1920s technical books on radio broadcasting National Radio Institute

Lot of six old 1920s vintage technical books on building and operating a radio broadcasting station from the early days of radio. These were all published by the National Radio Institute as part of their - Complete Course in Practical Radio -.

There is also the original paperwork including a partially filled out application for an amateur radio broadcast license.

These are mostly in nice vintage condition, but the first booklet on radio code does have some condition issues. Please see below.

There are:

Organization of a Broadcasting Station - (no copyright date, but probably late 20s) with 30 pages including photos and illustrations;

How to Build a Broadcasting Station - copyright 1927 with 29 pages including lots photos, schematics and illustrations;

How to Manage a Broadcasting Studio - (no copyright date, but probably late 20s) with 22 pages with photos and drawings. This has some worn chewing to the edges of the covers from storage;

Radio and Regulations - copyright 1926 with 28 pages including photos and illustrations; We saw a couple of great photos of vacuum tube broadcasting equipment.

Radio Journalism - (no copyright date, but probably late 20s) with 14 pages.

Code Instruction The Radio Alphabet and How to Use It - copyright 1926 with 20 pages including photos and illustrations. This was published as lessons Nos 1 to 6 of their Complete Course in Practical Radio. It does also have some worm chewing to the back cover and some spots of charring to the spine, edges of the pages, cover and some pages.

Code Instruction Lessons No 7 to 14 - copyright 1927 with 29 pages including lots photos, schematics and illustrations;