. Amateur radio : how and why of wireless with complete instructions on operation of receiving outfits . slightly staggeredfrom the first tap. This method of taking offtaps is shown quite clearly at U, Fig. in this manner until 7 twisted tapshave been taken off at every 10 turns. Afterthese first 70 turns have been wound on thetube then take off a 6 inch twisted tap forevery succeeding single turn until 10 addi-tional turns have been wound on the winding the last turn of wire anchorthe end by weaving it through two holespunched in the tube much as was done at thestart, lea
. Amateur radio : how and why of wireless with complete instructions on operation of receiving outfits . slightly staggeredfrom the first tap. This method of taking offtaps is shown quite clearly at U, Fig. in this manner until 7 twisted tapshave been taken off at every 10 turns. Afterthese first 70 turns have been wound on thetube then take off a 6 inch twisted tap forevery succeeding single turn until 10 addi-tional turns have been wound on the winding the last turn of wire anchorthe end by weaving it through two holespunched in the tube much as was done at thestart, leaving about 12 inches of wire free forconnecting. It is to be understood that eachof the 18 taps is slightly staggered from theone just above, so that the several taps wTillnot be bunched along one line on the card-board tube. See Fig. 9. It would be ad-visable, after winding the tuner as just de-scribed, to dip the tuner in hot paraffin. Thiswill help to exclude moisture. Upright Panel and Base—Having com-pleted the tuner to this point, set it aside andconstruct the upright panel shown in Fig. 4o AMATEUR RADIO This panel may be a piece of wood approxi-mately Yz inch thick. The position of theseveral holes for the binding posts, switcharms and switch contacts may first be laid outand drilled. The antenna and ground binding postsmay be ordinary }i inch brass bolts of suffi-cient length and supplied with three nuts andtwo washers. The first nut binds the bolt tothe panel, the second nut holds one of theshort pieces of stiff wire, while the third nutholds the antenna or ground wire as the casemay be. The switch arm with knob shownat V, Fig. 9, may be purchased in the as-sembled form or it may be constructed froma thin slice cut from a broom handle and abolt of sufficient length equipped with fournuts and two washers together with a narrowstrip of thin brass somewhat as shown. The switch contacts (W, Fig. 9) may beof the regular type furnished for this purposeor they may be b
Size: 1284px × 1947px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectradio, bookyear1922
