Here is something interesting for the old radio/electronics fans out there.

These 17 booklets are part of a set of a VINTAGE VOCATIONAL series by the National Radio Institute. These booklets are dated bewtween 1955 and 1959.

Here are the booklets included in this sale:

- Low Frequency Voltage and Power Amplifiers - Low Frequency Amplifiers for Sound and Television Receivers - How R.F. Amplifiers Work in AM, FM and TV Receivers - Wide-Band Amplifiers - Commercial P.A. Systems - Practical Training in TV Servicing - How to Use TV Test Equipment - P.A. Transmission Systems - How Tubes Work in typical Radio Stages - How to Locate Defective Parts - Special P.A. Systems - Acoustics in Public Address Work - How Oscillators Operate in AM, FM, and TV Receivers - How Operating Voltages are Obtained from an A.C. Power Line - Special Power Supplies for Radio Equipment - How Sounds and Scenes are Converted into and Reproduced from Electrical Signals - How Practical Requirements Changed Receiver Circuits

Each of the booklets is approximately 25-35 pages and includes photos, diagrams, advice, and trouble-shooting tips followed by examples. This type of information is from the period and cannot be found in modern day service manuals. Condition is good, but there are some bent and folded corners, writing, marks and wear.

Asking $25 plus actual shipping from Canada for these informational volumes. PayPal preferred. How about $20 plus shipping?