The following suggestions and instructions adapted from the Rules and Regulations governing Naval Wireless Telegraph Stations may be of value and service to many in operating their instruments.
"The operating room should be well lighted and free from vibration. The room should have a well insulated entrance for the aerial and should be fitted with an operating table about two and one-half feet wide, not less than seven feet long and of a convenient height for working the sending key.
The table should be of dry, well-seasoned wood and the instruments should be mounted on the table at safe sparking distances from each other.
"The connections should all be as direct as possible and well insulated. High potential leads should be kept away from low potential leads and where they cross it should be at nearly right angles.
"Sending key contacts must be kept clean and flat with surfaces parallel to each other.
"All sliding contacts, especially in the receiving tuning coils, should be kept clean and bright and free from foreign matter. A sending set working at low power with all connections good, closed and open circuits in resonance, no sparking from edge of condenser, jar or plates, no glow from aerial and no sparking to rigging, is utilizing its power much more efficiently than the same set pushed to the limit with high resistance connections, sparking at all points and out of resonance."
Fig. 147. Marconi Station at Siasconset, Mass.