Recent content by SpoonyBard

Had this thread loaded for a while until I had a chance to test my board out. Cap at C4 is 470uf 16V as you mentioned. The red dots are there on my board too.

I recently picked up an untested 25k7401 locally and lucked into what appears to be a pretty nice monitor. Burn free, great colors, but it has some pincushioning as seen in the image attached. I just replaced all of the electrolytics and the issue persists. Adjusting height/width does not...

Great job on these, they look fantastic.

Left the monitor running for over an hour and noticed that the picture was dark, but still visible. A drastic improvement over its previous setting. Adjusting the focus setting on the flyback still causes the picture to get significantly brighter. However it still fades over several seconds...

Shotgunned this one. I noticed that the retainer for the convergence rings was not straight, so I adjusted that. Then I reflowed every pad on the neckboard. Currently the monitor has been running for 20 minutes with no issues. The convergence is way off. But it's a start at least.

Revisited this chassis again tonight. Powered on and saw retrace lines then the picture went entirely white regardless of adjustments. Set everything to 12 o clock, adjusted the flyback with no change. Shut down and reapplied power, then received an image that faded to nothing but very dim...

Replaced all the caps and reflowed the input pins. Monitor came up and the picture stayed on screen. Color is off and needs some ring adjustments. No red color at all. This chassis came out of a cabinet with a necked tube and the red cutoff pot was damaged. The pot was already replaced, so I am...

Installed the new flyback and the screen still shows no picture unless the focus is adjusted. It stays on longer and is brighter, but still fades out gradually after the adjustment is made.

Found this in archives of the Bestech website today looking for more information on the Bestech chassis. Haven't seen this part list posted anywhere else, so i'm leaving it here in case it is useful to anyone else.

Took a video of the issue at hand: https://vimeo.com/864256641?share=copy

Swapped the yoke tonight and things look a bit better as far as picture dimensions go. Still need to dial it in, but i need to get a consistent picture first. Adjusting focus on the flyback displays an image that fades to black. I have a new flyback on the way, as well as a cap kit, but I...

Checked the heater voltage and pinout of the original tube (a48qad220x) and it seemed like everything should be good. Decided to let it rip and threw the chassis in. I get neck glow, but heard some arcing and could not see a picture. Cleaned the anode cap and the arcing calmed down...

Absolutely. Sent you a pm.

Received my order and these look great. Thank you again for doing these!

Found a good deal semi-local for a different chassis. Picked up a Torvis mtg-2901cn (1901cn? Chassis has both markings) with an original yoke. This tube (a48krd82x02) seemed like a good swap for it. The current yoke on the tube is a dse-1992nl measuring 13.5/1.8 ohms. The yoke that came with...