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Jumbo Godfrey or as I used to address as Mr. Godfrey was a electronics - radio tutor at Auckland Technical Institute (ATI, or now called Auckland University of Technology AUT) and had the call sign ZL1HV
I purchased this manual for revision it cost $30 to help me get closer to 99.9%, it was not until it arrived in the post I realized, it looked a bit like my old notes I made during my apprenticeship night classes and was written by my tutor, I passed 58 out of 60, failing on the bandwidth of the two meter band, and what I thought was a bad worded question. The use of a BFO (Beat Frequency Oscillator) in a SSB (Single Side Band) radio, without the BFO the sound is audible, it is just you can not make any sense from the sound, and often refereed to as "Donald Duck" talk.
However this book (issue 2, (mid 2012)) does not include the radio regulations needed to pass the exam.
I look forward to NZART putting out a "Advance Radio Training Manual" to help attract new and younger people into amateur radio. For example it was not until I got my call sign I realized just how important it is to have a SWR ( Standing Wave Ratio) meter, by keeping your SWR as close to 1:1 ratio as possible you are less likely to interfere with other radio services.
Eric Richards ZL1ERI