National NC-300

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The National Radio Company, headquartered in Malden, Massachusetts, USA was incorporated, in 1914, as the "National Toy Company". Their expansion into home appliances led to the name change to the "National Company, Inc." The company moved in to the large scale manufacture of capacitors in the mid 1920s. It was at this time that two engineers, Fred H. Drake and Glen Browning, approached National to manufacture components to their specifications for a radio receiver of their own design. This led to the production and sale of the "National Regenaformer" kit for home construction. The set was capable of tuning the standard AM broadcast band only and could not receive shortwave. By the early 1930s National became well established with the amateur radio community based upon their line of regenerative receivers, including the SW-3 and SW-5.

The top-of-the-line HRO receiver was introduced in 1935. This radio included two RF amplifier stages and a crystal filter. The distinctive dial allowed KC (kHz) resetability and was a National trademark into the 1960s. This same basic design survived for over 20 years.

In 1939, National became a key supplier to the US and Allied governments when war broke out in Europe. The military ordered large numbers of receivers, particularly HRO's. When the United States entered the war some two years later, the word was, "Start building HROs; we'll tell you when to stop." Their number of employees went from approximately 200 to about 2500 during the war.

In the 1950s and 60s, National produced a wide range of amateur radio equipment. In 1965, National introduced the solid state HRO 500, which did not incorporate the famed HRO dial system, but instead featured a direct readout.

Into the 1980s, National survived as a government contractor and ceased development and production of civilian equipment. However, by 1991, amid continuing difficulties, the company ceased operation.

More information on National Radio Company:
Wikipedia reference on National Radio Company

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NATIONAL  NC-300 TUBE  KIT
NATIONAL NC-300 TUBE KIT
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National NC-300 Ham Radio Reciever ANL Switch Pote
National NC-300 Ham Radio Reciever ANL Switch Pote
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National NC-300 Ham Radio Receiver Front Panel Fac
National NC-300 Ham Radio Receiver Front Panel Fac
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NATIONAL NC-300 RADIO RECEIVER MANUAL ORIGINAL
NATIONAL NC-300 RADIO RECEIVER MANUAL ORIGINAL
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National NC-300 Signature Series Ham Radio Amateur
National NC-300 Signature Series Ham Radio Amateur
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1958 National NC-300 NC 109 NC-188 Tube Ham Radio
1958 National NC-300 NC 109 NC-188 Tube Ham Radio
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1958 Hammarlund HQ-110 HQ-100 National NC 300 John
1958 Hammarlund HQ-110 HQ-100 National NC 300 John
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 Vintage NATIONAL NC-300 / NC-303 / NC-125   HAM R
Vintage NATIONAL NC-300 / NC-303 / NC-125 HAM R
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Vintage Original National NC-300 Receiver Instruct
Vintage Original National NC-300 Receiver Instruct
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National NC-300
National NC-300
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National NC-300 NC300 Radio Receiver Manual
National NC-300 NC300 Radio Receiver Manual
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+ National NC-300 Ham Radio Reciever Left Hand Sid
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National NC-300 Ham Radio Reciever Tone Switch Pot
National NC-300 Ham Radio Reciever Tone Switch Pot
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National NC-300 Ham Radio Reciever OUTPUT Transfor
National NC-300 Ham Radio Reciever OUTPUT Transfor
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+ National NC-300 HAM Radio Reciever IF Switch Gea
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+ National NC-300 HAM Radio Reciever Tuning Dial P
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