National HRO

Welcome to the Vintage Radio Gear site and the National HRO resource page. This site is designed to help you quickly and easily find the latest National HRO manuals, National HRO books, National HRO parts and accessories and National HRO radios for sale.

The National HRO information on this site is updated hourly, so if you are interested in the National HRO, bookmark this site so you can visit often.

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

National HRO EBay Bargains!

Manual Reprint For R-106 National HRO Receiver + L
Manual Reprint For R-106 National HRO Receiver + L
Ends in 7 Hours 30 Minutes 11 Seconds
Current price: $8.95 (0 bids)
First Production National HRO Receiver Serial D-72
First Production National HRO Receiver Serial D-72
Ends in 1 Days 16 Hours 42 Minutes 59 Seconds
Current price: $2,200.00 (0 bids)
National HRO Sixty Ham Radio Receiver with A B and
National HRO Sixty Ham Radio Receiver with A B and
Ends in 3 Days 10 Hours 42 Minutes 51 Seconds
Current price: $2.25 (2 bids)
National HRO7 Coil Set
National HRO7 Coil Set
Ends in 3 Days 14 Hours 40 Minutes 53 Seconds
Current price: $150.00 (0 bids)
NATIONAL HRO-50 MULTIBAND RADIO RECEIVER PHOTOFACT
NATIONAL HRO-50 MULTIBAND RADIO RECEIVER PHOTOFACT
Ends in 4 Days 13 Hours 9 Minutes 22 Seconds
Current price: $8.50 (0 bids)
NATIONAL  HRO-60 TUBE KIT (LESS 4H4c)
NATIONAL HRO-60 TUBE KIT (LESS 4H4c)
Ends in 5 Days 9 Hours 30 Minutes 38 Seconds
Current price: $99.00 (5 bids)
National HRO-W (HRO-5) Ham Radio Receiver w/ 697 P
National HRO-W (HRO-5) Ham Radio Receiver w/ 697 P
Ends in 5 Days 11 Hours 51 Minutes 26 Seconds
Current price: $1,695.00 (0 bids)
Military R-140/FSM Receiver( National HRO Series)
Military R-140/FSM Receiver( National HRO Series)
Ends in 6 Days 16 Hours 49 Minutes 20 Seconds
Current price: $12.00 (1 bid)
National HRO-60 Prototype Receiver Coil Storage Sh
National HRO-60 Prototype Receiver Coil Storage Sh
Ends in 8 Days 11 Hours 12 Minutes 20 Seconds
Current price: $389.95 (0 bids)
National HRO-500 Instruction Manual -  Premium Car
National HRO-500 Instruction Manual - Premium Car
Ends in 8 Days 22 Hours 37 Minutes 13 Seconds
Current price: $19.95 (5 bids)
National HRO G High Frequency Receiver Coil 180 to
National HRO G High Frequency Receiver Coil 180 to
Ends in 9 Days 12 Hours 24 Minutes 48 Seconds
Current price: $109.55 (0 bids)
National HRO G High Frequency Receiver Coil 100 to
National HRO G High Frequency Receiver Coil 100 to
Ends in 9 Days 12 Hours 26 Minutes 15 Seconds
Current price: $109.55 (0 bids)
National HRO HF RCAF HF Receiver Complete Setup W/
National HRO HF RCAF HF Receiver Complete Setup W/
Ends in 12 Days 14 Hours 7 Minutes 16 Seconds
Current price: $831.91 (0 bids)
National HRO-50 Dial Scale for C Band Spread  PN P
National HRO-50 Dial Scale for C Band Spread PN P
Ends in 12 Days 18 Hours 25 Minutes 20 Seconds
Current price: $24.95 (0 bids)
NIB tube set for National HRO Sixty receiver
NIB tube set for National HRO Sixty receiver
Ends in 13 Days 8 Hours 32 Minutes 14 Seconds
Current price: $75.00 (0 bids)
Ham radio coil  ’C’ National HRO Gener
Ham radio coil ’C’ National HRO Gener
Ends in 13 Days 14 Hours 8 Minutes 58 Seconds
Current price: $50.00 (0 bids)
1948 NATIONAL HRO-7R RADIO SERVICE MANUAL SCHEMATI
1948 NATIONAL HRO-7R RADIO SERVICE MANUAL SCHEMATI
Ends in 16 Days 7 Hours 12 Minutes 10 Seconds
Current price: $6.24 (0 bids)
National HRO Series Oriignal Manual Only
National HRO Series Oriignal Manual Only
Ends in 22 Days 11 Hours 13 Minutes 59 Seconds
Current price: $22.36 (0 bids)
NEW AMPHENOL 4 (FOUR) PIN MALE PLUG FOR NATIONAL H
NEW AMPHENOL 4 (FOUR) PIN MALE PLUG FOR NATIONAL H
Ends in 22 Days 20 Hours 47 Minutes 40 Seconds
Current price: $19.99 (18 bids)
NEW AMPHENOL 4 (FOUR) PIN PLUG SET FOR NATIONAL HR
NEW AMPHENOL 4 (FOUR) PIN PLUG SET FOR NATIONAL HR
Ends in 22 Days 20 Hours 47 Minutes 43 Seconds
Current price: $26.99 (14 bids)
National HRO-60TS Desktop Speaker for HRO-60 &
National HRO-60TS Desktop Speaker for HRO-60 &
Ends in 23 Days 20 Hours 57 Minutes 55 Seconds
Current price: $119.98 (0 bids)
National HRO-60 Ham Radio User Instruction Manual
National HRO-60 Ham Radio User Instruction Manual
Ends in 24 Days 17 Hours 20 Minutes 21 Seconds
Current price: $9.95 (4 bids)
National HRO-500 Hi Manual (photocopy)
National HRO-500 Hi Manual (photocopy)
Ends in 26 Days 16 Hours 8 Minutes 16 Seconds
Current price: $25.00 (0 bids)
National HRO Reception Set R-106 Receiver Manual
National HRO Reception Set R-106 Receiver Manual
Ends in 28 Days 9 Hours 32 Minutes 46 Seconds
Current price: $7.99 (0 bids)
National HRO-50-1 HRO50-1 Radio Receiver Manual
National HRO-50-1 HRO50-1 Radio Receiver Manual
Ends in 28 Days 9 Hours 32 Minutes 46 Seconds
Current price: $12.99 (0 bids)
National HRO-5 HRO-5T HRO-5R HRO HRO-SR Receiver M
National HRO-5 HRO-5T HRO-5R HRO HRO-SR Receiver M
Ends in 28 Days 9 Hours 35 Minutes 19 Seconds
Current price: $10.49 (1 bid)
National HRO-7 HRO7 Radio Receiver Manual Shortwav
National HRO-7 HRO7 Radio Receiver Manual Shortwav
Ends in 28 Days 9 Hours 35 Minutes 20 Seconds
Current price: $10.49 (0 bids)
NATIONAL HRO Communication Receiver Manual
NATIONAL HRO Communication Receiver Manual
Ends in 28 Days 9 Hours 35 Minutes 20 Seconds
Current price: $10.49 (0 bids)
Complete Set of 7 Coils for National HRO RAS-5 CNA
Complete Set of 7 Coils for National HRO RAS-5 CNA
Ends in 28 Days 19 Hours 18 Minutes 20 Seconds
Current price: $550.00 (0 bids)

Sponsored Links


Custom Search