A Brief History of the National Company, Inc.
- By K4KJ - great reading!
- http://www.qsl.net/jms/bio_rem/bhnc.html

NC-46
- National NC-46 Receiver picture and specifications
- http://www.io.com/~nielw/nat_list/nc46.htm

National NC-300
- A rather low resolution picture.
- http://www.montagar.com/~patj/salnc32.jpg

Hampedia
- List and pictures of most National radio models. Also some basic technical information
- http://www.aade.com/hampedia/national/natl1.htm

National HRO-60 and NC-46
- Pictures and technical information.
- http://www.dxing.com/rx/hro060.htm

DX-ing.com
- Shortwave Receivers, National NC-60 and NC-98 pictures and information.
- http://www.dxing.com/rx/nc060.htm

National Radio Co.
- Some basic information from "Ominous-valve"
- http://www.ominous-valve.com/ba-mfrs.html#NATIONAL

National NTX-30 / HRO Sr
- A picture of the HRO receiver.
- http://www.io.com/~nielw/nat_tour/rack.htm

National Radio Company Tour
- History and overview of the company and products.
- http://www.io.com/~nielw/nat_tour/nat_tour.htm

KA7NOC
- Pictures of both the NCX-3 and NCX-5 Transceivers.
- http://www.magiclink.com/web/shurst/BA00.htm

Radio Bay
- About the history and products of the National Radio Company. By WA5VLZ.
- http://www.io.com/~nielw/index.htm

WA9WFA
- National SW-3 "Thrill Box" receiver from the 1930s, with photos.
- http://www.qsl.net/wa9wfa