<p>The Yaesu GC-038 is a genuine lower mast clamp assembly engineered specifically to mount Yaesu antenna rotators directly onto a support pipe, mast, or pole without requiring a flat tower-shelf mounting plate. By attaching directly to the bottom mounting points of the rotator base housing, it provides the secure dual-jaw gripping mechanism necessary to support the rotator and antenna assembly safely in pole-mounted installations.</p>
<p>Cast from a high-tensile, corrosion-resistant alloy designed to endure prolonged outdoor weathering and heavy vibration, it features grooved internal gripping surfaces that deliver outstanding anti-twist retention against dynamic wind loads. It is an essential mounting accessory for pole-type configurations across virtually the entire Yaesu rotator lineup, including the G-450, G-650, G-800, G-1000, and G-5500 series (excluding the heavy-duty G-2800 series, which requires the GC-048 clamp).</p>
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<h2>Key Advantages</h2>
<ul>
<li><strong>Versatile Pole Mounting:</strong> Allows rotators to be installed on tubular masts and poles without requiring a dedicated lattice tower.</li>
<li><strong>Genuine Yaesu Precision:</strong> Engineered for an exact mechanical fit with the standard 4-point bottom mounting pattern of Yaesu rotators.</li>
<li><strong>High-Strength Cast Alloy:</strong> Robust structural design that resists bending moments, mechanical fatigue, and outdoor exposure.</li>
<li><strong>Anti-Twist Clamping Surface:</strong> Ribbed jaw profile prevents rotational slippage caused by antenna inertia and high wind gusts.</li>
<li><strong>Broad Model Compatibility:</strong> Designed for Yaesu G-450, G-650, G-800, G-1000, and G-5500 rotator series.</li>
</ul>
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<h2>Recommended Applications</h2>
<h3>Tubular Roof and Guyed Masts</h3>
<p>Ideal for mounting an antenna rotator atop a guyed tubular mast or heavy-duty roof pipe where a lattice tower cannot be installed.</p>
<h3>Satellite and Azimuth-Elevation Arrays</h3>
<p>Enables combined azimuth-elevation rotator packages (such as the Yaesu G-5500) to sit securely on top of elevating masts.</p>
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<h2>Technical Specifications</h2>
<table style=”width:100%; border-collapse:collapse; border:1px solid #ddd;”>
<thead>
<tr>
<th style=”padding:8px; border:1px solid #ddd; text-align:left;”>Parameter</th>
<th style=”padding:8px; border:1px solid #ddd; text-align:left;”>Specification</th>
</tr>
</thead>
<tbody>
<tr>
<td style=”padding:8px; border:1px solid #ddd;”><strong>Brand</strong></td>
<td style=”padding:8px; border:1px solid #ddd;”>Yaesu</td>
</tr>
<tr>
<td style=”padding:8px; border:1px solid #ddd;”><strong>Model</strong></td>
<td style=”padding:8px; border:1px solid #ddd;”>GC-038</td>
</tr>
<tr>
<td style=”padding:8px; border:1px solid #ddd;”><strong>Reference (SKU) / EAN</strong></td>
<td style=”padding:8px; border:1px solid #ddd;”>GC038 / 4909959171358</td>
</tr>
<tr>
<td style=”padding:8px; border:1px solid #ddd;”><strong>Accessory Type</strong></td>
<td style=”padding:8px; border:1px solid #ddd;”>Lower Mast Clamp for pole-mounting antenna rotators</td>
</tr>
<tr>
<td style=”padding:8px; border:1px solid #ddd;”><strong>Compatible Mast Diameter</strong></td>
<td style=”padding:8px; border:1px solid #ddd;”>Masts and support pipes up to Ø 38 mm to 63 mm (depending on rotator model)</td>
</tr>
<tr>
<td style=”padding:8px; border:1px solid #ddd;”><strong>Compatible Rotators</strong></td>
<td style=”padding:8px; border:1px solid #ddd;”>Yaesu G-450, G-650, G-800DXA/DXC, G-1000DXA/DXC, G-5500 (all models except G-2800DXA/DXC)</td>
</tr>
<tr>
<td style=”padding:8px; border:1px solid #ddd;”><strong>Material</strong></td>
<td style=”padding:8px; border:1px solid #ddd;”>Corrosion-resistant high-strength die-cast alloy</td>
</tr>
</tbody>
</table>
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<h2>Key Highlights</h2>
<ul>
<li>Official Yaesu accessory for converting flat-base rotators into pole-mounted units.</li>
<li>Two-piece clamshell jaw configuration for balanced, heavy-duty gripping force.</li>
<li>Wide cross-compatibility across amateur HF, VHF/UHF, and satellite rotator models.</li>
<li>Simplifies antenna installations by eliminating the need for custom fabrication or tower plates.</li>
</ul>
<hr />
<h2>Package Contents</h2>
<ul>
<li>1x Yaesu GC-038 Mast Clamp Assembly (pair of clamping halves).</li>
<li>1x Complete mounting hardware set (fasteners, bolts, and lock washers).</li>
</ul>
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<h2>Frequently Asked Questions</h2>
<h3>What is the difference between the GC-038 and the clamps included with the rotator?</h3>
<p>The clamps included in the box with a new Yaesu rotator are the upper clamps, which grip the mast holding the antenna array. The GC-038 is an optional lower clamp that bolts to the underside of the rotator body, allowing the entire drive unit to be clamped onto a lower support pipe instead of resting on a flat tower shelf.</p>
<h3>Can this clamp be used on the Yaesu G-2800DXC?</h3>
<p>No. The heavy-duty G-2800 series has a larger footprint and handles much higher torsional loads; it requires the larger Yaesu GC-048 mast clamp.</p>
