Good progress!
Actually, the change @nixiebunny recommended is probably simpler than you
imagined.
If you are using a center-tapped transformer, with the center tap tied to
ground, just put a variable power supply between the center tap and your
GND, then vary a few volts. You may need to reve
The big problem of my PCB is everything is tied up, so it is hard to fix.
Well, these lesson can go to my next design.
On Fri, Nov 13, 2015 at 9:37 PM, David Forbes wrote:
> You may be able to correct the "off" brightness by controlling the DC
> voltage of the center tap. That will change the bi
You may be able to correct the "off" brightness by controlling the DC
voltage of the center tap. That will change the bias voltage on the
cathodes relative to the grids.
However, I have no experience working with these tubes.
On 11/13/15 7:30 PM, Chaos Hydra wrote:
I made a clean cut on the
Read the Noritake guide, that was previously listed. All VFDs are directly
heated. No separate cathode. The filament is in between your eyes and the
glowing anode/segments all the way in the back. Your problem is due to the
anode cathode voltage difference not being the same for each tube. I thi
