You are bidding for 1 piece SRS501 tube from Rudolstadt. This is direct equivalent to better known RS391 tube. I had 4 pieces available for sale, but last one remaining only. Tubes were tested on Funke W19 tube tester according 2009 test card settings. Test results are 80, 78, 74 & 79mA, there minimum good is 40mA. Available tube has 78 mA test.Check actual photos for details. Private selling. I’ll prepare good package and post worldwide, but will not assuming responsibility for tube damage during postage due age and gently specific. Payment should be done within 3 days. Bid accordingly with posted above. Contact seller for any questions. Check my other power tube auctions. Happy bidding. Dont loose opportunity.

You are bidding for 1 piece SRS501 tube from WF. This is direct equivalent to better known RS391 tube. Tube was tested on Funke W19 tube tester according 2009 test card settings. Test result is 72mA, there minimum good is 40mA. Perfect result. Check actual photos for details. Private selling. I’ll prepare good package and post worldwide, but will not assuming responsibility for tube damage during postage due age and gently specific. Payment should be done within 3 days. Bid accordingly with posted above. Contact seller for any questions. Check my other power tube auctions. Happy bidding. Dont loose opportunity.

You are bidding for 1 piece SRS501 tube from Rudolstadt. This is direct equivalent to better known RS391 tube. I had 4 pieces available for sale, but last one remaining only. Tubes were tested on Funke W19 tube tester according 2009 test card settings. Test results are 80, 78, 74 & 79mA, there minimum good is 40mA. Available tube has 78 mA test.Check actual photos for details. Private selling. I’ll prepare good package and post worldwide, but will not assuming responsibility for tube damage during postage due age and gently specific. Payment should be done within 3 days. Bid accordingly with posted above. Contact seller for any questions. Check my other power tube auctions. Happy bidding. Dont loose opportunity.

You are bidding for 1 piece SRS501 tube from WF. This is direct equivalent to better known RS391 tube. Tube was tested on Funke W19 tube tester according 2009 test card settings. Test result is 72mA, there minimum good is 40mA. Perfect result. Check actual photos for details. Private selling. I’ll prepare good package and post worldwide, but will not assuming responsibility for tube damage during postage due age and gently specific. Payment should be done within 3 days. Bid accordingly with posted above. Contact seller for any questions. Check my other power tube auctions. Happy bidding. Dont loose opportunity.