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USA: Radio Catalog for the radio manufacturer Clapp-Eastham Co.; Cambridge, MA

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Model	Year	Category	Tubes	Pictures			Forum	Coll.Pr.
Blitzen Receiving Set	1912–15	mod-pre26		16
Blitzen Rotary Variable Condenser [1912 version]	1912–15	Radio part		3
Blitzen Transformer Type E	1910–20	Amateur-D		8				$
Blitzen Transformer 1/2 K.W.	1914–20	Radio part		4
Blitzen Transformer 1/4 KW	1912	Radio part		3				$
Blitzen Tuning Coil Single Slide	1916	mod-pre26		5
Ceco Tuning Coil	1910	Radio part		2
Crystal Receiving Set	1909–14	Crystal		1
Crystal Receiving Set Duck No. 60X43	1912	Crystal		2
Crystal Receiving Set No. 6040	1910	Crystal		1
Early Loose Coupler	1912 ?	mod-pre26		2				$
Improved Ferron Detector	1912	Radio part		10			1F	$
Improved Transformer Type L	1920 ??	Amateur-D		5
Laboratory Type Variable Air Condenser Y699 Y700 Y701	1919 ?	Radio part		1
Loose Coupler Crystal Receiver Dual Perikon	1913	Crystal		19				$
Oscillation Coil Double Slide	1909 ?	Amateur-D		5
Portable Transmitting & Receiving Set Duck No. 97X42	1912	Amat TRX		1
Radion Receiving Set	1916	Crystal		1
Receiving Set No. 14	1910	Crystal		1
Receiving Set No. 16	1910	Crystal		1
Rotary Variable Condenser Y735 Y736 Y774 Y775 [glass case]	1919 ?	Radio part		1
Transmitting Set Type A.C.C. [1/4 K.W.]	1909	Amateur-T		1
Turney Crystaloi Detector Type AA with Buzzer coupling	1917	Radio part		2
Turney Crystaloi Detector Type BB with Buzzer built in	1917	mod-pre26
Turney Crystaloi Detector Type O	1917	Radio part
Type B. Q. Wavemeter Z7042	1919 ??	Equipment		1
Variometer Type Z. R. V.	1920	Radio part		5
Wireless Receiving Transformer Loose Coupler	1909	mod-pre26		14				$
Wireless Telegraph Apparatus Catalog G	1910	Paper		25
1/2 K. W. High Potential Condenser Cat. No. W655	1914–16	Amateur-D		8

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