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Ultradyne L2 UV tubes

Ultradyne L2; Phenix Radio Corp.; (ID = 382720) Radio
Ultradyne L2; Phenix Radio Corp.; (ID = 483148) Radio Ultradyne L2; Phenix Radio Corp.; (ID = 148545) Radio
Ultradyne L2; Phenix Radio Corp.; (ID = 148543) Radio Ultradyne L2; Phenix Radio Corp.; (ID = 148546) Radio
Ultradyne L2; Phenix Radio Corp.; (ID = 148544) Radio Ultradyne L2; Phenix Radio Corp.; (ID = 1105457) Radio
Ultradyne L2; Phenix Radio Corp.; (ID = 1196189) Radio Ultradyne L2; Phenix Radio Corp.; (ID = 1288216) Radio
Ultradyne L2; Phenix Radio Corp.; (ID = 1288513) Radio Ultradyne L2; Phenix Radio Corp.; (ID = 1304371) Radio
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Ultradyne L2; Phenix Radio Corp.; (ID = 483148) Radio
Phenix Radio Corp.;: Ultradyne L2 [Radio] ID = 483148 765x252
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For model Ultradyne L2 UV tubes, Phenix Radio Corp.; New York
 
Country:  United States of America (USA)
Manufacturer / Brand:  Phenix Radio Corp.; New York
alternative name
 
Lacault, R.E.
Year: 1924/1925 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 8: UV201A UV201A UV201A UV201A UV201A UV201A UV201A UV201A
Main principle Superheterodyne (common); ZF/IF 115 kHz
Tuned circuits 7 AM circuit(s)
Wave bands Broadcast only (MW).
Details
Power type and voltage Storage and/or dry batteries
Loudspeaker - This model requires external speaker(s).
Power out
from Radiomuseum.org Model: Ultradyne L2 [UV tubes] - Phenix Radio Corp.; New York
Material Wooden case
Shape Tablemodel, Box - most often with Lid (NOT slant panel).
Dimensions (WHD) 32 x 9 x 10 inch / 813 x 229 x 254 mm
Notes The Ultradyne L2 was first manufactured for the UV201A with thoriated filament, which was announced in December 1922. In August 1925 the UV201A was withdrawn and replaced by the UX201A. They have later also been fitted with UX112, UX171 or UX171A but we don't put that into the tube line up as "or" because that was at least a year later of the UX201A variant.

The Ultradyne L2 is a super with RF reaction. Whether it is similar to the Keystone L2's is uncertain. The manufacturer Keystone Radio Service offered kits according to The Radio Trade Directory of Aug.,1925.
Two dials (primary tuning control knobs).
Siehe auch Triodensuperhets.
External source of data Ernst Erb
Source of data Radio Collector`s Guide 1921-1932
Circuit diagram reference Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)
Mentioned in The Radio Collector's Directory and Price Guide 1921 - 1965
Literature/Schematics (1) Rider's Perpetual, Volume 1 = 1931/1934 (1919 to 1931) (see misc. 1-11 Lacault)
Literature/Schematics (2) Radio Broadcast, Nov. 1924, p. 111


All listed radios etc. from Phenix Radio Corp.; New York
Here you find 15 models, 9 with images and 5 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



 


Forum contributions about this model
Phenix Radio Corp.;: Ultradyne L2
Threads: 1 | Posts: 1
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phenix: L2; Ultradyne
Konrad Birkner † 12.08.2014
02.Sep.11
  1

Die Besonderheit der Ultradyne-Schaltung liegt darin, dass die Mischtriode keine Anodengleichspannung erhält. Stattdessen liegt sie an der Oszillatorwechselspannung. und wird damit voll durchgesteuert.

Die Anodenspannung für die Mischtriode kommt galvanisch über mehrere Spulen (1.ZF-Filter und Eingangskreis-Rückkopplung) vom Gitter der Oszillatorröhre. Am Gitter der Oszillatorröhre steht die Schwingung leicht ins negative verschoben, mit 50 V positiver und 60 V negativer Halbwelle. Entsprechend an der Mischeranode (Oszillogramm ohne Eingangssignal, bei verstimmtem Eingangskreis).

20V/div.  

 
Phenix Radio Corp.;: Ultradyne L2
End of forum contributions about this model

  
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