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Chameleon Knowledge Base · The Complete Online HF Antenna Handbook

CHA URT1 MB Engineering and System Behavior

URT1-MB is a mount equipped with a rod and 3/8-24 interface. It is designed to hold CHA URT1; it is not a feed/matching unit, tuner, transformer, or complete antenna. The remote tuner and complete electrical path remain separate required components.

Product Installation Guides CHA URT1 MB Reviewed 2026-07-14
Start with the operating decision: URT1-MB is a mount equipped with a rod and 3/8-24 interface. It is designed to hold CHA URT1; it is not a feed/matching unit, tuner, transformer, or complete antenna. The remote tuner and complete electrical path remain separate required components.

How the system behaves

URT1-MB can make a compact feed-point-tuned vertical or TDL installation possible, but every added whip, extension, or hub increases leverage and introduces electrical choices. A 3/8-24 fit is not an approval for an unlisted configuration.

The boundary that prevents mistakes

Tuning belongs to the installed CHA URT1 and complete antenna, not to URT1-MB. Begin at low power only after the mount, tuner, radiator, return, and direct control/feed path match a documented application.

Use this field sequence

Attach it to the supported mount or structure, carry tuner and cable loads through the intended mechanical path, install the exact documented radiator, return, isolation, feed, and control parts, then inspect leverage and clearance before energizing the tuner.

Source boundary

CHA URT1 User Guide 260524, Applications Guide 260612, and current product record. Use the exact current configuration, components, feed, support, geometry, power, and safety limits; mechanical fit does not establish compatibility.

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