tag:blogger.com,1999:blog-34336859775860103172011-11-27T16:23:51.890-08:00Tv antenna amplifiers circuits, tips, reviews and how to choose the perfect antenna amplifier for you tv set.Wellnesshttp://www.blogger.com/profile/12265979782276528995noreply@blogger.comBlogger11100tag:blogger.com,1999:blog-3433685977586010317.post-6082972449607776762009-05-20T08:27:00.000-07:002009-05-20T09:25:36.969-07:00This UHF TV antenna amplifier circuit is used to amplify TV signals in UHF range. It uses a low-noise transistor and gives 10 to 15 <acronym title="Decibel">dB</acronym> amplification in the frequency range from 400 <acronym title="Megahertz">MHz</acronym> to 850 <acronym title="Megahertz">MHz</acronym>.<br /><br />The 2SC3358 transistor must be shielded from the input components and in constructing this circuit, the wirings must be as short as possible. For best results, the tv coaxial cable must be directly soldered to the PCB. The tv amplifier circuit should be installed near the antenna and housed in a water proofed case.<br /><br />The power supply for this uhf antenna amplifier is fed through the cable by using a choke coil. To prevent the <acronym title="Direct Current">DC</acronym> voltage from getting into the TV set, the coaxial cable must be coupled to the set through a small value capacitor.<br /><br />To align the amplifier, just adjust P1 until the best reception is achieved. It means a collector current between 5 and 15 <acronym title="Mili Ampers">mA</acronym>.<br /><h2>TV antenna amplifier circuit diagram</h2><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://2.bp.blogspot.com/_rWLxsSqR4-g/ShQiDDVrFrI/AAAAAAAAABE/d_4aZ71_1fE/s1600-h/tv-antenna-amplifier.gif"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 320px; height: 259px;" src="http://2.bp.blogspot.com/_rWLxsSqR4-g/ShQiDDVrFrI/AAAAAAAAABE/d_4aZ71_1fE/s320/tv-antenna-amplifier.gif" alt="" id="BLOGGER_PHOTO_ID_5337928894172042930" border="0" /></a><br /><h3>Tv amplifier PCB Layout</h3><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://3.bp.blogspot.com/_rWLxsSqR4-g/ShQil8r5JoI/AAAAAAAAABM/Hang9nTmHpI/s1600-h/tv-amplifier-pcb-layout.gif"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 300px; height: 193px;" src="http://3.bp.blogspot.com/_rWLxsSqR4-g/ShQil8r5JoI/AAAAAAAAABM/Hang9nTmHpI/s400/tv-amplifier-pcb-layout.gif" alt="" id="BLOGGER_PHOTO_ID_5337929493681612418" border="0" /></a><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="http://3.bp.blogspot.com/_rWLxsSqR4-g/ShQirWGH-lI/AAAAAAAAABU/tLoHJTJyaek/s1600-h/uhf-antenna-amplifier-parts-placement.gif"><img style="margin: 0px auto 10px; display: block; text-align: center; cursor: pointer; width: 400px; height: 198px;" src="http://3.bp.blogspot.com/_rWLxsSqR4-g/ShQirWGH-lI/AAAAAAAAABU/tLoHJTJyaek/s400/uhf-antenna-amplifier-parts-placement.gif" alt="" id="BLOGGER_PHOTO_ID_5337929586401868370" border="0" /></a><div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/3433685977586010317-608297244960777676?l=tvantennaamplifier.blogspot.com' alt='' /></div>Wellnesshttp://www.blogger.com/profile/12265979782276528995noreply@blogger.com0