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	<title>骆驼调频 &#187; FM</title>
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	<description>Camel&#039;s FM Blog</description>
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		<title>什么是RDS</title>
		<link>http://www.21say.com/what-is-rds/</link>
		<comments>http://www.21say.com/what-is-rds/#comments</comments>
		<pubDate>Sun, 24 Apr 2011 17:46:21 +0000</pubDate>
		<dc:creator>骆驼</dc:creator>
				<category><![CDATA[FM]]></category>
		<category><![CDATA[Radio]]></category>
		<category><![CDATA[RDS]]></category>

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		<description><![CDATA[RDS是 Radio Data System的缩写，广播数据系统。 RDS是于1984年由欧洲广播联盟（EBU）制定的数据广播系统的欧洲规范，1986年国际无线电咨询委员会（CCIR）通过了有关RDS的643号建议书，1990年正式通过... ]]></description>
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		<title>BA1404小型立体声调频发射机</title>
		<link>http://www.21say.com/ba1404-stereo-fm-transmitter/</link>
		<comments>http://www.21say.com/ba1404-stereo-fm-transmitter/#comments</comments>
		<pubDate>Sat, 27 Nov 2010 13:13:00 +0000</pubDate>
		<dc:creator>骆驼</dc:creator>
				<category><![CDATA[FM]]></category>
		<category><![CDATA[BA1404]]></category>
		<category><![CDATA[FM Transmitter]]></category>

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		<description><![CDATA[本文向大家介绍一种以BA1404为核心的小型立体声调频发射机，因为好多朋友对他非常热衷，向我问及它的资料，所以就把它放了上来。其实关于BA1404应用在许多电子杂志和报刊上多有介绍，算... ]]></description>
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		<item>
		<title>用9014和9018制作微型调频无线话筒</title>
		<link>http://www.21say.com/use-90189014-diy-fm-wireless-microphone/</link>
		<comments>http://www.21say.com/use-90189014-diy-fm-wireless-microphone/#comments</comments>
		<pubDate>Fri, 26 Nov 2010 12:56:00 +0000</pubDate>
		<dc:creator>骆驼</dc:creator>
				<category><![CDATA[FM]]></category>
		<category><![CDATA[C9014]]></category>
		<category><![CDATA[C9018]]></category>
		<category><![CDATA[FM Transmitter]]></category>

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		<description><![CDATA[电路采用电容三点式振荡器，简单可靠，起振容易。BG1组成的放大电路把来自小型电容话筒检测到的微弱声音信号进行放大，达到一定的幅度后送到BG2组成的电容三点式振荡器对BG2产生的载波... ]]></description>
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		<item>
		<title>用9018制作调频话筒教程</title>
		<link>http://www.21say.com/use-9018-production-fm-microphone/</link>
		<comments>http://www.21say.com/use-9018-production-fm-microphone/#comments</comments>
		<pubDate>Thu, 25 Nov 2010 11:21:00 +0000</pubDate>
		<dc:creator>骆驼</dc:creator>
				<category><![CDATA[FM]]></category>
		<category><![CDATA[FM Transmitter]]></category>

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		<description><![CDATA[无线话筒原理分析篇： &#160;&#160;&#160; 下面的就是调频无线话筒的电路图，电路非常简洁，没有多余的器件。高频三极管V1和电容C3、C5、C6组成一个电容三点式的振荡器，对于初学者我们暂时不... ]]></description>
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		</item>
		<item>
		<title>BA1404 5W调频发射机电路</title>
		<link>http://www.21say.com/ba1404-5w-fm-transmitter-circuit/</link>
		<comments>http://www.21say.com/ba1404-5w-fm-transmitter-circuit/#comments</comments>
		<pubDate>Wed, 24 Nov 2010 09:30:00 +0000</pubDate>
		<dc:creator>骆驼</dc:creator>
				<category><![CDATA[FM]]></category>
		<category><![CDATA[BA1404]]></category>
		<category><![CDATA[C1971]]></category>

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		<item>
		<title>4个元件的调频发射机(C9018)</title>
		<link>http://www.21say.com/use-9018-diy-fm-transmitter/</link>
		<comments>http://www.21say.com/use-9018-diy-fm-transmitter/#comments</comments>
		<pubDate>Wed, 24 Nov 2010 03:14:00 +0000</pubDate>
		<dc:creator>骆驼</dc:creator>
				<category><![CDATA[FM]]></category>
		<category><![CDATA[C3358]]></category>
		<category><![CDATA[C9018]]></category>
		<category><![CDATA[FM Transmitter]]></category>

		<guid isPermaLink="false">http://www.21say.com/use-9018-diy-fm-transmitter/</guid>
		<description><![CDATA[电路用了极少的元件，只有4只，就组成了一只微型无线调频话筒，工作频率较稳定，发射距离大于10米，1.5V供电时，电流小于0.5mA，这样节能的话筒还少见，3V供电时距离可达30米。 &#160;&#160;&#1... ]]></description>
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		</item>
		<item>
		<title>用调频接收集成IC TA7335制作调频发射机</title>
		<link>http://www.21say.com/use-ta7335-diy-fm-transmitter/</link>
		<comments>http://www.21say.com/use-ta7335-diy-fm-transmitter/#comments</comments>
		<pubDate>Wed, 24 Nov 2010 03:03:00 +0000</pubDate>
		<dc:creator>骆驼</dc:creator>
				<category><![CDATA[FM]]></category>
		<category><![CDATA[FM Transmitter]]></category>
		<category><![CDATA[Ta7555]]></category>

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		<description><![CDATA[ＴＡ７３３５引脚功能如下：①脚天线信号输入端；②脚接电源；③脚高放输出外接调谐回路；④脚混频器输入端；⑤脚地；⑥脚混频输出；⑦脚内部振荡器外接ＬＣ回路；⑧、⑨脚间内部有... ]]></description>
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		<slash:comments>0</slash:comments>
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		<item>
		<title>用BH1416F和CXA1238M制作高保真无线立体声音箱</title>
		<link>http://www.21say.com/use-bh1416f-and-cxa1238m-diy-wireless-stereo-speakers/</link>
		<comments>http://www.21say.com/use-bh1416f-and-cxa1238m-diy-wireless-stereo-speakers/#comments</comments>
		<pubDate>Tue, 23 Nov 2010 11:12:00 +0000</pubDate>
		<dc:creator>骆驼</dc:creator>
				<category><![CDATA[FM]]></category>
		<category><![CDATA[BH1416F]]></category>
		<category><![CDATA[CXA1238M]]></category>
		<category><![CDATA[FM Transmitter]]></category>

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		<description><![CDATA[发射装置的制作 发射装置采用ROHM公司的单片数字锁相立体声调制芯片BH1416F，该芯片性能卓越，失真仅为0.5%，声道分离度高达40dB，传送的音质可 达专业级别。其引脚功能如下图： 由BH1416F构成... ]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>BH1417 5W发射机电原图</title>
		<link>http://www.21say.com/bh1417-5w-fm-transmitter/</link>
		<comments>http://www.21say.com/bh1417-5w-fm-transmitter/#comments</comments>
		<pubDate>Tue, 23 Nov 2010 09:28:00 +0000</pubDate>
		<dc:creator>骆驼</dc:creator>
				<category><![CDATA[FM]]></category>
		<category><![CDATA[bh1417]]></category>

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		<description><![CDATA[... ]]></description>
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		<slash:comments>0</slash:comments>
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		<item>
		<title>M002A 3公里发射器电路</title>
		<link>http://www.21say.com/m002a-3%e5%85%ac%e9%87%8c%e5%8f%91%e5%b0%84%e5%99%a8%e7%94%b5%e8%b7%af/</link>
		<comments>http://www.21say.com/m002a-3%e5%85%ac%e9%87%8c%e5%8f%91%e5%b0%84%e5%99%a8%e7%94%b5%e8%b7%af/#comments</comments>
		<pubDate>Sun, 21 Nov 2010 16:41:00 +0000</pubDate>
		<dc:creator>骆驼</dc:creator>
				<category><![CDATA[FM]]></category>
		<category><![CDATA[MC002A]]></category>

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		<description><![CDATA[由闽实科技研发的MEC002A微型高效无线传声模块具有体积小，射频输出功率大，声音感应灵敏度高，输出频率相对比较稳定等优点，利用它构成的调频发射机电路结构简单，容易制作，调试方便... ]]></description>
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		<item>
		<title>BA1404/1404F 调频立体声发射电路</title>
		<link>http://www.21say.com/ba14041404f-fm-stereo-transmitter-circuit/</link>
		<comments>http://www.21say.com/ba14041404f-fm-stereo-transmitter-circuit/#comments</comments>
		<pubDate>Sat, 20 Nov 2010 16:34:00 +0000</pubDate>
		<dc:creator>骆驼</dc:creator>
				<category><![CDATA[FM]]></category>
		<category><![CDATA[BA1404]]></category>

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		<description><![CDATA[◆ 功能简介 &#160;&#160;&#160; BA1404/1404F 是日本东洋电具制作所（Rohm Co. Ltd.） 生产的调频立体声发射集成电路。此电路将立体声调制、FM 调制和 RF 放大器等功能集成在一个芯片上。仅仅需要很少... ]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>用BA1404和upc1651制作调制器电路</title>
		<link>http://www.21say.com/ba1404-modulator-circuit/</link>
		<comments>http://www.21say.com/ba1404-modulator-circuit/#comments</comments>
		<pubDate>Sat, 20 Nov 2010 10:28:00 +0000</pubDate>
		<dc:creator>骆驼</dc:creator>
				<category><![CDATA[FM]]></category>
		<category><![CDATA[BA1404]]></category>
		<category><![CDATA[upc1651]]></category>

		<guid isPermaLink="false">http://www.21say.com/ba1404-modulator-circuit/</guid>
		<description><![CDATA[&#160;&#160; BA1404是日本东洋公司的产品，工作电压范围1~3V，该电路是由FM立体声混合器、38KHZ振荡器、FM调制器和高频放大器组成的单片集成电路。 工作原理（见图一）：立体声音频信号经加重... ]]></description>
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		<slash:comments>0</slash:comments>
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		<item>
		<title>18Watt调频功放电路（２ＳＣ１９７０、１９41、１９42）</title>
		<link>http://www.21say.com/18w-fm-amplifier-c1971-1941-1942/</link>
		<comments>http://www.21say.com/18w-fm-amplifier-c1971-1941-1942/#comments</comments>
		<pubDate>Fri, 19 Nov 2010 10:53:00 +0000</pubDate>
		<dc:creator>骆驼</dc:creator>
				<category><![CDATA[FM]]></category>
		<category><![CDATA[c1942]]></category>
		<category><![CDATA[C1971]]></category>

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		<description><![CDATA[装配图 原理... ]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>用2N4401制作1.5V微型无线调频话筒</title>
		<link>http://www.21say.com/2n4401-diy-1-5v-fm-transmitter/</link>
		<comments>http://www.21say.com/2n4401-diy-1-5v-fm-transmitter/#comments</comments>
		<pubDate>Fri, 19 Nov 2010 09:56:00 +0000</pubDate>
		<dc:creator>骆驼</dc:creator>
				<category><![CDATA[FM]]></category>
		<category><![CDATA[2N4401]]></category>

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		<description><![CDATA[&#160; 本文用了12个元件做了一个微型无线调频话筒，工作频率稳定，发射距离在30米左右，6V供电时可达到100米以上。 电路如图所示，BG1与C1、C3组成高频振荡电路。其发射距离与发射管工作电... ]]></description>
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		<slash:comments>0</slash:comments>
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		<item>
		<title>用MEC002M无源电话监听器</title>
		<link>http://www.21say.com/mec002m/</link>
		<comments>http://www.21say.com/mec002m/#comments</comments>
		<pubDate>Thu, 18 Nov 2010 09:50:00 +0000</pubDate>
		<dc:creator>骆驼</dc:creator>
				<category><![CDATA[FM]]></category>
		<category><![CDATA[MEC002M]]></category>

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		<description><![CDATA[装好后调节频率，使频率落在想要的点上，为了保密建议不要使用88-108MHz段的频率。接个软线20-30米的距离没问题，对原来的通话质量也没影响，使用时任意串在一根进线中就能正常使用... ]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>带频率显示的发射机电路原理图</title>
		<link>http://www.21say.com/with-frequency-transmitter-circuit-diagram-shown/</link>
		<comments>http://www.21say.com/with-frequency-transmitter-circuit-diagram-shown/#comments</comments>
		<pubDate>Wed, 17 Nov 2010 09:43:00 +0000</pubDate>
		<dc:creator>骆驼</dc:creator>
				<category><![CDATA[FM]]></category>

		<guid isPermaLink="false">http://www.21say.com/with-frequency-transmitter-circuit-diagram-shown/</guid>
		<description><![CDATA[带频率显示的发射机电路原理... ]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>25W射频放大器-C1946A</title>
		<link>http://www.21say.com/25w-rf-amplifier-c1946a/</link>
		<comments>http://www.21say.com/25w-rf-amplifier-c1946a/#comments</comments>
		<pubDate>Mon, 15 Nov 2010 09:20:00 +0000</pubDate>
		<dc:creator>骆驼</dc:creator>
				<category><![CDATA[FM]]></category>
		<category><![CDATA[c1946a]]></category>

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		<description><![CDATA[原理图 原理图二 装配图 元件面 接口 整... ]]></description>
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		<slash:comments>0</slash:comments>
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		<item>
		<title>以无线话筒为例谈调频发射机的制作</title>
		<link>http://www.21say.com/simple-wireless-microphone/</link>
		<comments>http://www.21say.com/simple-wireless-microphone/#comments</comments>
		<pubDate>Sun, 20 Jun 2010 16:10:00 +0000</pubDate>
		<dc:creator>骆驼</dc:creator>
				<category><![CDATA[FM]]></category>
		<category><![CDATA[C2053]]></category>

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		<description><![CDATA[简易型无线话筒是无线发射机的一个典型，虽然以其“一装即成”的优点博得众多读者的欢心。然而电路中。引起的严重频率飘移将会令我们难以忍受。图1电路采用的晶体振荡器有效地避免了... ]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>简易教学用无线语音放大器的制作</title>
		<link>http://www.21say.com/teaching-with-the-production-of-wireless-voice-mic/</link>
		<comments>http://www.21say.com/teaching-with-the-production-of-wireless-voice-mic/#comments</comments>
		<pubDate>Sat, 19 Jun 2010 16:02:00 +0000</pubDate>
		<dc:creator>骆驼</dc:creator>
				<category><![CDATA[FM]]></category>
		<category><![CDATA[2N3904]]></category>
		<category><![CDATA[CD2822]]></category>
		<category><![CDATA[TDA7088T]]></category>

		<guid isPermaLink="false">http://www.21say.com/teaching-with-the-production-of-wireless-voice-mic/</guid>
		<description><![CDATA[&#160;&#160;&#160; 在学校的教学过程中经常因教室大、学生多而坐在教室后面的学生听不见教师声音。该系统主要针对此问题而设计，也可以作为简单的会议系统使用。其发射机部分体积小、重量... ]]></description>
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		<slash:comments>0</slash:comments>
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		<title>用FF501制作500米远距离无线话筒</title>
		<link>http://www.21say.com/production-of-500-meter-distance-with-ff501-wireless-microphone/</link>
		<comments>http://www.21say.com/production-of-500-meter-distance-with-ff501-wireless-microphone/#comments</comments>
		<pubDate>Thu, 17 Jun 2010 11:23:00 +0000</pubDate>
		<dc:creator>骆驼</dc:creator>
				<category><![CDATA[FM]]></category>
		<category><![CDATA[9014]]></category>
		<category><![CDATA[FF501]]></category>
		<category><![CDATA[FM Transmitter]]></category>

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		<description><![CDATA[&#160;&#160;&#160; 本文介绍的小功率调频发射电路，由于使用了专用的发射管，调制度深，不产生幅度调制，失真小，发送距离远，工作稳定。电路简单易制，只要焊接无误即可工作，电路原理见... ]]></description>
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