Show have efficient ground and get satisha satisfaction ato n the importance of mi an effi efficient clent ground connection can hardly bo be overestimated if there lc ic a resistance to the passage of the high frequency oscillations cil in any part of tile the aerial or ground circuit you find your receiver lacks pep oscillates badly and tunes broadly pep or volume sta around TO ro WOOD J coppen TUBE e jill MIXTURE OF luau SALT CHARCOAL AND I xa COPPER coppe R woop nud I 1 how to bu build lid ground that assures desired results ability and selectivity tire three things every fan likes to have in his set but a large number do not realize what a 11 strong influence a good ground connection has in obtaining results it Is worth while doing tome botne expert experimenting with ground connections and you will probably ind find out some boino very interesting facts one of the simplest and best methods to use in fit testing the efficiency clency of barlous ailo iia ground connections Is to tune in it a station as far distant as pos possible ible then reduce the until you can just licar hear the signal faintly make a note of the dial setting on the rheostat controlling the volume now disconnect the ground and try one of the others you have arranged and compare the volume it if you cannot hear any signal wait a minute and make sure the station has not been fading it if after a short pe lie you still do not hear it a signal then you know that tills this ground la Is not as efficient as the first one in addition to comparing lie volume obtained with each possible ground make a test for selectivity it Is surprising what a difference dine renco a good ground can make to the selectivity try out each of the ground connections it la is possible to arrange until you find one that alv alvs s better results than the others the most common type of ground used Is 18 a connection to a cold water pipe this Is generally 0 K if the pipe is ia thoroughly cleaned and a copper ground clamp used to make contact it la Is generally impossible for the Average man to solder a wire to a coldwater cold water pipe as the water must be turned off and a blow lamp used instead ot of a soldering iron it Is hi a good idea to remove the clamp every tb three ee or oll four months and examine the surface around the clamp to see that there Is no corrosion it you ou are am located where you can reach the ground within a reasonable distance from your xv receiver celver it Is pon poa bible nt at very small expense to install a real ground that wilt will give maximum cy secure a length ot of copper lillee lil po about ono one inch in fit diameter by four feet long and drill a number ot of holes in it fit a wooden plug into oue one end for bior a ground wire uso use a length of solid insulated copper wire about 12 gauge clean tho the top of tp the pipe and about a foot of the ground wire then wrap it around tho the top oi 0 the pipe and solder bolder I 1 A 1 dig a n holo hole about alve feet doe deep and one foot wide secure a bag aag ft f charcoal six or seven pounds of sat salt and a few pounds of copper sulphate smash up the charcoal cliar as aa small as possible then mix charcoal cliar coal salt find copper sulphate together fill in tile earth packing tho the above mixture tightly around the pipe as you 1111 up ho file holu this la Is very important when you have filled up the hole take taka a hose and let water into pipe to the thoroughly in moisten the ground IMs will give you a ground that la Is per cent efficient Phil philadelphia adelphin record ecord Il |