I've been conditioning a batch of ZM 1350 with varying amounts of cathode poisoning... Also some rather high initial strike voltages... The log extracts below are from one moderately poisoned tube and may give you an idea of what to expect. Several cathodes on this tube are still not fully recovered, but getting close!
Decoder key for the strike test records that follow: Strike, Cathode, prevVanode, prevHV, Vanode, Vhv, Ianode (mA), sweep, pairs, [Ianode (mA), Vanode], cond, seconds Cathode: cathode number on my tester... NOT the Telefunken cathode number. prevVanode, prevHV: voltage on anode before current was flowing... HV supply before current was flowing. Vanode, Vhv, Ianode (mA): Anode voltage and HV supply voltage once current began to flow... "Ianode (mA) is the current once the tube struck subject to a programmed current limit equal to the rated cathode current for the cathode under test. Sweep, <number of IV pairs> [<Ianode, Vanode>] Strike test records - first power up of the tube since I received it: Strike, 0, 192.62, 191.79, 151.72, 195.66, 0.68, sweep, 5, 0.68, 154.76, 0.56, 153.93, 0.52, 154.48, 0.36, 153.93, 0.36, 153.93, cond, 0 Strike, 1, 168.58, 168.30, 151.72, 170.51, 1.32, sweep, 5, 1.32, 155.86, 1.16, 155.86, 1.10, 155.59, 0.90, 155.31, 0.68, 155.59, cond, 0 Strike, 2, 173.35, 172.79, 152.09, 175.00, 1.00, sweep, 5, 1.00, 154.85, 0.84, 154.58, 0.84, 154.85, 0.72, 154.02, 0.52, 154.30, cond, 0 Strike, 3, 178.80, 178.52, 151.44, 181.01, 1.00, sweep, 5, 1.00, 155.31, 0.84, 155.03, 0.68, 154.76, 0.58, 155.03, 0.52, 155.03, cond, 0 Strike, 4, 178.59, 178.31, 144.91, 181.35, 1.32, sweep, 5, 1.32, 146.02, 1.22, 146.57, 1.00, 144.91, 0.84, 142.98, 0.74, 140.77, cond, 0 Strike, 5, 181.84, 181.56, 150.61, 185.16, 1.00, sweep, 5, 1.00, 155.59, 0.88, 155.59, 0.84, 156.14, 0.68, 155.59, 0.58, 155.59, cond, 0 Strike, 6, 178.80, 178.80, 150.34, 181.01, 1.00, sweep, 5, 1.00, 154.48, 0.92, 153.93, 0.72, 153.38, 0.52, 153.38, 0.52, 153.38, cond, 0 Strike, 7, 184.94, 184.66, 149.61, 187.70, 0.66, sweep, 5, 1.16, 154.58, 1.08, 154.30, 0.88, 153.75, 0.68, 154.02, 0.52, 154.02, cond, 0 Strike, 8, 156.97, 156.97, 152.55, 158.35, 1.00, sweep, 5, 1.00, 155.31, 0.94, 154.76, 0.84, 154.76, 0.68, 154.48, 0.52, 153.93, cond, 0 Strike, 9, 160.29, 160.29, 153.65, 162.22, 1.16, sweep, 5, 1.16, 155.59, 1.04, 155.31, 0.84, 154.48, 0.78, 153.93, 0.56, 153.93, cond, 0 Strike, 10, 173.55, 173.00, 150.89, 175.48, 0.72, sweep, 5, 1.32, 155.03, 1.24, 154.76, 1.04, 154.21, 0.68, 153.38, 0.52, 153.38, cond, 0 Strike, 11, 164.15, 163.88, 151.17, 166.09, 1.00, sweep, 5, 1.00, 153.38, 0.84, 152.82, 0.84, 152.82, 0.70, 152.27, 0.52, 152.27, cond, 0 Strike, 12, 149.78, 162.50, 152.82, 163.88, 1.16, sweep, 5, 1.16, 154.48, 1.00, 153.93, 0.84, 153.38, 0.74, 152.82, 0.52, 152.82, cond, 0 Strike, 13, 160.29, 160.29, 153.10, 162.22, 0.58, sweep, 5, 0.68, 155.59, 0.52, 154.21, 0.52, 154.48, 0.38, 153.65, 0.36, 153.65, cond, 0 Strike, 14, 217.21, 216.94, 151.44, 222.47, 0.36, sweep, 5, 0.36, 154.48, 0.24, 152.27, 0.20, 151.99, 0.20, 152.55, 0.20, 152.82, cond, 0 Strike, 15, 176.04, 175.21, 147.85, 177.97, 0.52, sweep, 5, 0.52, 151.44, 0.52, 152.27, 0.38, 152.27, 0.36, 152.82, 0.20, 152.82, cond, 0 Strike test records after varying amounts of conditioning... End of each record is number of seconds conditioning performed. Some cathodes were looking good after just 30 minutes conditioning, other have needed more time. Strike, 0, 155.03, 165.54, 155.86, 167.47, 0.52, sweep, 5, 0.52, 155.86, 0.52, 156.14, 0.40, 153.93, 0.36, 153.65, 0.36, 154.76, cond, 1800 Strike, 1, 156.69, 156.69, 157.52, 158.35, 1.34, sweep, 5, 1.34, 157.80, 1.18, 156.97, 1.08, 156.14, 0.86, 155.03, 0.68, 154.21, cond, 1800 Strike, 2, 156.23, 156.23, 157.89, 158.16, 1.02, sweep, 5, 1.02, 157.89, 0.86, 157.06, 0.84, 157.06, 0.76, 155.40, 0.54, 154.58, cond, 3600 Strike, 3, 156.97, 172.72, 157.52, 175.48, 1.02, sweep, 5, 1.02, 157.80, 0.86, 156.42, 0.68, 155.03, 0.58, 153.93, 0.52, 154.21, cond, 1800 Strike, 4, 170.31, 170.03, 146.57, 172.24, 1.34, sweep, 5, 1.34, 145.74, 1.18, 145.19, 1.02, 144.36, 0.90, 143.26, 0.70, 142.71, cond, 5400 Strike, 5, 158.16, 158.44, 158.44, 159.54, 0.52, sweep, 5, 1.02, 158.99, 0.92, 157.89, 0.84, 157.89, 0.68, 156.51, 0.60, 155.68, cond, 1800 Strike, 6, 168.02, 168.02, 159.46, 170.79, 1.02, sweep, 5, 1.02, 159.46, 0.92, 158.07, 0.70, 156.69, 0.52, 155.86, 0.52, 155.59, cond, 1800 Strike, 7, 160.29, 160.01, 158.35, 161.67, 0.50, sweep, 5, 1.18, 158.90, 1.08, 157.80, 0.88, 156.69, 0.68, 155.59, 0.62, 155.03, cond, 1800 Strike, 8, 158.07, 159.73, 158.63, 161.39, 1.02, sweep, 5, 1.02, 159.18, 0.84, 157.80, 0.84, 157.80, 0.74, 156.42, 0.52, 154.48, cond, 5400 Strike, 9, 156.42, 156.42, 158.35, 158.07, 1.16, sweep, 5, 1.18, 158.63, 1.10, 157.80, 0.90, 156.69, 0.68, 155.31, 0.52, 154.48, cond, 1800 Strike, 10, 155.03, 155.03, 156.69, 156.42, 1.04, sweep, 5, 1.34, 158.07, 1.18, 156.97, 0.84, 154.76, 0.76, 153.65, 0.56, 153.65, cond, 1800 Strike, 11, 158.07, 158.07, 157.80, 159.46, 1.02, sweep, 5, 1.02, 158.63, 0.92, 157.25, 0.86, 157.25, 0.68, 155.31, 0.60, 153.93, cond, 3600 Strike, 12, 158.35, 158.35, 158.90, 159.73, 1.18, sweep, 5, 1.18, 159.46, 1.02, 158.35, 0.84, 156.97, 0.74, 155.86, 0.54, 155.59, cond, 1800 Strike, 13, 153.20, 152.92, 155.13, 154.58, 0.52, sweep, 5, 0.68, 157.89, 0.52, 155.68, 0.52, 156.78, 0.38, 153.75, 0.36, 153.75, cond, 5400 Strike, 14, 161.94, 161.94, 158.07, 163.60, 0.36, sweep, 5, 0.36, 157.52, 0.20, 153.38, 0.20, 153.38, 0.20, 153.38, 0.20, 153.65, cond, 1800 Strike, 15, 160.01, 160.01, 154.76, 161.39, 0.52, sweep, 5, 0.52, 155.03, 0.52, 155.03, 0.36, 153.10, 0.36, 153.10, 0.24, 152.55, cond, 3600 -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. 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