Antique radios, Old Time Radios

History of the manufacturer

Electrical Research Laboratories Inc. (Erla); Chicago, Illinois

ID = 721

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Name:	Electrical Research Laboratories Inc. (Erla); Chicago, Illinois (USA)
Abbreviation:	erla
Products:	Model types Tube manufacturer
Summary:	Erla = Electrical Reserach Labs; 2500 Cottage Grove Avenue, Chicago, Illinois - see also Sentinel Radio. Trade names Erla, Pearson, Ramway, Sentinel, Sky Rover, Tone Master. Generalvertretung Schweiz: J. Jäger, Radios en gros; Zürich - aber Genf = Arslanian.
History:	ERLA has not to be confused with Electrical Research Products Inc. which was connected to Radio Wire Television Inc. formerly Wholesale Radio Service Co. Inc. New York, Chicago, Atlanta, Boston, Newark, Bronx NY, Jamaica LI for the brand Lafayette.

Some models:

Country	Year	Name	1st Tube	Notes
USA	31/32	50-P	47	[3331455B]
USA	31/32	81 Ch= 245	24A	Phono input; push-pull af output stage.
USA	31/32	81-P Ch= 248	35	[3331444-1328]
USA	31/32	21-P	35	[3331444-1328B]
USA	31/32	61-P	35	[3331444-1328]
USA	29	noname?		One dial (primary tuning control knob)
USA	31	Short Wave Converter [Console?]		SW-Converter. Radio collectors Guide 1921-1932 notes a console. That is unlikely for a con...
USA	30	224-B	24	Phono input; push-pull af output stage.
USA	30	225	24	4-gang condenser; phono input; push-pull af output stage.
USA	31	22-P	35
USA	31	271	24	4-gang condenser.
USA	30	271-A	UY224	Cathedral with squared top; 4-gang condenser.