Helium Hotspot Miner 5.8 dBi Indoor Antenna Kit, 11ft CFD-200 Antenna Extension Cable & Magnet Base for RAK Nebra Indoor Bobcat SyncroB.it
This is an indoor omni-directional 915 MHz antenna with 5.8 dBi gain. Also included is a heavy duty magnetic base that measures 2.5 inches in diameter and weighs 11 ounces,
Full Spec Sheet
Compatible with RAK 2, Nebra Indoor, and Bobcat 300 (915 MHz USA and Australia versions only).
This is a rigid solid antenna with no elbow bend point, therefore if you plan to use directly with your miner without using the magnet base, please note this. We recommend using with the included magnet base for maximum performance.
See also our Rokland 8 dBi 915 MHz Outdoor Antenna for Miners.
Is this 5.8 dBi indoor antenna comparable to the Rokland 8 dBi outdoor antenna?
This is shorter at 15 inches, not weather proof, and best to put in a window, or a more open area inside vs. where your miner sits. Our outdoor antenna is more effective for IoT equipment/miners if you do not have a high density of other hotspots around you. However this indoor kit could be a good upgrade over just having your factory antenna connected to your miner if an outdoor antenna is not possible (some HOAs do not allow an outdoor antenna for example).
Beware cautious of gain inflation- some places arbitrarily inflate antenna gain number to appear better than competing products. Because gain cannot be easily measured by the end users, we have seen similar antennas marketed as numbers like 18 dbi to 30 dbi that are not even 20 inches tall. Why buy a 5.8 dBi when you can get a similar looking "18 dbi" for the same price, right? Rokland has been making antennas for over 14 years for WiFi, 4G, and other applications. Our 915 MHz antenna are listed with actual specifications. You also do not want extremely high gain as your path will be very narrow and miss other hotspots.
I see similar looking antennas online that say for 600 Mhz to 2700 Mhz, is a wider frequency spectrum better?
Antennas with a focused spectrum will have better performance on that band segment vs antennas with very wide spectrum. We would not recommend using antennas that are also WiFi 2.4 Ghz compatible with your mining equipment. This antenna has a frequency range of just 900-930 Mhz to give you maximum performance.
More about this kit
You can use the included magnet base with the factory antenna of any of the listed miners, or with the included 5.8 dbi antenna. As gain increases, your vertical path will decrease, allowing you to communicate with hotspots from a greater distance but reducing your ability to be in the path of closer hotspots. As your community experiences new miners over time, it may be necessary to adjust what antenna you are using to deal with the density.
Frequency range: 900-930 MHz
Gain: 6 dBi
Polarization:Vertical; Directivity:Omni-Directional; Material:ABS,Copper
Antenna connector: RP-SMA male; Impedance:50 ohm; Antenna height:39cm/15 inches
Base diameter 2.5 inches
Base cable length: 11-foot CFD-200 shielded low loss cable
Low loss shielded cable
Our cable includes 11 feet of CFD-200 shielded coax cable built-in, with RP-SMA termination (to connect to your miner). CFD-200 has a gain loss of just 1.1 dBi at 11 feet. Lower cost bases generally use RG58 cable which has a loss of 1.7 dBi, over 50% more loss.
Use with your Nebra, Bobcat, or RAK miner to help increase your coverage area. This is an indoor antenna and not rated for outdoor use. Check for Rokland brand outdoor mining antennas online. We recommend placing this inside near a window, or in a more optimal place for sending and receiving than where your miner currently is.
Warranty & Support:
Complimentary Telephone and Email/Live Chat Support (Click Here)
State sales tax of 7% will be added to FLORIDA purchases only. There is no sales tax for any other state.
Return Policy: You may return any item, open or used, for an exchange or refund at your discretion within 30 days of receipt. Because range can vary greatly based on your environment, if you are not sure a particular product will meet your range needs please contact us before buying. Orders with free shipping selected will incur a 10% restocking fee to help us cover the original shipping cost, unless the item is defective or different from the advertisement. Any expedited shipping charges paid, including return shipping, are never refundable. If you opt for an exchange, we will pay to ship the replacement to you. Items must be returned the way they were received, with all pieces, documentation, and retail packaging (if applicable) included. For bulk purchases, see our bulk purchase return policy here.
The change from the Bobcat original antenna to the 5.8 dBi was an upgrade and resulted in more witnesses and HNT being mined. I tried the outdoor 8 dBi indoors and it was not as effective so I switched back to the 5.8 dBi.
It made me 150 hnts in a week after the change