This book provides an introduction to the design of a variety of telescopes, mounts, and drives suitable for the home-constructor. Projects include instruments that range from a shoestring budget to specialist devices that are not commercially available. The skill level of each project is indicated and advice is provided as to what is sensible to construct, given what is commercially available. Hints and tips are included, as well as listings of reputable mail order sources of materials and components.A value of 0.1 p.F produces the correct phase change for a Crouzet motor, but may need changing for other types. Some confusion may arise over the use of a reversible a.c. motor. ... Pressing PB3 or 4 now supplies a positive and negative 12 V output that has reversed polarity depending on which button is pressed.
|Title||:||Amateur Telescope Making|
|Publisher||:||Springer Science & Business Media - 2012-12-06|