Show test buzzer lor for crystal detector set those who he have crystal detectors when asking the usual question bow eun con I 1 best improve my sety are usually immediately told to get a vacuum tube detector outfit tills this Is out of the question for tunny of the crystal set owners since a six volt battery costs in the neighborhood of 20 and with the 5 V T and other accessories the price of the unassembled parts comes to at least 39 30 in order to get the best beat possible point on crystal it is absolutely net aw eskary to use a test buzzer any buzzer or bell which depends on battery current for or operation will do di although the higher pitched buzzers buzzerd told cold for or radio work give a much better and evener tone the dry cells a little wire and a push button or switch for or starting and stopping tile buzzer are the other things necessary in order that the buzzer may be heard beard only in the bead set it Is necessary 62 ry that it b be muffled in some way this can be done by locating it in the next room or basement or by wrapping DP it in a cloth and placing it in a b box 0 R run un 01 0 i 1 tac wires to the buzzer r rom 0 ta th the 0 P pub sh button located on the connect the two dry cells in so s ries with one side ilde of the th link llo and aa thiv n test teat buzzer to Is ready tor for a trial to adjust the detector close the coo tact through the push button or switch this will start the crystal now try various spots OU on the crystal with the th end of the eat cat whisker or wire spring until the buzzer can be heard beard la in the th phone if the buzzer cannot be heard beard at all after a minute inte search it may be necessary to connect one aide of the buzzer line to the ground lend lead on the tha set do not be satisfied with just hearing the buzzer there tire are many poor poop spots on a crystal but only a lew few really good ones and it la Is surprising how sensitive a 8 crystal can be when the hie very best beat adjustment li Is made cinde A good piece of galena Is our preference this crystal requires a very tine fine clean point with light pressure therefore gu galena lella it if it Is to be used a very light spring contact wire Is essary the ead of the wire which touches the crystal can be cut cat with a knife or pliers at an angle so BO that this to point Is sharp the big advantage of the teet teat buzzer over the outside signals Is that it III II always avul available lable and Is constant in strength |