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History of the manufacturer  

Lengyel István gépészmérnök (Sure); Budapest

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Name: Lengyel István gépészmérnök (Sure); Budapest    (H)  
Abbreviation: lengyel
Products: Model types

Lengyel István gépészmérnök
Budapest, Thurzó köz 4

Products: Reiss microphone, speaker, pick-up, radio receiver etc. usually sold under trade mark "Sure".

Founded: 1934
Production: 1934 -

This manufacturer was suggested by Sandor Selyem-Tóth.

Some models:
Country Year Name 1st Tube Notes
26–38 Microphone Reisz   1926: National Radio Exhibition (Cinema report) 
32 Headphones Sure   2× 2000 Ohm. 
40 Sure Permavox 7W   4 Ohm.  
46 Dektoros rádió Sure BPI. & BPII. [inductive tuning]    
38 Mikrofon Crystal Piezophone   30-10000 Hz. 
38 Pick-Up Crystal Szuper    
40 Erősító - Power Amplifier    
38/39 Super Sure   Band: 10-95m. Delivered in battery, AC and UC supply modification. 
46/47 Dektoros rádió Sure 2 BPI. & BPII. [capacitive tuning]    
40 Erősító - Power Amplifier 100W    
46/47 Dektoros rádió Sure 1 BPI. & BPII. [capacitive tuning]    
38 Sure 30/10 AF7  Pout:: 10W 


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

Rádiótechnika 1937.tbn_h_lengyel_reisz_front.jpg
Thanks for Mr.Tóth Ferenc, Hungary, Pomáz and Első Zalai Rádiómúzeum Alapítvány, First Zala County Radio Museum Foundation.tbn_h_lengyel_sure_permavox_front.jpg
Thanks for technical assistance Első Zalai Rádiómúzeum Alapítvány (, First Zala County Radio Museum Foundation, Hungary, Zalaegerszeg.tbn_h_lengyel_sure_logo.jpg
Thanks for Mr.Perneky Sándor, Verőce Rádiómúzeum ( ), and Első Zalai Rádiómúzeum Alapítvány, First Zala County Radio Museum Foundation.tbn_h_lengyel_reklam_1938.jpg