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Title: What is the application for a high inductance low current choke? Post by: W8ACR on December 05, 2012, 08:10:23 AM What is the application of a 250Hy, 15mA choke?
Ron W8ACR Title: Re: What is the application for a high inductance low current choke? Post by: K3YA on December 05, 2012, 08:42:40 AM Audiophiles have used them for interstate coupling in single ended triode amplifiers or possibly output of a preamp.
Title: Re: What is the application for a high inductance low current choke? Post by: W7TFO on December 05, 2012, 10:51:16 AM Lots were used in regenerative receivers as decouplers.
73DG Title: Re: What is the application for a high inductance low current choke? Post by: W2PFY on December 05, 2012, 02:45:20 PM Quote What is the application of a 250Hy, 15mA choke? As a matter of factor, in at least one application RCA used chokes like yours in their 1 KW AM rig. My Westinghouse MW-2 speech amplifier/driver uses four 100 Henry chokes. Two are in the first voltage amplifier in the plate circuit and two are in the cathode circuit to drive a pair of 833A tubes. The voltage amplifier and cathode follower are (4) 807 yubes. It would be interesting to me if a side by side test were made, would the inductors produce a better audio waveform over an rc circuit? My guess would be that most pre 1940 BC transmitters would have uses inductors over RC circuits most of the time. Title: Re: What is the application for a high inductance low current choke? Post by: Opcom on December 05, 2012, 11:52:55 PM A 750H 1mA one was removed from a military scope. It has 10KV insulation.
Title: Re: What is the application for a high inductance low current choke? Post by: KM1H on December 06, 2012, 08:05:06 AM They have been in regens since the 20's and Ive seen in some early HP and other audio test gear. AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
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