Hello again, all! I bought a corroded, old Bogen E30 with the hopes of giving it a glorious second life. The Bogen E30 is a 6L6, cathode biased, paraphase, dual volume PA amp that has long since ceased to shush the churlish children of some long forgotten, godforsaken middle school. The original preamp tubes are two 7B4s (6SF5=½ of a 12AX7), one 7F7 (6SL7=12AX7), and one 7N7 (6NL7=12AU7). Because of the sever corrosion, I gutted the amp and will only be using the transformers, chassis, tube sockets, and tubes (possibly). The transformers both checked out good, thankfully. I don't know if I will use the choke, it is so heavy already. My question for the amazing TDPRI community: I was thinking about turning this into a 5E5a circuit. However, I'm don't know if I can expect pleasant results if I build it using octals tubes. If I swap the tubes to Octal equivalents to the 5E5a's two 12AY7, one 12AX7 compliment, can I just build it as is? Or would I have to draw out the load lines for each tube and essentially redesign this? More fun: If you were given the option to build a 6L6 amp with octal equivalents of 2 12AX7s and a 12AU7, what would you build? Or should I forget octals and convert to 9 pin? Here are some pics: Original Flavor. I plan to learn to screen print on metal for this. I will try to recreate the front panel's art deco style. Something close. Next up is painting the chassis and planning the layout.