. QST . ^ is left oj^en. With the 115-volt line connectedto the rig. Si is turned on and the GX5 filamenlsare allowed to warm up for a minute or so. Then(82 is turned on and the 5Y;5 allowed to warm uj)for another few miimtes. The power supply isswitched to the low-voltage output. The key isthen closed and the plate capacitor tuned forresonaiico as indicated by minimum brilliance in (Conliiiucd on jtnuc IJO).

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectradio, bookyear1915