CHELEGANCE JNCRadio

M-104 ANTENNA KIT USER MANUAL

https://chelegance.com/product/m-104-super-portable-4-band-shortwave-antenna-kit-for-sota-pota/

1-1. DESCRIPTION & SPECIFICATION

This kit is a super portable antenna design, for typical outdoor applications such as SOTA, POTA or automobile operations.

It is designed to be using different frequencies by changing specific coils accordingly.

All the components are packed with a 180*110*30mm plastic box which makes it very easy to be carried by operators for field operation.

FREQUENCY RANGE	7/14/21/28 MHz
POWER	50W PEP
CONNECTOR TYPE	UHF-J
LENGTH(EXTENDED)	1.4 METER
DIMENSION	18011030MM
WEIGHT	0.32G

⚠️ WARNING: Do not power the antenna more than its PEP power ratings.

1-2. PART LIST

1 X WHIP ANTENNA
1 X ANTENNA BASE
1 X 7 MHZ COIL
1 X 14 MHZ COIL
1 X 21 MHZ COIL
1 X 28 MHZ COIL
1 X 4-16 ADAPTOR (FOR RADIALS/GROUNDING)
1 X 4-10 ADAPTOR (FOR RADIALS/GROUNDING)
1 X CARRYING PLASTIC BOX

1-3. INSTALLATION GUIDE

Choose a coil according to the band you will operate on.
Connect the coil to the base.
Extend the whip antenna to its maximum length and hook it up on top of the coil.
[Recommended] Install radials or copper strap (not included in the kit) to the 4-16/4-10 adaptor. Place it between the antenna base and the mount position. If using in a car, connect the other end of the strap to the ground point of the car.

Illustration showing the antenna base connected to a frequency coil, with a radial or ground strap attached via an adapter to the base. This strap is intended for connection to a vehicle's ground point.

A close-up view of a car's metal chassis, highlighting a bolt that serves as a ground connection point for the antenna's radial or strap.

Adjust the length of the whip antenna as well as radials until you get sensible VSWR readings (using an in/external VSWR meter, VNA, or antenna analyzer).

1-4. RECOMMENDATIONS ON ACCESSORIES

To improve the efficiency of this GP antenna, having radials is very important, especially for the M-104, as it sacrifices some efficiency to achieve its portable size.
It is recommended to have an antenna analyzer or VNA to read the parameters of the antenna setup.
An antenna tuner would also be beneficial.

	Chelegance JPC-12 GP Portable Shortwave Antenna - User Manual and Specifications Detailed specifications, installation guide, and part list for the Chelegance JPC-12 GP Portable Shortwave Antenna, designed for amateur radio applications.
	Chelegance KC4 Shortwave 4-Band Vertical Antenna: Installation and Specifications Detailed information on the Chelegance KC4, a 4-band vertical antenna covering 40m, 20m, 15m, and 10m. Includes specifications, part list, and installation guide.
	JNCRadio MC-750 Portable HF GP Antenna - User Manual and Specifications Comprehensive user manual for the JNCRadio MC-750 Portable HF GP Antenna by Chelegance. Features include detailed specifications, part list, step-by-step installation guide, and usage instructions for amateur radio operators.
	JNCRadio MC-750 Portable HF GP Antenna User Manual \| Chelegance Comprehensive guide for the Chelegance JNCRadio MC-750, a 100-watt portable HF GP antenna. Covers specifications, parts list, installation instructions, and frequency adjustment for amateur radio operators.
	Chelegance JCase705 Protective Case for Icom IC-705 - Waterproof POTA/SOTA Detailed information on the Chelegance JCase705, a waterproof protective case designed for the Icom IC-705 radio, ideal for POTA/SOTA activations. Includes specifications, part list, and installation guide.
	CHELEGANCE External Memory Keypad for ICOM Radios - Features & Installation Learn about the CHELEGANCE External Memory Keypad for ICOM radios (IC705, IC7300, IC7610, IC7100). This guide covers its specifications, part list, and installation for enhanced radio communication in CW, RTTY, and SSB modes.