[Hammarlund] HQ-110 Regulator tube acting up

[Al Schichler]

I have an HQ-110 that has worked fine for close to a year, but when I 
fired it up the other day, the OB2 tube was glowing and flashing really 
bright orange. I could see it through the dial scales. Almost looks like 
a fire is starting inside. I also can hear an oscillation in the speaker 
when that happens.
I know it normally glows, but not enough to light up the whole inside of 
the radio. I was just wondering if this might be a problem anyone else 
has run into. I haven't taken the radio apart yet, so I don't know if 
replacing the tube will fix the problem, or if something is shorting out 
like a capacitor, and causing the tube to go crazy.
I might have another OB2 in my boxes o' tubes, but I haven't checked 
yet. If not, I might be in the market for one.

Thanks for any info,
Al, WA2S