. QST . ived. Dont overcouple the trans-mitter to the antenna or tuner! Beginners some-times get the idea that the more turns thereare in a link, the more will be coupled tothe antenna. As a result, we have heard of linksof ten and twenty and even thirty turns. Re-member that such an arrangement is not onlya link but a very effective capacitive-couplingdevice — something harmonics love like micelove cheese. Any two pieces of metal separatedby an insulator form a capacitor of sorts, whetherthese be flat plates (as in an air variable) orrolled foil (as in a paper capacitor) or in coilform.
. QST . ived. Dont overcouple the trans-mitter to the antenna or tuner! Beginners some-times get the idea that the more turns thereare in a link, the more will be coupled tothe antenna. As a result, we have heard of linksof ten and twenty and even thirty turns. Re-member that such an arrangement is not onlya link but a very effective capacitive-couplingdevice — something harmonics love like micelove cheese. Any two pieces of metal separatedby an insulator form a capacitor of sorts, whetherthese be flat plates (as in an air variable) orrolled foil (as in a paper capacitor) or in coilform. Notice commercially-made coils for the40- and 80-meter amateur bands. Usually thesehave only two turns, or three at the most.* Measures which >ou have probably alreadytaken in connection with TVI will also help withyour low-frequency harmgnics. For example: AFaraday shield in the final tank link, coax fromthis link to the shielded antenna tuner, and ashielded link in the tuner unit itself, grounding. — WARMOMICSGO FOR nr of center taps of coils in Imlanced systems,and the like, are all l)eneficial. A low-pass filterwill not have any effect whatever on low-fre-quency harmonics, since it is usually designed topass everything below 30 Mc. There are always a few special cases, and itmay be that your rig seems to radiate unwantedsignals despite everything that you have doneto it. This is a good place for a huddle at thelocal club, as two heads are usually better thanone at this point. If it is a manufactured item,write telling the maker exactly what happens,and follow his suggestions carefully. If your (Continued on page 126) August 1955 43 The Buffalo Area RACES Organization Getting Organized for Civil Defense Service in Erie County, N. Y. BY C. E. JOHNSON, JR.,* W2PPY • In pa!i<t (JSTs Me have given you muchinfurniation and advice on how to getset up for RACES. This article will tellyou ahoul Erie Countys working organi-zation, how it got that way and why. ERIE COUNTY,
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectradio, bookyear1915
