2025年1月9日 · Re: K-101A Battery Eliminator Post by ACORNVALVE » Jan Sat 11, 2025 1:52 am Sirtar wrote: Jan Sat 11, 2025 1:47 am forgot to tell you all last time that r3 r4 get very hot in fact they will burn you if you leave your finger there.

2009年9月14日 · I think that it really depends on what sort of battery sets you intend to use the battery eliminator for. On a late thirties to early fifties farm battery set it's fairly simple, it's basically "A" and "B", 1.4 volts and 90 volts DC respectively.

2017年12月25日 · Actually it is an "A" battery charger combined with a "B" battery eliminator. When switched OFF it charges the A battery. When switched ON it turns off the battery charger and sends A voltage to the output posts from the battery, which would be inside the unit in the empty space on the right side.

2019年11月7日 · I just finished the battery eliminator kit K101A from Antique Electronic Supply and it came on with no problems except the B voltages are off: 22V is 25.5, 45V is 48.5, 67V is 71.5, 90V is 94.6, ?V is 118, 135V is 141. My radio is a Philco 38-38. Will these voltage differences cause any problems? Thanks in advance!

2025年1月21日 · Knight Battery Eliminator causes humming in battery radio Last post by Mr. Detrola « Mar Sun 30, 2014 10:55 pm Posted in Test Equipment and Tools Discussions

2018年8月9日 · Still trying to get this battery eliminator to work first. I have replaced all the caps. The 5Y3 tube checks good on my tester. R1 reads about 3400 ohms instead of the 2500 ohms called for, but I doubt that is my problem. The "B" voltage reads too high, about 164 volts at the + and - jacks. This is with nothing hooked up to it.

2018年6月1日 · Post subject: Re: K-101A Battery Eliminator problem If you add the zener diode voltage drops of 4 11-volt diodes you get 44 volts dropped after the 90 volt tap. 90 volts + 44 volts = 134 volts. The diodes limit the voltage due to the circuit design and the resistance of the load (which must draw more than approximately 50 ma).

2012年3月20日 · Right now, my only battery eliminator is an AES solid-state unit. I'd like to try to build a tube-type A-B-C eliminator, though, partly for the fun of it, and partly to avoid the headaches that solid-state units can have (like requiring the radio to be connected to an actual earth ground rather than a mains ground).

The impetus to be rid of messy, leaky wet cell batteries and separate chargers drove the need for B+ supplies. Smith's work and its embodiment by the American Appliance. Corp. commercially produced "The Raytheon" gas tube rectifier that made so many battery eliminator companies prosperous. Eventually the name of the tube was adopted as the name ...

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