National NC-57

Details

Date of Manufacture:1947-1950

Manuals and schematics :

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Tube and Semiconductor Complement:

6SG7 rf, 6SB7 conv, (2) 6SG7 if, 6H6 det/avc/NL, 6SL7 af1/bfo, 6V6 af out, OD3 vr, 5Y3 rect

Model Notes

General Coverage Communication Receiver AM,CW 0.56 to 54MHz.

9 vacuum tubes.
1RF and 2IF(455kHz). BFO,AVC,ANL.