HamGeek JPC-7/JPC-12 Portable Antenna Shortwave Antenna Kit & Optional Antenna Elements Loading Coil

4PCS HamGeek JPC-12 Extended Elements Antenna Elements for PAC-12 JPC-7 Portable Shortwave Antennas

Features:
* Simplified design
* Anodized aluminum tubes
* Specifications: 19 × 320 mm (anodized sandblasted finish)
* The extended antenna elements are specially designed for the mini portable JPC-7 and PAC-12 antennas. Adding these elements improves antenna efficiency by increasing the effective length of the antenna.
* Aluminum tube length: 32 cm (excluding screws)
* If multiple elements are added, it is recommended to install a guy rope between them to reduce excessive movement during antenna raising and lowering, thereby enhancing structural strength.
* The aluminum tubes do not have any laser engraving.

Packing List:
* 4 x HamGeek Extended Elements
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HamGeek JPC-7 Antenna Portable Shortwave Antenna Kit Upgraded Version of PAC-12 for Radio Enthusiasts

Package Included:
* 2 x Plastic-head screws
* 2 x Gold-plated copper parts for V antenna
* 1 x Loading coil
* 1 x Telescopic antenna
* 1 x Lamp holder adapter
* 1 x Balun
* 1 x Base
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HamGeek JPC-12 High-End Version 7MHz-50MHz 100W Portable Shortwave Antenna Balcony Outdoor Shortwave Antenna

Description:
The HamGeek JPC-12 portable shortwave antenna can be used as a field or balcony-mounted antenna. It is a mini portable antenna specifically designed for outdoor communication. Easy and quick to set up, it can be assembled by one person in just five minutes.

Features:
Loading Coil with Sliding Tuner
* We have once again optimized the loading coil. On top of the original single spring contact, we added an extra one to increase the contact force, making the connection between the contact and the coil more reliable. The new version of the antenna replaces the adjustment screw and plug used on the original JPC-7 and PAC-12 with a sliding tuner, making SWR adjustment simple and effortless—just slide the tuning block gently with your finger.

Aluminum Alloy Base
* Anodized black finish

Oxidized Aluminum Tubes
* Dimensions: 19×320 mm (anodized and sandblasted finish)

10-Strand Flat Cable for Counterpoise
* Tear off as needed during use; typically, three strands are sufficient.

Ground Anchor
* Dimensions: 10×240 mm (no electroplating treatment, to maintain good grounding)

Telescopic Antenna
* Custom 2.5-meter stainless steel telescopic antenna

Dedicated Cloth Bag
* The internal compartments are well-organized for convenient storage. Durable and sturdy.

Antenna Performance Specifications:
* Carrying Weight: Approximately 1.4 kg
* Collapsed Length: About 34.5 cm
* Deployed Length: About 410 cm
* Frequency Range: Operates on 40m, 30m, 20m, 17m, 15m, 12m, 10m, and 6m bands (7 MHz – 50 MHz)
* Impedance: 50Ω
* Power Handling: 100W
* SWR (Standing Wave Ratio): Less than 1.3 on the 40m band; Tunable to 1.1 on other bands

Sliding Tuner Reference Data:
7 MHz:
* Position: 4 turns near the aluminum tube side
* Telescopic rod: Retract approximately 10 cm
* SWR: 1.1–1.3

14 MHz:
* Position: 6 turns near the telescopic antenna side
* Telescopic rod: Retract approximately 20 cm
* SWR: 1.1–1.3

21.4 MHz:
* Configuration: Use 4 aluminum tube sections + 7 sections of telescopic antenna, extended approximately 10 cm further
* SWR: 1.1–1.3

29.6 MHz:
* Configuration: Use only the telescopic antenna, fully extended, then retracted by about half a section
* SWR: 1.2

Note:
* The above parameters may vary slightly depending on the environment. You can make minor adjustments based on your actual operating conditions.
* The antenna does not include the JPC-7 base, clamps, adapters, feeder line, antenna base, or loading coil for balcony installation.

Precautions:
* This listing does not include the feed line.
* Place the counterpoise ring directly onto the ground anchor's screw rod and tighten it to the base. Then assemble in the following order: Connector Base → 4 Aluminum Tubes → Loading Coil → Telescopic Antenna.
* SWR Tuning: 1. If you have an antenna analyzer: First, locate the point with the lowest SWR and check whether the resonant frequency is too high or too low. If the resonant frequency is too high, the antenna is too short — extend the telescopic antenna or increase the number of turns on the loading coil. If the resonant frequency is too low, the antenna is too long — shorten the telescopic antenna or reduce the number of coil turns. 2. If you don't have an antenna analyzer: Use the built-in SWR meter on your transceiver. Set the radio to FM, AM, or RTTY mode, lower the output power to about 10 watts, press the transmit button, and adjust the radio's tuning knob to find the point with the lowest SWR. Then follow the same method above to fine-tune the antenna.
* When using the counterpoise, tearing off 3 to 4 strands is sufficient. Adjusting the angle of the counterpoise can change the antenna's impedance.

Packing List:
* 1 x Aluminum Alloy Base
* 1 x Loading Coil with Sliding Tuner
* 1 x 10-strand Flat Cable for Counterpoise
* 1 x Ground Anchor
* 1 x Telescopic Antenna
* 4 x Aluminum Tubes
* 1 x User Manual
* 1 x Storage Bag
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HamGeek JPC-12 Loading Coil Practical Antenna Loading Coil Used with PAC-12 JPC-7 & JPC-350 Antennas

Features:
* JPC-12/JPC-7 loading coil
* The new loading coil features a redesigned manganese steel spring contact, manufactured with a new mold. A small groove has been added at the contact point with the coil for precise positioning and more reliable contact.
* The coil's frame is made of nylon material, offering very high strength.
* All coil frames are mold-processed, not handcrafted on a lathe.
* The coil is wound with 1.0 mm 304 stainless steel wire.
* Connector type on both ends: M10

Packing List:
* 1 x Loading Coil

Note: 
* The loading coil does not come with any markings.