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?
> each 3H and 30 Ohms. Across outer terminals I measure 6 H and 60 Ohms.
This would appear to be two cores in one box. Two 3H windings on one core, we expect 12H.
This would appear to be two cores in one box. Two 3H windings on one core, we expect 12H.
PRR,
Thanks for saying that. That was what I expected with regard to Choke #2. But why the common connector?
Thanks for saying that. That was what I expected with regard to Choke #2. But why the common connector?
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)