03-01-2013, 09:21 PM
Hammond sells a choke that can handle 150 mA, but its DC resistance is only 100 ohms.
In the MP VI, the B+ goes through two chokes (and four electrolytic capacitors, the first two in series) before it hits the 680 ohm section of the speaker field. There is yet one more electrolytic following the other side of the field.
Since there are already two chokes in the power supply, this is why I'm not really worried about the replacement for the 680 ohm field not being another choke. I just need to drop 98 volts so the B+ hitting the screen grids of the 6L6G tubes, and the voltage divider resistor network inside the tuner, is not excessive.
In the MP VI, the B+ goes through two chokes (and four electrolytic capacitors, the first two in series) before it hits the 680 ohm section of the speaker field. There is yet one more electrolytic following the other side of the field.
Since there are already two chokes in the power supply, this is why I'm not really worried about the replacement for the 680 ohm field not being another choke. I just need to drop 98 volts so the B+ hitting the screen grids of the 6L6G tubes, and the voltage divider resistor network inside the tuner, is not excessive.
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Ron Ramirez
Ferdinand IN
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