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!

NATIONAL  HRO-60 TUBE KIT (LESS 4H4c)
NATIONAL HRO-60 TUBE KIT (LESS 4H4c)
Ends in 4 Hours 24 Minutes 48 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 6 Hours 45 Minutes 36 Seconds
Current price: $1,695.00 (0 bids)
Original National HRO Receiver Manual
Original National HRO Receiver Manual
Ends in 1 Days 14 Hours 27 Minutes 47 Seconds
Current price: $24.95 (1 bid)
National HRO-W HRO-7 SW-3 NC-100 NC-125 Speaker Vi
National HRO-W HRO-7 SW-3 NC-100 NC-125 Speaker Vi
Ends in 2 Days 14 Hours 18 Minutes 41 Seconds
Current price: $1,150.00 (0 bids)
National HRO-500 Instruction Manual -  Premium Car
National HRO-500 Instruction Manual - Premium Car
Ends in 3 Days 17 Hours 31 Minutes 23 Seconds
Current price: $20.45 (6 bids)
National HRO G High Frequency Receiver Coil 180 to
National HRO G High Frequency Receiver Coil 180 to
Ends in 4 Days 7 Hours 18 Minutes 58 Seconds
Current price: $109.55 (0 bids)
National HRO H High Frequency Receiver Coil 100 to
National HRO H High Frequency Receiver Coil 100 to
Ends in 4 Days 7 Hours 20 Minutes 25 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 7 Days 9 Hours 1 Minutes 26 Seconds
Current price: $840.33 (0 bids)
NATIONAL HRO-50R1 & HRO-50T1 MULTIBAND SHORTWA
NATIONAL HRO-50R1 & HRO-50T1 MULTIBAND SHORTWA
Ends in 7 Days 12 Hours 28 Minutes 53 Seconds
Current price: $9.50 (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 7 Days 13 Hours 19 Minutes 30 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 8 Days 3 Hours 26 Minutes 52 Seconds
Current price: $75.00 (0 bids)
Ham radio coil  ’C’ National HRO Gener
Ham radio coil ’C’ National HRO Gener
Ends in 8 Days 9 Hours 3 Minutes 8 Seconds
Current price: $40.00 (0 bids)
National HRO-60 Prototype Receiver Coil Storage Sh
National HRO-60 Prototype Receiver Coil Storage Sh
Ends in 11 Days 3 Hours 51 Minutes 9 Seconds
Current price: $389.95 (0 bids)
National HRO Series Oriignal Manual Only
National HRO Series Oriignal Manual Only
Ends in 17 Days 6 Hours 8 Minutes 9 Seconds
Current price: $22.59 (0 bids)
NEW AMPHENOL 4 (FOUR) PIN MALE PLUG FOR NATIONAL H
NEW AMPHENOL 4 (FOUR) PIN MALE PLUG FOR NATIONAL H
Ends in 17 Days 15 Hours 41 Minutes 50 Seconds
Current price: $19.99 (19 bids)
NEW AMPHENOL 4 (FOUR) PIN PLUG SET FOR NATIONAL HR
NEW AMPHENOL 4 (FOUR) PIN PLUG SET FOR NATIONAL HR
Ends in 17 Days 15 Hours 41 Minutes 53 Seconds
Current price: $26.99 (15 bids)
National HRO-60TS Desktop Speaker for HRO-60 &
National HRO-60TS Desktop Speaker for HRO-60 &
Ends in 18 Days 15 Hours 52 Minutes 5 Seconds
Current price: $98.00 (0 bids)
National HRO-60 Ham Radio User Instruction Manual
National HRO-60 Ham Radio User Instruction Manual
Ends in 19 Days 12 Hours 14 Minutes 31 Seconds
Current price: $14.95 (5 bids)
National HRO Reception Set R-106 Receiver Manual
National HRO Reception Set R-106 Receiver Manual
Ends in 23 Days 4 Hours 26 Minutes 56 Seconds
Current price: $7.99 (2 bids)
National HRO-50-1 HRO50-1 Radio Receiver Manual
National HRO-50-1 HRO50-1 Radio Receiver Manual
Ends in 23 Days 4 Hours 26 Minutes 56 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 23 Days 4 Hours 29 Minutes 29 Seconds
Current price: $10.49 (3 bids)
National HRO-7 HRO7 Radio Receiver Manual Shortwav
National HRO-7 HRO7 Radio Receiver Manual Shortwav
Ends in 23 Days 4 Hours 29 Minutes 30 Seconds
Current price: $10.49 (1 bid)
NATIONAL HRO Communication Receiver Manual
NATIONAL HRO Communication Receiver Manual
Ends in 23 Days 4 Hours 29 Minutes 30 Seconds
Current price: $10.49 (1 bid)
Complete Set of 7 Coils for National HRO RAS-5 CNA
Complete Set of 7 Coils for National HRO RAS-5 CNA
Ends in 23 Days 14 Hours 12 Minutes 30 Seconds
Current price: $550.00 (0 bids)
Manual Reprint For R-106 National HRO Receiver + L
Manual Reprint For R-106 National HRO Receiver + L
Ends in 25 Days 2 Hours 24 Minutes 21 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 26 Days 11 Hours 37 Minutes 9 Seconds
Current price: $2,200.00 (0 bids)
National HRO-60 Receiver Part  Transformer T-12
National HRO-60 Receiver Part Transformer T-12
Ends in 28 Days 7 Hours 41 Minutes 21 Seconds
Current price: $35.00 (0 bids)
NATIONAL HRO 500 { UNTESTED }
NATIONAL HRO 500 { UNTESTED }
Ends in 28 Days 12 Hours 13 Minutes 46 Seconds
Current price: $780.00 (0 bids)
NATIONAL HRO-50 MULTIBAND RADIO RECEIVER PHOTOFACT
NATIONAL HRO-50 MULTIBAND RADIO RECEIVER PHOTOFACT
Ends in 29 Days 8 Hours 3 Minutes 32 Seconds
Current price: $8.50 (0 bids)

Sponsored Links


Custom Search