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Homebrew Crystal Radio version with fake crystal?

ID = 310395

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Atwater Kent Mfg. Co: Homebrew Crystal Radio [mod-pre26] ID = 2384344 1400x1050

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For model Homebrew Crystal Radio version with fake crystal?, Atwater Kent Mfg. Co.; Philadelphia, USA:
Collection privée (réf.: 1828)

Country:

Manufacturer / Brand:

Year: 1923 ?

Category: Radio module pre 1926 (not a part, not a key)

Details
Power type and voltage	No Power needed
Loudspeaker	- For headphones or amp.
Power out
from Radiomuseum.org	Model: Homebrew Crystal Radio [version with fake crystal?] - Atwater Kent Mfg. Co.;
Dimensions (WHD)	385 x 150 x 255 mm / 15.2 x 5.9 x 10 inch
Notes	Homebrew crystal radio using a Part No. 4200 Type 2A Crystal Detector and a Part No. 3741 Variometer. A similar assembly is shown in Douglas I, page 73, with title "Ralph & Elinor Williams". Those boards were made by local entrepreneurs and also radio amateurs and private persons. Alan Douglas wrote: "While Atwater Kent never sold a complete crystal set, local entrepreneurs did, using his parts. The few that were made in the factory, were donated to hospital patients. Kent did make electrical and mechanical prototypes for two crystal sets, the size of a type II tuner base, one of them using a compression tuning condenser, but the project was abandoned." See also US patent 1'679'310, filed May 28, 1923 for a Detector Apparatus. The crystal detector for this set is likely a fake, so we created a separate model page as a variant for it.
Net weight (2.2 lb = 1 kg)	1.8 kg / 3 lb 15.4 oz (3.965 lb)
Collectors' prices
Mentioned in	Radio Manufacturers of the 1920s, Vol 1 (Page 73)

Model page created by Museum Musée des Radios. See "Data change" for further contributors.

All listed radios etc. from Atwater Kent Mfg. Co.; Philadelphia, USA
Here you find 502 models, 319 with images and 325 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.