Possible that the crack happened later too. Like when it sat in the warehouse or when my buddy pulled the yoke. The arcing was inside the neck and puff of smoke came right off a spark gap on the neck board.
from what though? that is result of problem not root of problem.hv goes super high
Ive been looking at a replacement yoke and chassis solution but nothing good yet I tried a ms9-29 I got it to work but wasn’t happy. Chassis wise I’ve used Ms2932, ms2934 not happy with either. Blast is trash anyway, imo it’s my least favorite of all my cabs and I have a few.Those chassis are use and scrap, on the main there is little board placed vertically it should control the hv but if something go wrong in this little bastard, the Cassis just kill the the tube in one sec , releasing itself in "overload protection" Or in the worst case just ready to destroy another next tube!!!
You will never be able to repair this little board and also you should not risk to destroy another tube!
Its a long story, in short, the reason of the death of those tubes is caused by the materials used to assemble the tube itsef, at late of 90' some materials gone out of low and thats why the chassis destroy the tube, basically due to this, there is a G1 leackeage and in the same time the HV control on the chassis become crazy and a blue lightning through the entire kinescope , the chassis may remain in protection state or with HV-Overload pcb in not working condition just ready to destroy another tube.
The same happned to the late professional broadcastting monitor from sony, BVMs D series and late production of BVMs F1 and A series, Back in the Day In our shop (autorized sony service) we just replaced both Tube, defelction board and PA board the one wich control the HV (those monitors are modular) and at the time we serviced lots of BVMs with 100.000 hours of usage wich had all minor issues but not with fryed tube those ones were all produced earlier. Some of the later production like the D32 was at 40KUSD! those ones often failed even after 10.000 hours , we still have in stock lots of those tubes still boxed l
On the Blast you can put a nanao MS9 with Hitachi tube, it should fit flawlessly and surely will be way reliable.
Neck board from chassis from what I can gatherSo it is the tube not the chassis that is causing the CRT to go to air?
The chassis is definitely involved. My Blast tube blew when the faulty Yaton chassis was attached to it.
I think the point being made is that it only happens on newer tubes, not old ones. I've never heard of a A68KJU96X ever blowing up.
The chassis is definitely involved. My Blast tube blew when the faulty Yaton chassis was attached to it.
I think the point being made is that it only happens on newer tubes, not old ones. I've never heard of a A68KJU96X ever blowing u
And yes the chassis was the most advanced one ever made by Nanao simply do not match with the so fragile Toshiba tubes of its later production, the weirdest its that Orion acquired all Toshibas patents to make 29" Tubes also for arcade but those tubes are very reliable.They're not poorly manufactured. The tubes just have a flaw that if the chassis malfunctions in a specific way the tube can go out with it.
the weirdest its that Orion acquired all Toshibas patents to make 29" Tubes also for arcade but those tubes are very reliable.