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A Brief History of the National Company, Inc.
By K4KJ - great reading!
DX-ing.com
Shortwave Receivers, National NC-60 and NC-98 pictures and information.
EB5AGV
EB5AGV's National HRO-500 information.
Hampedia
List and pictures of most National radio models. Also some basic technical information
KA7NOC
Pictures of both the NCX-3 and NCX-5 Transceivers.
National HRO Transmitter
From Combat Radio UK.
National HRO-60
More pictures by JA1CEB
National HRO-60
NQ5T has an excellent HRO-60T page here.
National HRO-60 and NC-46
Pictures and technical information.
National HRO-W Receiver
A 1946 radio - with picture and technical details.
National NC-300
A rather low resolution picture.
National NC-98
picture by JA1CEB
National NTX-30 / HRO Sr
A picture of the HRO receiver.
National Radio Co.
Some basic information from "Ominous-valve"
National Radio Company Tour
History and overview of the company and products.
NC-46
National NC-46 Receiver picture and specifications
Radio Bay
About the history and products of the National Radio Company. By WA5VLZ.
WA9WFA
National SW-3 "Thrill Box" receiver from the 1930s, with photos.