HB3YAQLucerne
K40 · CB radioMY COMBINATION
SF300B
Black CB mobile antenna with a 3/8-inch mount for my Sirio magnetic base.
At a glance
All specifications ↓- Length in product description
- Approx. 90 cm; source lists 103 cm packaging length
- Frequency range
- 26–30 MHz
- Inventory length
- 103 cm
- Electrical design
- Loaded quarter-wave antenna, top-loaded
- Thread
- 3/8″ × 24
- Length
- 103 cm
- Connector
- 3/8″
Sirio MAG 145 · 3/8″
160 mm magnetic mount with a 3/8-inch fitting for my K40 SF300B.
Explore ↗Dimensions and combinations reflect my antenna collection.
K40 SF300B · Product source ↗The K40 SF300B belongs to the Superflex mobile-antenna family for CB and the 10 m band. Its fibreglass-based radiator has a top-loaded coil and an adjustable tuning tip. Moving the tip adjusts resonance for the intended frequency range.
The 3/8″ × 24 thread fits the paired Sirio MAG 145 3/8 base. The source describes a flexible radiator and black protective sheath. Length figures differ: the inventory lists 103 cm, while the product description gives approximately 90 cm; that source also lists 103 cm as the packaging length.
Features & equipment
- Top-loaded coil and adjustable tuning tip.
- Flexible fibreglass radiator with protective sheath.
- Standard 3/8″ × 24 thread.
Specifications
Frequency range & mounting
- Frequency range
- 26–30 MHz
- Electrical design
- Loaded quarter-wave antenna, top-loaded
- Thread
- 3/8″ × 24
- Colour
- Black
- Inventory length
- 103 cm
- Length in product description
- Approx. 90 cm; source lists 103 cm packaging length
- Tuning
- Adjustable tuning tip, checked with an SWR meter
- Paired base
- Sirio MAG 145 3/8″
Documents & sources
- K40 SF300B – product page (opens in a new tab)Specialist retailer