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

Choose the only.

Model	Year	Category	Tubes	Pictures			Forum	Coll.Pr.
Blitzen Amplifying Coil	1917	Radio part
Blitzen Capacity Condenser	1917	Radio part
Blitzen Detector Stand	1917	Radio part		1
Blitzen Duplex Loading Coil	1912	Radio part		3
Blitzen Helices Oscillation Transformers	1917 ?	Radio part		3
Blitzen Radiocoupler	1917 ?	Radio part		2
Blitzen Rotary Variable Condenser [1912 version]	1912–15	Radio part		3
Blitzen Switch Cat. No. W782 10-point	1917	Radio part
Blitzen Transformer 1/2 K.W.	1914–20	Radio part		4
Blitzen Transformer 1/4 KW	1912	Radio part		3				$
Blitzen Type Transformer L [1/4 K.W.]	1914–20	Radio part		8				$
Blitzen Wave Meter	1917	Radio part		2
Ceco Tuning Coil	1910	Radio part		2
Ferron Crystal Detector	1908–12	Radio part		9
High Frequency Buzzer	1917	Radio part
Improved Ferron Detector	1912	Radio part		10			1F	$
Laboratory Type Variable Air Condenser Y699 Y700 Y701	1919 ?	Radio part		1
Rotary Variable Condenser Y735 Y736 Y774 Y775 [glass case]	1919 ?	Radio part		1
Turney Crystaloi Detector Type AA with Buzzer coupling	1917	Radio part		2
Turney Crystaloi Detector Type O	1917	Radio part
Universal Crystal Detector Type Y 675	1921 ?	Radio part		4				$
Universal Type Ferron Detector Stand Alone Crystal Detector	1917 ?	Radio part		11				$
Variometer Type S.S.	1919	Radio part		2
Variometer Type Z. R. V.	1920	Radio part		5
Bulletin FZ	1922	Paper		27
Bulletin Z	1920 ?	Paper		8
Catalog M Circa 1915	1915 ?	Paper		23
Catalog X 1916	1916	Paper		40
Radio Telegraph Apparatus Catalog S	1915/16	Paper		49
Wireless Telegraph Apparatus Catalog G	1910	Paper		25
Wireless Telegraph Apparatus Catalog M	1912	Paper		23

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