Re:Re:Re:Re:Re:[소개] 자전거 펌프로 keying !!!

<DIV class=wrapper> <H1 id=page-title> <DIV id=g_title>Bicycle pump CW key</DIV></H1> <DIV style="CLEAR: both"></DIV> <P class=description> <DIV id=g_description>by OH6DC</DIV> <P></P> <DIV style="CLEAR: both"></DIV></DIV> <DIV id=main-content> <DIV class=wrapper> <DIV class=content-item> <DIV id=g_body> <P> </P> <P>An ordinary bicycle pump - a natural starting point for building a "pump" CW key.</P> <P>(The so called "pump" keys seldom have anything to do with <I>real</I> pumps. This one is an exception.)</P> <P> </P> <P>Choose a party balloon to suit your taste and attach it to the pump nozzle. A short length of garden hose is used to hold the balloon tightly in place without air leaks. </P> <P> </P> <P>Two oversized hose clamps are attached to the pump shaft. The ends of the steel bands are bended so that they come near each other. A paper clip is needed for contacts.</P> <P> </P> <P> </P> <P>"Key up" position: empty balloon - no contact.</P> <P> </P> <P> </P> <P> </P> <P> </P> <P>"Key down" position: air pressure in the balloon makes the contacts touch.</P> <P> </P> <P> </P> <P> </P> <P> </P> <P>Keying cable is connected with alligator clips to the clamps.</P> <P> </P> <P> </P> <P> </P> <P>Pneumatic CW on the air. Two hands are needed. </P> <P>See & hear a video clip:</P><EMBED id=VideoPlayback style="WIDTH: 400px; HEIGHT: 326px" align=middle src=http://video.google.com/googleplayer.swf?docId=-3129887595749713370&hl=en type=application/x-shockwave-flash quality="best" bgcolor="#ffffff" scale="noScale" salign="TL" flashvars="playerMode=embedded" allowNetworking='internal' allowScriptAccess='sameDomain'> <P> </P></DIV></DIV> <DIV style="CLEAR: both"></DIV></DIV></DIV> <DIV id=sidebar> <DIV class=wrapper> <DIV class=links> <DIV class=wrapper> <DIV id=g_sidebar> <P class="" style="CLEAR: both; BORDER-RIGHT: medium none; BORDER-TOP: medium none; BORDER-LEFT: medium none; BORDER-BOTTOM: medium none; TEXT-ALIGN: center"><A style="BORDER-TOP-WIDTH: 0px; CLEAR: left; BORDER-LEFT-WIDTH: 0px; FLOAT: left; BORDER-BOTTOM-WIDTH: 0px; MARGIN-BOTTOM: 1em; MARGIN-RIGHT: 1em; BACKGROUND-COLOR: transparent; BORDER-RIGHT-WIDTH: 0px; TEXT-DECORATION: none" href="http://oh6dc.cw.googlepages.com/pumppu1.jpg/pumppu1-full.jpg" imageanchor="1"> <IMG style="BORDER-TOP-WIDTH: 0px; BORDER-LEFT-WIDTH: 0px; BORDER-BOTTOM-WIDTH: 0px; BORDER-RIGHT-WIDTH: 0px" tabIndex=0 src="https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Foh6dc.cw.googlepages.com%2Fpumppu1.jpg%2Fpumppu1-medium.jpg" closure="" hashcode="" galleryimg="no"></A><A style="BORDER-TOP-WIDTH: 0px; CLEAR: left; BORDER-LEFT-WIDTH: 0px; FLOAT: left; BORDER-BOTTOM-WIDTH: 0px; MARGIN-BOTTOM: 1em; MARGIN-RIGHT: 1em; BACKGROUND-COLOR: transparent; BORDER-RIGHT-WIDTH: 0px; TEXT-DECORATION: none" href="http://oh6dc.cw.googlepages.com/pumppu3.jpg/pumppu3-full.jpg" imageanchor="1"> <IMG style="BORDER-TOP-WIDTH: 0px; BORDER-LEFT-WIDTH: 0px; BORDER-BOTTOM-WIDTH: 0px; BORDER-RIGHT-WIDTH: 0px" tabIndex=0 src="https://img1.daumcdn.net/relay/cafe/original/?fname=http%3A%2F%2Foh6dc.cw.googlepages.com%2Fpumppu3.jpg%2Fpumppu3-medium.jpg" closure="" hashcode="" galleryimg="no"></A></P> <P class="" style="CLEAR: both; BORDER-RIGHT: medium none; BORDER-TOP: medium none; BORDER-LEFT: medium none; BORDER-BOTTOM: medium none; 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