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	<title>Electronic Circuits and Diagram-Electronics Projects and Design &#187; Ham Radio Circuits</title>
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		<title>CW Practice oscillator</title>
		<link>http://www.circuitstoday.com/cw-practice-oscillator</link>
		<comments>http://www.circuitstoday.com/cw-practice-oscillator#comments</comments>
		<pubDate>Tue, 12 Aug 2008 12:31:42 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Ham Radio Circuits]]></category>

		<guid isPermaLink="false">http://www.circuitstoday.com/?p=416</guid>
		<description><![CDATA[Description. A circuit diagram that can be used for the generation of CW Morse code is shown here.This circuit can be very useful those who would like practice Ham Radio.The circuit is nothing but an astable multivibrator based on NE 555.The frequency of oscillations of the circuit depends on the components R1,R2 &#38; C1.The circuit can be powered from a 9V PP3 battery. Circuit diagram with Parts list. Notes.  The POT R2 can be used for frequency adjustments. POT R3 can be used for volume adjustments. The switch S1 can  be a Morse code key.]]></description>
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		<slash:comments>3</slash:comments>
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		<title>QRP antenna tuner circuit</title>
		<link>http://www.circuitstoday.com/qrp-antenna-tuner-circuit</link>
		<comments>http://www.circuitstoday.com/qrp-antenna-tuner-circuit#comments</comments>
		<pubDate>Fri, 06 Jun 2008 16:50:48 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Ham Radio Circuits]]></category>
		<category><![CDATA[Radio Circuits]]></category>

		<guid isPermaLink="false">http://www.circuitstoday.com/?p=315</guid>
		<description><![CDATA[ Description. Low power ( 3 to 30 MHz)  transmitters constructed by hams are generally called QRP&#8217;s. For such transmitters a well tuned antenna is a must.If the impedance is not properly matched there will be a little or no output.But if properly matched there will be great results.A circuit for matching the antenna properly with the transmitter id given below. The output of the transmitter is given to the input of the tuner( connector BNC1). The output of the tuner(connector BNC2) must be connected to antenna.Then adjust the L1 and C1 to obtain the maximum transmission power.The transmission power can...]]></description>
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		<slash:comments>2</slash:comments>
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