I think the tube had good contact. When I replaced the tube I also had to undo and re-attach an "arm" that put downward pressure on the top of the tube effectively holding it in place. The amp is solid state; the only tube in it is the one pre amp tube, hence my assumption to re-bias it.
I'm a bit sketchy on the idea of going back to the shop. Its one of those guitar shops with used gear that’s WAY too old and beat up. I'm willing to cut my losses at $20 for the tube and be grateful the amp didn't permanently roast. I'll try order another replacement from a specialist (I’ve heard of this company named BOI AudioWorks…) and not chance smoking a bass amp in order to save $2-3. I have my eye on the 12AX7EH-GOLD you stock. I'm hoping it will fill the bill. Clean is what I am looking for.
John
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