Radio Broadcast (Nov. 1925-Apr 1926)

242 RADIO BROADCAST ADVERTISER Smallest Uniform Frequency Condenser Easily Fits Into Present Sets FULL size illustration above shows Samson Condensers are but 2/4" diameter with plates fully extended — half to a third the size of others. You can easily increase the selectivity of your present receiving set having ordinary condensers, and do away with the crowding of station readings — where 85 out of 100 come in below 50 on dial — by using Samson C (Jniform frequency ondensers Samson Uniform Frequency Condensers are built to a tolerance of 1/1,000 inch, silver plated all over for high surface conductivity, and — in addition — have gold plated rotor and stator plates to prevent oxidization. These grounded rotor type instruments have losses lower than the average laboratory standards. This condenser, due to its design does not have the defects caused by either solid metal or dielectric end plates. 500 mmf., $7.00; 350 mmf., #6.75; 250 mmf., #6.50. SAMSON ELECTRIC COMPANY Manufacturers Since 1882 Canton, Mass. Sales Representatives in Thirty Leading American Cities k Why not subscribe to Radio Broadcast? By the year only $4.00; or two years, $6.00, saving $2.40. Send direct to Doubleday, Page & Company, Garden City, New York. ACME CHARGERS Best by Test ^ $050 , 7A Q minus bulb Your dealer can get it for you THE ACME ELECTRIC & MFG. CO. 1410 Hamilton Avenue Cleveland, O. therefore learn how to operate without causing this interference. ADJUSTING A REGENERATIVE SET I F YOU will take the trouble to observe the * rules which follow, you will obtain greater satisfaction and enjoyment from your radio receiving set, and at the same time cause minimum annoyance to your neighbors. (1) Practise on tuning powerful stations first and do not try to pick up weak distant stations until you become expert. (2) Use both hands, one hand for the regeneration control and the other hand for the tuning control. (3) Keep the regeneration control always just below the point of oscillation, your set is then in the most sensitive condition. This is the reason for using your two hands for tuning. (4) If your set then accidentally breaks into oscillation, turn back the regeneration control at once. (5) Do not try to find a station by the whistle. If your set is tuned just below the whistling point, the signals will come in clear and your regeneration control can then be tuned a little further to increase the volume. (6) Do not force regeneration in an attempt to obtain loud speaker volume from a set not designed for the purpose. (7) Do not force regeneration in an attempt to hear stations beyond the range of your set; be content with those you can really hear. The fact that you once heard a distant station on your receiving set is no indication that you can hear this station regularly, for occasionally a radio broadcast from a distant station is received with extra strength due to some freak condition. When you have tried to tune-in to a station in the correct manner for a minute or two and are not able to hear it, do not unduly increase your regeneration and persistently wiggle your dials, for in so doing you may be causing annoyance to some other broadcast listener who would otherwise be able to hear this distant station on his multi-tube set. If you are not satisfied with the range your present receiver is giving you and providing local conditions are satisfactory, the only remedy is a more sensitive receiver or the addition of more tubes to your exisiting set. Don't at your neighbors' expense, try to force your receiver. Besides being unfair to your neighbors, you are also spoiling your own quality. You can accordingly assist in eliminating these whistles by: (a) Learning to operate correctly yourself. (b) Not allowing children, who are not old enough to understand the correct method of operation, to cause interference from your set. (A crystal set causes no interference). THE LICENSE ALL radio receiving sets in Canada are required, by law, to be licensed. Licenses are issued yearly and are required to be renewed on the first of April each year. They may be obtained for one dollar from local Radio Inspectors, many Post Offices, many Radio Dealers, or from the Radio Branch, Department of Marine and Fisheries, Ottawa, Canada. The proceeds of the license fees are used to maintain an inspection staff for the administration of radio and for the improvement of radio conditions in the Dominion. — — i •>•• For the benefit of listeners who are desirous of obtaining this article in circular form, it should be stated that copies may be had, on request, from the nearest Canadian Radio Inspector, or direct from the Radio Branch, Department of Marine and Fisheries, Ottawa, Ontario, Canada. if Tested and approved by Radio Broadcast -jAr