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History of the manufacturer  

Radio Products Company, The (Dayrad); Dayton, OH

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Name: Radio Products Company, The (Dayrad); Dayton, OH    (USA)  
Abbreviation: radiopro
Products: Model types
Summary:

The Radio Products Company
Fifth & Norwood, Dayton, Ohio (1933)
125 Sunrise Place, Dayton, Ohio (1935)

Brand: Dayrad

Tube checkers and measurement devices.
History:

From begin 1930 onwards, Radio Products Company began using the brand Dayrad for their products, after E.T. Flewelling had resigned.

In Dec. 1935 they are a subsidiary of Bendix Aviation Corp.

This manufacturer was suggested by Wolfgang Scheida.

Some models:
Country Year Name 1st Tube Notes
USA  31 DayRad "Volt-Ohmmeter" 309    
USA  33 Oscillator 31 30   
USA  32 Test Meter 3151 30   
USA  31 MF Oscillator 330 30  Output frequencies: 130, 175, 200 and 250 kilocycles. 
USA  31 DayRad "Output Meter" 400W    
USA  29 DayRad 870 82   
USA  29 DayRad "Output Meter" 875    
USA  29 DayRad 180 unknown_Tube   
USA  30 DayRad "Output Meter" 21    
USA  31 DayRad 8-80    
USA  29 DayRad HR    
USA  30 DayRad Tube Checker Type B   Four tube sockets; one ampere meter up to 20 mA. 
[rmxhdet-en]

Further details for this manufacturer by the members (rmfiorg):

Forum contributions about this manufacturer/brand
Radio Products Company, The (Dayrad); Dayton, OH
Threads: 1 | Posts: 2
Hits: 992     Replies: 1
Radio Products Corp., The (Dayrad); Dayton
Martin Moore
05.Apr.20 		  1
Radio Products Corp., The (Dayrad); Dayton 

Regarding the entry for "Radio Products Corp., The (Dayrad); Dayton or Newark. I believe there is evidence that the Dayrad product line was produced only by the Radio Products Company of Dayton, Ohio. An advertisement for a tube tester in the In Service magazine, March 1935, identifies The Radio Products Company (not Corporation) as being located at 125 Sunrise Place, Dayton, Ohio.

There is much confusion about products provided by the various companies named with some variation of R.P.C. Those from Dayton come from the Radio Products Company of Dayton, Ohio. One variant of the Radio Products Corporation was created in 1929 in Newark/Hoboken, New Jersey. See Radion Broadcast Magazine, November 1929, p. 35.
Mark Hippenstiel
23.Jul.20 		  2
Radio Products Corp., The (Dayrad); Dayton 

Hello Martin,
You are absolutely correct! It can be rather difficult to tell those companies apart, especially when there are errors (or omissions) in the literature (abbreviating a Corporation with Co. for instance).

One major error that has now been fixed was the confusion between Co. and Corp. between Dayton and Newark. We have also looked at RPM, RPC Chicago (Continental / Admiral) and a few other companies, updated those entries and moved a bunch of models to a new (and hopefully correct) home.

There might still be a few models remaining that need to be moved. Feel free to have a look.
At some point I might compose a forum thread similar to Peerless which also gives a comprehensive listing of the Peerless companies.

Best regards
Mark
 
Radio Products Company, The (Dayrad); Dayton, OH
End of forum contributions about this manufacturer/brand
  
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