Thanks for all the suggestions/advice, but I have to keep this bike on the road regardless of it's crack.
I try to keep my rear-end off the saddle, so not to create down force that might increase the cracks size.
I have to use this bike on a daily basis, so I have to for go the risk. I really don't think it will have a catastrophic failure any time soon.
A new frame is what's really in order here and I think you all have convinced me of that.
Any repair I do that doesn't involve wielding is futile.
Thanks all...

PS, I am the original owner, but have modified the bike that there are no longer any original parts left, except for the frame...