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Originally Posted by vintagecollect
Thanks for response one and all. What year is that article dangler, I've never seen a double slider coil?
This is basically the same as a loose coupler coil, just w/o the loose part. I believe this to be an early coil, is larger than most coils and lacks bakelite anywhere in construction. I have not seen any coil similair to this.
I believe this to be used when radio was experimental and or for wireless gap too.
The loose coupler coils go for a lot of money and accomplish same thing, most don't have any patent dates, teens mostly.
Yes, those are type C headphones, They ARE awesome!
Can anyone tell me what the benefit of a double galena detector like AK's does?
Does anyone have 1910 to 1915 galena construction details to give my set a period correct detector?
Thanks for early web info, info is sparse and scattered.
IS there any clubs that Have this type of stuff? I've had complicated inventions from last century, primitive items are zero maintainance.
I recently got interested in these, to have an early tube radio, you want early tubes. Those tubes are only getting more expensive. Just too involved for my interests.
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It's from 1923. The article came from a small booklet called "100 Radio Hookups" by Maurice L. Muhleman. It was published by The E.I. Company. I don't know if that was a forerunner of EICO or not. It pretty much covers everything from crystal sets to Regerative, Neutrodyne and Super Heterodyne radios using anywhere from one tube to six tubes.
There is one interesting diagram that uses a crystal detector and one tube for audio amplification. Probably an 01A.
If you,or anyone else,would like some of the diagrams,I would be more than happy to post them. There is a total of 48 pages. I also have another booklet titled "All American Radio-Hookups" by Rauland MFG. Co. It's also from 1923 and covers homebrew sets using only tubes. I'm sure some of you have heard of All American Mohawk. Same outfit. Hope this helps. Good luck. Dan