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	<title>Vintage Tube Amp &#187; duty</title>
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		<title>Vintage Altec Tm-552a Power Transformer 6.3v Ct 15.5a Heavy Duty Tube Amp Iron</title>
		<link>https://myvintagetubeamp.com/2026/08/25/vintage-altec-tm-552a-power-transformer-6-3v-ct-15-5a-heavy-duty-tube-amp-iron/</link>
		<comments>https://myvintagetubeamp.com/2026/08/25/vintage-altec-tm-552a-power-transformer-6-3v-ct-15-5a-heavy-duty-tube-amp-iron/#comments</comments>
		<pubDate>Tue, 25 Aug 2026 23:12:59 +0000</pubDate>
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				<category><![CDATA[vintage]]></category>
		<category><![CDATA[155a]]></category>
		<category><![CDATA[altec]]></category>
		<category><![CDATA[duty]]></category>
		<category><![CDATA[heavy]]></category>
		<category><![CDATA[iron]]></category>
		<category><![CDATA[power]]></category>
		<category><![CDATA[tm-552a]]></category>
		<category><![CDATA[transformer]]></category>
		<category><![CDATA[tube]]></category>

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		<description><![CDATA[Vintage Altec Tm-552a Power Transformer 6.3v Ct 15.5a Heavy Duty Tube Amp IronFOR YOUR CONDERATION IS A. WEIGHT: 10 LBS 8 OZ. BENCH TESTED WITH MULTIMETER. CONTINUITY CHECKS OUT ACROSS ALL WINDINGS AND PRIMARY/SECONDARY VOLTAGES READ STRONG AND STABLE UNDER NO-LOAD TESTING. ALL LEADS IN GREAT SHAPE. SOME SCRATCHES ON CASING AS PICTURED. Built to [&#8230;]]]></description>
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<div> <img class="qag3g3f9go6S5IWg2e8e6g4g1e80Vg1e8e7f2g1e8e6g3f9f8gfre4fSVe6f8f605I7dsgaS68e604I58e904I58e904c4IZ06ftg4gI6I6I64gd09f2fy62g0a04I5905SUg4eS4I58e90UgI75g9g8g8g907o74g7g707y72g6gy5o4IZ06c4IZe6e5fdlg8076076f607o7I7S77077f6076g607S7o72f6077g2afy5o4d05fdl07o7I7I72g7g7g7g8073g7go4I58e904I5905S4I590Xe2e5fdl076077077077076g2a04IZe904IZ06e4I58e904I5905SUe5fdlfc5o4IZ06a5g8076077g9076go5o4IZ06d0904I58eI4I58e9f7076go5o4IZ060ae5fdl076g2e5ae904djafy4I58e9095fdlg9g8g707607o5S5S64007" src="https://myvintagetubeamp.com/wp-content/uploads/Vintage_Altec_Tm_552a_Power_Transformer_6_3v_Ct_15_5a_Heavy_Duty_Tube_Amp_Iron_07_sph.jpg" title="Vintage Altec Tm-552a Power Transformer 6.3v Ct 15.5a Heavy Duty Tube Amp Iron" alt="Vintage Altec Tm-552a Power Transformer 6.3v Ct 15.5a Heavy Duty Tube Amp Iron"/></div>

	

 
	<br/>  		 <div class="accordion vertical"><input type="checkbox" name="vintage altec tm 552a power transformer 6 3v ct 15 5a heavy duty tube amp iron" id="vintage_altec_tm_552a_power_transformer_6_3v_ct_15_5a_heavy_duty_tube_amp_iron" /><label for="vintage_altec_tm_552a_power_transformer_6_3v_ct_15_5a_heavy_duty_tube_amp_iron">Vintage Altec Tm-552a Power Transformer 6.3v Ct 15.5a Heavy Duty Tube Amp Iron</label><div class="accordion-content">FOR YOUR CONDERATION IS A. WEIGHT: 10 LBS 8 OZ. BENCH TESTED WITH MULTIMETER. CONTINUITY CHECKS OUT ACROSS ALL WINDINGS AND PRIMARY/SECONDARY VOLTAGES READ STRONG AND STABLE UNDER NO-LOAD TESTING. ALL LEADS IN GREAT SHAPE. SOME SCRATCHES ON CASING AS PICTURED. Built to power large commercial/theater tube equipment or massive multi-channel broadcast setups. To put it into perspective, a standard vintage guitar amplifier or hi-fi stereo amplifier usually only requires a 6.3V tap rated between 2A and 5A. A transformer pulling 15.5A + 2.5A is massive &#8220;industrial-grade iron&#8221; designed to light up the filaments of an entire rack of power tubes simultaneously. It was used to supply heater current for. Large Theater &#038; Cinema Amplifiers: Legacy Altec/Western Electric style multi-tube sound systems designed for movie theaters (where multiple large power tubes like 807s, 6L6s, or KT88s ran concurrently). Broadcast/Radio Transmitter Gear: Station modulation equipment and multi-stage studio amplifiers. Massive Industrial Power Supplies: Centralized laboratory or theater sound system rack power bays. WILL BE PACKAGED WITH EXTREME CARE TO SURVIVE TRANSIT. ANY QUESTIONS, PLEASE ASK.   </div>

 
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