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Spooltenna Stealth Ultra 40-10M End Fed Half Wave Antennas
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Spooltenna Stealth Ultra 40-10M End Fed Half Wave Antennas are a 40-10M end fed half wave antenna in an ultra-compact form that is small enough to fit right into yo
Spooltenna Stealth Ultra 40-10M End Fed Half Wave Antennas are a 40-10M end fed half wave antenna in an ultra-compact form that is small enough to fit right into your pocket. Optimized for size and weight without compromising performance, it is ideal for POTA, SOTA, backpacking, and travel.
The Stealth Ultra-EFHW4010 all-black antenna is for hams who want to operate under the radar or who need to operate discreetly in HOA-restricted environments. Stealth appearance, full performance.
No antenna tuner required.
What's in the Box:
SPOOLTENNA ULTRA-EFHW4010
Field Testing Report for that serial number
QRP cod
The Stealth Ultra-EFHW4010 all-black antenna is for hams who want to operate under the radar or who need to operate discreetly in HOA-restricted environments. Stealth appearance, full performance.
No antenna tuner required.
What's in the Box:
SPOOLTENNA ULTRA-EFHW4010
Field Testing Report for that serial number
QRP cod
Spooltenna Stealth Ultra 40-10M End Fed Half Wave Antennas are a 40-10M end fed half wave antenna in an ultra-compact form that is small enough to fit right into your pocket. Optimized for size and weight without compromising performance, it is ideal for POTA, SOTA, backpacking, and travel.
The Stealth Ultra-EFHW4010 all-black antenna is for hams who want to operate under the radar or who need to operate discreetly in HOA-restricted environments. Stealth appearance, full performance.
No antenna tuner required.
What's in the Box:
SPOOLTENNA ULTRA-EFHW4010
Field Testing Report for that serial number
QRP code for Quick Start Guide and Owners' Manual (available for download on our website)
Features:
Center hole - 8mm (approximately 5/16") for quick deployment using a standard screwdriver as an axle (screwdriver not provided)
Low-profile winding knob for easy set up and tear down
Thermal venting on back for high-duty cycle operation
4mm banana jack for quick connection/disconnection of radiating element
8mm mounting holes on face and back side of the product for mounting or hanging flexibility
Right-angle BNC connector to align with feedline direction
Matching circuit captive within the barrel of the spool to protect circuit components
Strain relief on both ends of the radiating element
Supplied with BongoTies® tie for retaining wire on the spool
Designed for use with lightweight coax like RG-174 coax with 5 integrated ferrites to choke return RF (available as optional accessory)
Additional Features & Specifications:
Frequency Range:
7.0 - 7.3 MHz (40M)
14.1 - 14.35 MHz (20M)
21.0 – 21.45 MHz (15M)
28.0 – 29.7 MHz (10M)
Power: 100W SSB, 50W CW & digital
Dimensions:
Diameter: 3.0 in.(76mm)
Thickness: ~ 0.98 in. (25mm) (minus the BNC connector and knob protrusions)
Weight: 5.7oz.
RF Connection: Right-angle BNC female
Length: 65ft. insulated 26 AWG high strength, high conductivity Bare Copper Clad Steel (BCCS), UV Resistant Polyethylene jacket
Note: Antenna is factory-tuned, with additional length available for end-user final tuning.
The Stealth Ultra-EFHW4010 all-black antenna is for hams who want to operate under the radar or who need to operate discreetly in HOA-restricted environments. Stealth appearance, full performance.
No antenna tuner required.
What's in the Box:
SPOOLTENNA ULTRA-EFHW4010
Field Testing Report for that serial number
QRP code for Quick Start Guide and Owners' Manual (available for download on our website)
Features:
Center hole - 8mm (approximately 5/16") for quick deployment using a standard screwdriver as an axle (screwdriver not provided)
Low-profile winding knob for easy set up and tear down
Thermal venting on back for high-duty cycle operation
4mm banana jack for quick connection/disconnection of radiating element
8mm mounting holes on face and back side of the product for mounting or hanging flexibility
Right-angle BNC connector to align with feedline direction
Matching circuit captive within the barrel of the spool to protect circuit components
Strain relief on both ends of the radiating element
Supplied with BongoTies® tie for retaining wire on the spool
Designed for use with lightweight coax like RG-174 coax with 5 integrated ferrites to choke return RF (available as optional accessory)
Additional Features & Specifications:
Frequency Range:
7.0 - 7.3 MHz (40M)
14.1 - 14.35 MHz (20M)
21.0 – 21.45 MHz (15M)
28.0 – 29.7 MHz (10M)
Power: 100W SSB, 50W CW & digital
Dimensions:
Diameter: 3.0 in.(76mm)
Thickness: ~ 0.98 in. (25mm) (minus the BNC connector and knob protrusions)
Weight: 5.7oz.
RF Connection: Right-angle BNC female
Length: 65ft. insulated 26 AWG high strength, high conductivity Bare Copper Clad Steel (BCCS), UV Resistant Polyethylene jacket
Note: Antenna is factory-tuned, with additional length available for end-user final tuning.
Antenna, Portable, EFHW Wire, SPOOLTENNA ULTRA, 40-10M, 100W SSB 50W CW/Digital, 65ft. Length, Insulated 26AWG Wire, Right Angle BNC Female, Each
Part Number: OOL-ULTRA-STH
Not Yet Reviewed
Estimated Ship Date: Nov 11, 2026 if ordered today
Estimated Ship Date: Nov 11, 2026 if ordered today