I haven't salvaged anything, Columbo. I'm leaving the tape recorders complete. They're not HMV 2202's as I first presumed. They where not yet in my possession when I made that assumption.So you salvaged the ECL86's from two HMV Model 2202 taperecorders? In a thread earlier this month you posted the schematic of the HMV 2202. The tubes in it are ECC83, ECL82 and EM84.
Thanks for the compliment!I haven't salvaged anything, Columbo.
Details . The amplifier applies resistors of the MLT-0.5 resistor, the C7-type separator capacitor, C71-7, can be used Capacitor K78, K73. The power supply is made on the power transformer from the Comet-201 tape recorder. You can apply unified TAN-28 transformers, TAN-29, as a last resort, when connecting an amplifier with automotive, you can apply the power transformer TS-180 from the black and white TV, although it is great for this design. DR5-0.08 chokes from Color tube TVs ULPCT, or the use of standard unified chokes D22, D31.
Electrolytic capacitors in anodic power supply K50-32 100MKFH3B, you can use condensers of other types to the same voltage, or above-400V. Instead of throttle, you can apply resistors MLT-2 with a face value of 250-300 ohms, but the capacity of electrolytic capacitors in this case is desirable to increase twice. Electrolytic capacitors in a straightener with a voltage of 50-100V.
When the amplifier is working on loading 8, you can apply TWZ-1-1 transformers, TVZ-1-2, TV-2Ans, TV-1-L-1 from black and white TVs. When operating on the load of 4 ohms, you can apply the TV-2S2S2, TWZ-1-9 from black and white and color tube TVs. When working on a load of 16 ohms, you can apply transformers of frame sweep of TCEs, but at the same time the ACH amplifier can narrow to 15-17 kHz.
Adjust the amplifier. With a good lamp and the correct installation, the first cascade in the setup does not need. Setting the second cascade to adjust the current current Tetrode lamps 6F3P in the range of 40-45 mA to control the performance in the cathode. At the same time, the voltage drop at the cathode resistor with a par value of 1 ohms should be within 0.04-0.045 per constant voltage. To select an amplifier with an automatic displacement, a selection of cathode resistors is required so that the current through the lamp at the output of the circuit is 40-45 mA, while the voltage drop on these resistors will be within 20-24 V.