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CV2128

Information - Help 
ID = 19003
       
Country:
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Tube type:  Triode-Heptode   Frequency converter 
Identical to CV2128 = ECH81
Similar Tubes
Normally replaceable-slightly different:
  ECH83

Base Noval, B9A
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Parallel / series AC/DC /
Description

The CV specification for the CV2128 whose prototype is the Mullard/Philips ECH81 calls for 100% electrical testing at both high and low voltages. 250/100 volts for the heptode and 100 volts for the triode are the normal operating voltages for an ECH81.
However the requirement for testing at 15 volts for both sections indicates that such operation was envisaged prior to May 1953 when the second edition of the specification was issued.
Operation at these voltages is the requirement of the ECH83 rather than the ECH81 and tests have found that there is no difference between these two tubes and hence there was no CV specification required for the ECH83.(RJ)

 
Tube prices 1 Tube prices (visible for members only)
Literature -- Original-techn. papers.   
 
cv2128_mullard.jpg
CV2128: My tubes
Anonymous 413 Collector

 
cv2128_so.png
CV2128: rtt
Michael Schlör

 
gb_cv2128_spec_01.png
CV2128: Manufacturer's Data
Roy Johnson


Usage in Models 1= 1953 ; 1= 1955?? ; 1= 1960?? ; 2= 1962

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):5

Collection of a member from FIN

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