Show humble socket Is important to set attachment should be made of best material contact springs the humble socket used to hold the tube and to provide the menus means ut of in making liking fill electrical contact between the prongs of the tube and tho the rest of the circuit receives less attention from tah elih radio fun fan lhnn it should the socket should be carefully scrutinized for it la is nt at tills point abat the plato and grid wires find and filament leads coine close to each other if the socket la Is mude oi of poor insulating material these currents will leak across the base between the binding posta und become lost the volume and distance of the receiver will surfer suffer nothing less than b akellie should be used po not accept it i socket anade of material that ci ann cnn 11 be easily cut with it a I 1 fe or will leave leams it a wak black wark mark when rubbed across it n piece of white paper material that will do tills this hils lamp banck lit in it which Is a very ery poor insulating su sli substance As a rule this class of material will mill molt melt under the heat of a soldering iron of next importance are arc the contact springs poor contact springs cause a great deal ot of the bolso that Is attributed to static duo due to the short distance avalIn available ble on the inside of a socket and the need for keeping the dimensions 0 the socket t as small a as possible the contact spring pring must necessarily bo be short due to the shortness short nesi of the spring most of the sockets at present are unsatisfactory beube the springs become permanently bent Thle requires leq ulrea frequent bending back into their fornier former bosi position tion so that a good can be obtained with the prongs of the tube one manufacturer lias has solved ached this problem by making tho the spring longer then bending the be tip of vie the spring backwards ards an and d upwards this eliminates s the sit short ol 01 i rt leverno leverage on the spring allowing if I 1 to bend in two places springs are made of phosphor bronze and always keep kaep a firm upward pressure against file lie tube prong the khe socket should also be non micro macro phonic ina in a receiver which w uses erdl birj ury sockets it loud ting ring will be heard beard whenever the set la Is erred adreq often renew 4 typo type of socket which overcome difficulty ni moving oving the hand irom from the tuner dial will all he be sufficient clent to cause the tubes to set up this ring tills this Is caused by the elements of the tubes vibrating to curo this many set feet builders fasten their sockets on oil soft rubber sponges to abao rb vibration the chief object objection loh to this method Is that it if you sou use scions to hold the socket down to the baseboard or use bua bar wiring to the binding posts the socket Is mechanically chani cally connected to the base baseboard basehoar boar d and the lie rubber support does docs not help a great deal in reducing noises A new type of socket has appeared on alip market which oVer overcomes coine s th alili a diffin difficulty atty the socket la Is made of two alecea s of 0 molded bakelite on one prece piece li lb mounted the bindi binding tig posts and land a pad ot of soft spongy rubber Is glued oo on jn in the center the shell of the lie socket contains the contact springs and tills this Is glued to the top of the rubber pad connections are made from the binding posts to the contact cpr springs engg by flexible stranded wire leads underneath the shai slit 11 of the base these wire leads lead are dead ns far as vibrations are concerned anti and the tube Is therefore completely floated the socket can be mounted directly on the back or oc the panel or on the baseboard the soft rubber pail pad allows for the lie ab of side jars ns as well as those M hta direction |