Antique radios, Old Time Radios
CV1490
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| Tube type: |
Pulse magnetron |
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| Identical to |
CV1490
= CV56D
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| Was used by |
Radar |
| Filament |
Vf 6 Volts / If 1.25 Ampere / Half indirect |
| Description |
This title replaces the CV56D.
CV56D was a frequency selection of CV56. At the beginning the selection was performed measuring the frequency of each sealed unit on a test bench and then adding the proper suffix, A to D, to the CV56 code. When the sealing process was automated, a special machine tuned the magnetron to the wanted frequency, by bending the strapping jumpers before the sealing-off. It was decided then to assign a different title to each possible frequency range.
Same specs of CV56D.
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