I have a couple of “tube golden era” chokes with multiple connections. My question is how those chokes are wound with regard to cancelling core saturation, and how could I use them properly.
Choke #1 has 4 terminals, marked with the “universal choke sign” between each pair of terminals, and 125 ma marked at each. I measure the inductance as 12.5 Henries, and 120 Ohm between each terminal. How do I determine the connections to use with this choke in a way that would cancel core saturation, when used as independent chokes for high voltage supplies to two channels of an amp.
Choke #2 is large (18 lbs) and has three terminals, 3 H and 30 Ohms between terminals. Current is unknown. So, it appears to be two chokes in series, each 3H and 30 Ohms. Across outer terminals I measure 6 H and 60 Ohms. How were these choke intended to be used? The question is if I could use it with input at center terminal for branched 3H chokes in a stereo HV supply? Would that cause an additive load on the core, if the design originally intended to be series chokes with a capacitor at the middel termimal?
Choke #1 has 4 terminals, marked with the “universal choke sign” between each pair of terminals, and 125 ma marked at each. I measure the inductance as 12.5 Henries, and 120 Ohm between each terminal. How do I determine the connections to use with this choke in a way that would cancel core saturation, when used as independent chokes for high voltage supplies to two channels of an amp.
Choke #2 is large (18 lbs) and has three terminals, 3 H and 30 Ohms between terminals. Current is unknown. So, it appears to be two chokes in series, each 3H and 30 Ohms. Across outer terminals I measure 6 H and 60 Ohms. How were these choke intended to be used? The question is if I could use it with input at center terminal for branched 3H chokes in a stereo HV supply? Would that cause an additive load on the core, if the design originally intended to be series chokes with a capacitor at the middel termimal?
I would suspect #1 to be a common mode choke. But #2 with only 3 terminals escapes me, unless it's 2, 3h chokes in parallel with input internally connected. I'd hook it to B- on the power supply, and see how it behaves. (It will still filter, and should it short it's at low potential, not high)
