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Bellringers handy tool. Good choice as a present for any bell ringer. Draw a line for any method. Just keep this pad with your diagrams book and whenever you need to check out a method you will have this pad of dots to help you draw the line. This pad is ideal for doubles, minor and triples. Helping a fellow ringer? Then use this pad full of dots to explain where their bell passes the treble. If you are trying to develop advanced bell ringing techniques then this tool will make life just that bit easier for you. Did you know, a bell ringer is called a campanologist but generally a Church bell ringer prefers to be known as a bellringer.

This report investigates the suitability of a number of broadcast band transmitters of opportunity for a passive radar. Specifically, this report reviews the design of active radar waveforms, measures emissions for representative transmitters of opportunity, and assesses the suitability of these signals for various types of radar observation. This report shows that it is indeed possible to construct the suggested passive radar, although performance is limited and depends largely on other parameters, such as receiver bandwidth, antenna pattern and observation time.