Further liquidation of my over-sized tube collection. On-offer are Raytheon 12AU7 vacuum tubes/valves. There's a system for every tube, and a tube for every system. Here's an interesting, high-quality tube to try to see how it suits your own ears in your own gear. Here's a description (based on visual features) of the tubes on-offer: - All have long, flat/ladder plates with an O-getter. I've got quite a few these. All are tested on one or more of my professionally serviced/calibrated testers (Dan Nelson and Roger Kennedy) - Hickok RD1575, Hickok 6000A, Heathkit TT-1, TV-7D/U. Some're used, some may be new (always hard to confirm NOS more than 40+ years on). Some are in original boxes, some not. Some have great silkscreening, some may have none. Of course, test results and pictures will be provided for the actual tubes you're interested in. Pricing? A very fair range of $10.00USD to $18.00USD each, depending on type/vintage and condition. Paypal, money orders, or personal check payment preferred. Please contact me and we'll talk about what you're looking for. As always, negotiation is welcomed. Let's chat! Cheers, - SJ