Magtatanong lang if anyone can indulge me. Yung nakakita ng EL34 na STC sa Phasetron, do you know kung anong brand yung tube? One more thing if anyone has tried a SVETLANA EL34 vs. TESLA EL34. I've been looking at reviews pero parang mixed yung findings--some says better svet and some the tesla. Any experience? Thank you.