching for the solution. The desire I have is to throw it in the trash, but I had so much work and it was done so carefully that I will not give up so easily.
I will use only 9V as power supply, the circuit has two options. So I decided to use a jump, not a switch. One problem could be here, but according the circuit it is correct.

Project JCN-9K: Concluded

And here the final assembly:

Project JCN-9K: Arrived

The kit I bought on Ebay arrived. I built the kit in one day. Very easy and beautiful, just the case is boring, but as soon as possible I will change it.
The pieces:

Tubes:

PCB:

Soldering the components:

And the final test:

It`s Alive!!!!!!!

PRIME: Top Screen

Same process to print the top cover:

And checking the circuit, continuity.

Only one problem found, a miracle!!!! Using soldering the problem was fixed:

PRIME: New PCB

Well, after several problems trying to print the circuit using normal paper and photo paper, I decided to use a transparency paper. I found one step-by-step on the internet showing how to use this method. Print the circuit on a transparency paper and using a hot iron the circuit pass to the PCB.

Perfect!!!

Here my tip to hold the PCB to corrode: wine cork

PRIME: PCB

I am having several problems with my PCB. As the original project the lines are so small and are close each other, the corrosion process kills 2 PCB. Doing the continuity test I found several circuits interrupted. One solution is use soldering to fill the blanks, but as the lines are so close, another problem appeared… short-circuit! As I said, 2 PCB lost.

PRIME, JCN-9K and SPITFIRE

As I am conducting 3 projects in parallel, I will give names for each one as follow:

-          Project PRIME: The 6 digit clock, based on Andrea’s Instructables DIY.

-          Project JCN-9K: Single digit clock

-          Project Spitfire: Nixie kit from England

JCN-9K

In parallel I decided to develop another project, one Nixie clock single-digit. For now I will call it project JCN-9K. This clock will use a big case as a box, so space will not be a problem. So following one friend’s orientation, I will use one mobile charger to provide 5VDC in my project. Simple and cheap.

Items are arriving, and to maintain everything in order I use this kind of box. The tubes and other items like processor will spend more 30 days to arrive…