SDRplay RSPdx-R2

MegActiv MA305FT Wide Band Active Antenna Wide frequency range 9kHz – 300MHz Small dimensions Dual Power Supply: 5,5V – 15V Selectable FM band stop filter with low pass function Ideal for traveling, at home or DX-Camps IP3:>typ. +30dBm / IP2:>typ. +50dBm Enlarged and flexible 200mm radiating element The new MegActiv MA305FT is an evolution of the popular MegActiv MA305. In addition to small improvements in electronics, the new MegActiv MA305FT has been equipped with a switchable FM band-stop filter. Thus, disturbing radiation from the FM band between 88 and 108 MHz can be easily minimized The new MegActiv MA305FT close the gap between the Boni-Whip and the GigActiv GA3005 E-Field Antennas. This low noise active antenna, which is produced according to the highest standards, covers the frequency range between 9kHz and 300MHz. With a radiating element of only 22 cm / 8,66 inch it can be erected inconspicuously. It can be powered with 5-15 V DC (max.10mA) and alternatively with the supplied Power unit CPI 1500DP via USB. Flexible FM-band stop filter Based on the well proven Megactiv platform, an additional low pass filter and a FM-band stop filter were integrated which can be activated or deactivated with a jumper. In case of FM-interferences, the FM bandstop filter can be activated with a jumper and so FM signals between 88 MHz and 108 MHz will be attenuated by 25 – 40 dB. Flexible power supply The MegActiv MA305FT can be operated by two different kinds of power sources. It can be powered either by a conventional plug power supply (5,5 / 2,1mm round plug) or via USB with a optional Cable. Powering via USB has the advantage that no external power supply is needed and that the antenna can be operated  autonomously and noise-free with a separate USB PowerBank. The supply voltage range is 5 - 15V DC (10mA max) and thus the antenna is also well suited for portable use. You want to test the MegActiv MA305FT live on air? If you would like to test the MegActiv MA305FT active antenna live, you can now conveniently do this over the Internet with a KIWI SDR. Just click on this Link and you can browse the whole band from 10kHz to 30MHz. The linked KIWI-SDR with a MegActiv MA305FT is located in Bonn (DL0DTM Clubstation Deutsche Telekom) and can handle up to 4 users at a time. Features Integrated double surge protection of the active components: Coarse protection by gas discharge tubes with 60V firing voltage with max. pulse leakage current 1kA (8/20µs) with additional integrated ESD fine protection of max. 2kV. Standard delivery with Power unit CPI1500DP (external power supply and USB-operation possible) IP3:>typ. +30dBm IP2:>typ. +50dBm Integrated double overvoltage protection of the active antenna part Integrated double surge protection of the active components: Coarse protection by gas discharge tubes with 60V firing voltage with max. pulse leakage current 1kA (8/20µs) with additional integrated ESD fine protection of max. 2kV. Fernando from Fenu-Radio.ch did the first comparison Test in Mai 2015 and released this test on his Page in German: www.fenu-radio.ch. Quote from the review by FenuRadio: (translated) "The NTi MegActiv is a small receiving antenna with excellent reception performance. The construction proved to be unproblematic, similar to the Boni-Whip. From VLF up on the FM band, the MegActiv receives very well despite their small size. When properly setup it provides a nearly unbeatable signal / noise ratio!" Whats in the box? MegActiv MA305FT Whip / Radiator Junction box CPI1500DP Made in Germany Please note! The offered coax cables are custom-made and therefore not returnable / refundable.

BNC-SMA Adapter in premium Quality Many of the small entry-level SDRs such as SDRplay, Airspy, Airspy HF+ etc. as well as the high-quality Winradio, Elad FDM-S1 and FDM-S2 etc. have an SMA socket as an external antenna connector. This premium adapter, made of nickel-plated bronze, adapts a receiver or handheld radio with an SMA socket to a BNC socket. Quality you feel and hear You will immediately notice the high weight. This is because this adapter is made of nickel-plated bronze in premium quality. The PTFE dielectric ensures lowest insertion loss and a quiet frequency response.  Technical specifications Type: BNC female to SMA male Case: bronze, nickel plated Center pin: bronze with gold coating Frequency range: DC to 4GHz Dielectric: PTFE RoHS : Compliant

Mini adapter cable Very short, flexible adapter cable made of Hyperflex 5 for short connections in top quality. The mini adapter cable is the ideal solution if you either want to connect two devices of different sizes or need a short, flexible coax connection. If you want to connect small SDRs like the Airspy HF+ with accessories like the GI300/or GI1000, there is often a problem: the BNC adapter and the GI300 or GI1000 are much bigger than the HF+ SDR receiver. Now you could use a regular adapter cable, but since the GI300/1000 separates the ground from the line, the cable must be as short as possible, but still flexible enough to bridge the height difference. Also, it is often not a good idea to plug the GI 1000 directly into a device, as the weight could damage the socket. This mini adapter cable consists of a short piece of Hyperflex 5, about 10-14cm long and SMA or BNC connectors. The result is impressive and works very well.

This simple, lightweight travel loop is quick to deploy and the perfect companion for Airspy and similar SDR radios!   Most of the problems were related to ineffective RX antennas that were too sensitive to the surrounding noise. So we decided to design a new Noise Cancelling Passive Loop (NCPL) to fix the noise problem. The YouLoop is a generalization of the Möbius loop where a balanced electric shield is used as the centre of a multi-turn loop. The rest of the turns run inside the shield. To preserve this electric balance from alteration by the transmission line, a low loss miniature BALUN is used. The more turns, the higher gain at the lower frequencies. Note that to preserve the electric balance, the number of turns increases by increments of two. An aspect of this two-turns coax build is its response in VHF. The same HF magnetic loop can be used in the FM and the 2m HAM bands with a slight change of its core principle, it’s now a folded dipole. The feed point of the folded dipole is on the top and the actual legs are composed of the coax ground. In order to further improve the impedance matching and flatten the frequency response, a high impedance external pre-amplifier can be used near the antenna to present a constant output impedance to the receiver. This could be the best option for you if you do not want or cannot build the antenna from scratch. AS the only remaining action is to connect the SMA cables. Specification HF Response: 10kHz to 30 MHz VHF Response: up to 300 MHz Maximum Power: 250 mW No Tuning required Low-Loss Wide-Band BALUN with 0.28 dB loss typ. Dimensions: H-31cm x W-24cm x L-17cm Weight: 0.5kg