HAMGEEK JPC-7 Multi-band Shortwave Antenna Coil Induction/Positive V-Antenna/Aluminum Tube Vibrator For Outdoor Communications

Description:

JPC-7 is a mini portable antenna designed for field communications. It is simple and fast to put up. It can be completed in 5 minutes by one person.

The antenna optimizes its induction coil, increases the strength of the shrapnel, and makes the contact between the coil and the shrapnel more reliable. The new coil marks the number of turns in the 20 and 40-meter wavebands, respectively. Even without a talent, you can easily set up and adjust the antenna. When using the 20-meter band, just move the slider contact to the gold mark position, and then shorten the unilateral rod antenna by about 10cm. Finally, adjust the whip antenna slightly according to the frequency you need. When using the 40-meter wave band, move the slider contact to the silver mark position, and after pulling out the rod antenna, it can be used directly.

Attention:

It is recommended not to add antenna oscillators at will, otherwise the base may be damaged. If you want to add an vibrator, add up to two aluminum tubes on each side.

Features:

- The antenna is a mini portable antenna designed for mobile communications in the field. It can work at 2, 6, 10, 12, 15, 17, 20, 30, 40 meters, with a length of 34.5 cm after shrinking.

- Two oscillators spread out to 6.6 meters.

- Easy to set up. All you need is a support pole and feeder, and everything else is ready for you. In addition, if you like the way of GP installation, you can buy another ground net and ground anchor to form a set of delicate PAC-12. Such a set of antennas is equivalent to one each of JPC-7 and PAC-12, which is very economical.

- Personal call sign can be made by laser engraving. If it is needed, please contact us.

- The coil bobbin and the base are made by die-casting, and they are handmade. It is made of nylon which features very high strength. Don't worry about damage.

- Aluminum tubes are sandblasted and oxidized to black, which is very beautiful and durable.

- Easy and fast to set up. It can be completed in 5 minutes by one person.

- The aluminum parts in the connector base have been replaced with copper parts, which is stronger and more durable.

- A special black hand bag perfectly protects the antenna, making it convenient to carry.

Precautions:

1. The assembly sequence of each antenna oscillator is: connector-two sections of aluminum tubes-induction coil-whip antenna.

2. When using an antenna analyzer with low transmit power, do not coil the feeder. All feeders must be opened, otherwise the adjustment of standing waves will be affected. When using a higher power antenna analyzer, there is no requirement on the shape of the feeder.

3. The first circle is near the whip antenna. Counting starts from the side with the fixed coil screw, half turns with screws are not counted.

4. When the standing wave is adjusted, if there is an antenna analyzer, first find the lowest point of the standing wave and check the resonance frequency. If the resonance frequency is high, the antenna is short. Need to lengthen the whip antenna or increase the number of coils of the induction coil. If the resonance frequency is low, shorten the whip antenna or reduce the number of turns of the induction coil. If you don't have an antenna analyzer, use the standing wave table that comes with your radio. Set your radio to FM, AM or RTTY mode, and reduce the transmit power to about 10W. Press the transmitting key, rotate the radio frequency knob, find the minimum point of standing wave in each frequency band, look at the level of the resonance frequency, and then use the above method to adjust.

Reference Data:

- 40-meter wave band: 7.050-counting from the side of aluminum tube, which is the 5th and 4th circles (silver mark position), the rod antennas on both sides are all pulled out, the standing wave of 7.050 is 1.2-1.5.

- 20-meter wave band: 14.270-The 7th and 9th turns (golden marked position) are counted from the side of the whip antenna. After all 10 sections of the whip antenna are pulled out, shorten the whip on one side by about 10cm. Please note that what is shortened is the whip antenna on one side, and the other side does not need to be adjusted.

- 15-meter band: 21 megabytes are two turns on each side of the whip antenna, with the rod all pulled out.

- 10-meter wave band: Pull out all ten sections of the whip antenna, and then retract one of the whip antennas to about 7cm. The standing wave of 29.600 is 1.2. Note: No induction coil is required.

Attention:

The above data is the data when the antenna is erected with the positive V at the maximum angle. When the angle changes, the data will also be different.

PAC-12 upgraded JPC-7 Package Included:

- 2 x Plastic Head Screws

- 2 x Gold-plated Copper Pieces For V Antenna

- 1 x Induction Coil

- 1 x Telescopic Antenna

- 1 x Lamp Holder Adapter

- 1 x Balun

- 1 x Base

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JPC-7 Full Set Package Included:

- 1 x Set of Shortwave Antenna

- 1 x Connector Base (Material: Nylon)

- 2 x Multiband Coils (Material: Nylon)

- 4 x Black Alumina Tubes 19 x 320mm

- 2 x 2.5M Stainless Steel Whip Antennas

- 2 x Screws

- 2 x Copper Connection Parts for Positive V Erection

- 1 x Cloth Carry Bag

- 1 x Aluminum Adapter for Tripod

Note:

- Paper instructions is not included.

- Other items in the pictures are not included.

Erection method for JPC-7 used as JPC-12 or pac-12. The two balun wires are respectively inserted into the corresponding jacks of the vibrator and the ground anchor. If ground anchor and earth mat are needed, please contact us to pay extra money.

Call Sign via Laser Engraving:

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Coil Perfect Description:

It is a new induction coil. The manganese steel contact shrapnel made by reopening the mold has a small groove added to the contact part of the coil, which is accurate in positioning and more reliable in contact.

Coil Perfect Features:

- Induction coil can be used for pac-12, jpc-7

- The frame material of the induction coil is made of nylon with very high strength

- The coil bobbins are all processed by molds, not manual turning

- The coil is made of 1.0mm 304 stainless steel wire

- Interfaces on both sides: m10

Coil Perfect Package Included:

- 1 x Set of Induction Coil

Note:

- The coil purchased separately is not marked as it is pictured. Thank you for your understanding!

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Positive-V AntennaDescription:

JPC-7 simplified positive V portable HF shortwave antenna 14M-50M comes with one Balun and two 5.28M/17.3FT whip antennas.

Positive-V AntennaPackage Included:

- 2 x 5.28M/17.3FT Stainless Steel Rod Antennas

- 1 x Positive V Base

- 1 x Special Adapter For Lamp Stand

- 1 x 1:1 Balun

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Aluminum Tube Extended Vibrator Features:

- Simplified design

- Set of 4pcs alumina tubes

- Specification 19 x 320MM/7 x 12.6" (anodic sandblasting oxidation)

- Mini portable jpc-7 pac-12 dedicated extended vibrator, plus the antenna efficiency will be improved

- Length of aluminum tube: 32cm/12.6" (not including screws)

Aluminum Tube Extended VibratorPackage Included:

- 4 x Antennas

Note:

- If you add more antennas, it is recommended to add a drawstring between the two vibrators to avoid violent movements when lifting the antennas to increase the strength.

- The aluminum tubes are not laser engraved.