NC-57

National Company; Cambridge & Malden (MA)

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Country
United States of America (USA)

Manufacturer / Brand
National Company; Cambridge & Malden (MA)

Year
1947–1951

Category
Amateur-Receiver (amateur bands, may include broadcast bands)

Radiomuseum.org ID
49602

- alternative name: National Toy Co.
- Brand: Thrillbox

Picture
Schematics

NC-57; National Company; (ID = 350792) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 350793) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 350794) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 350795) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 350796) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 350797) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 350798) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 350799) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 350800) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 350801) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 350802) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 350803) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 350804) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 350805) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 350806) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 350807) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 1417272) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 1417273) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 1417274) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 1417275) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 1417276) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 1417277) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 1417278) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 1417279) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 2685883) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 3056193) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 3056194) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 3056195) Amateur-R — National Company; NC-57 (3)

NC-57; National Company; (ID = 2756050) Amateur-R — National Company; NC-57 (1)
National NC-57

NC-57; National Company; (ID = 2756051) Amateur-R — National Company; NC-57 (1)
NC-57 bottom view with all new capacitors

NC-57; National Company; (ID = 267145) Amateur-R — National Company; NC-57 (2)
By courtesy of William Kendrick, USA

NC-57; National Company; (ID = 1116857) Amateur-R — National Company; NC-57 (2)

NC-57; National Company; (ID = 1116858) Amateur-R — National Company; NC-57 (2)

NC-57; National Company; (ID = 1116859) Amateur-R — National Company; NC-57 (2)

NC-57; National Company; (ID = 1116863) Amateur-R — National Company; NC-57 (2)

NC-57; National Company; (ID = 1116864) Amateur-R — National Company; NC-57 (2)

NC-57; National Company; (ID = 1116865) Amateur-R — National Company; NC-57 (2)

NC-57; National Company; (ID = 1116866) Amateur-R — National Company; NC-57 (2)

NC-57; National Company; (ID = 1417271) Amateur-R — National Company; NC-57 (2)

NC-57; National Company; (ID = 2049286) Amateur-R — National Company; NC-57 (1)

NC-57; National Company; (ID = 2049287) Amateur-R — National Company; NC-57 (1)

NC-57; National Company; (ID = 2754805) Amateur-R — National Company; NC-57 (2)
Allied Radio catalog ad for the NC-57

NC-57; National Company; (ID = 2754806) Amateur-R — National Company; NC-57 (2)

Click on the schematic thumbnail to request the schematic as a free document.

Technical Specifications

Number of Tubes
8

Valves / Tubes
6SG7 6SB7Y 6SG7 6SG7 6H6 6SL7GT 6V6GT 5Y3GT 0D3

Main principle
Superhet with RF-stage; ZF/IF 455 kHz

Wave bands
Broadcast plus more than 2 Short Wave bands.

Power type and voltage
Alternating Current supply (AC) / 105-130 Volt

Loudspeaker
Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 5 inch = 12.7 cm

Power out
1.5 W (unknown quality)

Material
Metal case

from Radiomuseum.org
Model: NC-57 - National Company; Cambridge &

Shape
Tablemodel, with any shape - general.

Dimensions (WHD)
419 x 298 x 222 mm / 16.5 x 11.7 x 8.7 inch

Notes
coverage 540 - 55000 kHz, AM, CM (BFO);
optional external S-Meter SM-57, optional 6V DC power supply NC-686S, optional select-o-ject

Net weight (2.2 lb = 1 kg)
14 kg / 30 lb 13.4 oz (30.837 lb)

Price in first year of sale
90.00 $

External source of data
Ernst Erb

Source of data
Communications Receivers

Circuit diagram reference
Rider's Perpetual, Volume 18 = 1949 and before

Mentioned in
Shortwave Receivers - Past & Present (3rd ed.)

Literature/Schematics (1)
Photofact Folder, Howard W. SAMS (Set 48, Folder 14)

Other Models
Here you find 446 models, 285 with images and 189 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from National Company; Cambridge & Malden (MA)

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The model is part of the collections of the following members.

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