ZENITH MODEL H500
REFERENCES:
NATIONAL RBH-2, CNA-46188 RECEIVER
The National NC-156-1 was manufactured during WW2 for the US Navy as Type CNA-46188. Similar in appearance to the National Company NC-100XA. I am not sure where I got this. It might have come from my friend, John Tolhurst.
FREED-EISEMANN MODEL NR-5
Reception principle |
TRF without reaction (non regenerative); 2 AF stage(s); Neutrodyne |
Tuned circuits | 3 AM circuit(s) |
Wave bands | Broadcast only (MW). |
Details | |
Power type and voltage | Storage and/or dry batteries / 6 & 2 x 45 Volt |
Loudspeaker | - For headphones or amp. |
Power out | |
from Radiomuseum.org | Model: NR-5 - Freed-Eisemann Radio |
Material | Wooden case |
Shape | Tablemodel, low profile (big size). |
Dimensions (WHD) | 28 x 9 x 8 inch / 711 x 229 x 203 mm |
Notes | The Freed Eisemann NR-5 is a battery operated 5 tube BC band receiver. It was the firstNeutrodyne offered from Freed-Eisemann (April 1923). The NR-6 followed in October 1924at the same price. The original tube compliment recommended by the manufacturer was UV201A tubes in all positions.
The "Freed-Eisemann Dealer Catalog 1924" lists the models NR-5 (from April 1923), NR-6,NR-12, NR-20, NR-215, NR-400, Speaker FE-50 for models NR-5, NR-6 and NR-20,Speaker Console FE-150 matching NR-20, and FE-5C.
Two different radio's were closely examined and the published schematics did not match these two radio's. The published schematics show a C battery, but the actual radio's have no means to connect a C battery. The published schematics show the first 2 tube filaments controlled by a reostat and the last 3 tube filaments controlled by another reostat, but the actual radio's have 1 reostat for the detector tube filament and the other reostat controlling the remaining 4 tube filaments (which also matches the front panel engraving for the controls, which are "DETECTOR TUBE" and "AMPLIFIER TUBES"). There are other small differences, such as no capacitor across the speaker output jack. A schematic was made from the actual radio's and was uploaded to this model.
There is a version of this radio that uses a C battery and matches the original published schematic. There are no external connection posts for the batteries, instead the battery harness is built on to the radio internally. |
Net weight (2.2 lb = 1 kg) | 10 kg / 22 lb 0.4 oz (22.026 lb) |
Price in first year of sale | 150.00 $ |
Collectors' prices | |
Source of data | Radio Manufacturers of the 1920's, Vol. 2 |
Circuit diagram reference | Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931) |
Mentioned in | Radio Collector`sGuide 1921-1932 (Collectors) |
Literature/Schematics (1) | Le Guide du Coll.Biraud/Foster 1 (page 168) |
Literature/Schematics (2) | Collector's Guide to Antique Radios 7th Edition (Radio Broadcast, Sep. 1923, p. 441) |
Literature/Schematics (3) | Gernsback Official Radio Service Manual (Volume 1, 1930 Page 166A) |
Literature/Schematics (4) | Rider's Perpetual, Volume 1 = 1931/1934 (1919 to 1931) (Riders (Freed) Page 1-1) |