MegaDipol MD300DX Active Dipole

Product information "MegaDipol MD300DX Active Dipole"

OMG ?! This antenna will amaze you!

The MegaDipole 300DX is a broadband active dipole with a maximum upper working frequency of 300 MHz. The dipole reacts to the electrical component (E-Field) of the electromagnetic field and will deliver best results regarding signal strength and SNR (signal -to-noise-ratio) at locations with little or no locally generated interference. Nonetheless, the receiver to be coupled to this antenna should have a high enough dynamic range so that it can effectively process the received signals.

In contrast to simple E-field antennas with only one radiating element, the symmetrical construction of the MegaDipole 300DX, will result in almost no negative resonance effects or reflections caused by the coaxial cable.

First choice for DXer

The MegaDipol MD300DX is the ideal antenna for DXers. Particularly in electrically quiet environments, it can really play to its strength in efficiently amplifying weak signals. In practical operations, a maximum signal-to-noise ratio of 110dB was achieved! (see image )

Wideband

With prodigious broadband capability and constant receive characteristics the MegaDipol MD300DX is ideal for wideband receivers, SDR's and WEB-SDR such as KiwiSDR etc. The MegaDipol MD300DX can of course also be operated on all other receivers, including lower-end SDRs and portable world receivers.

Dual Power Power Supply

The MegaDipol is nominally supplied with 10 - 15V DC (max 40mA), however, it can be operated across a wide variety of supply voltages. The antenna can even be operated with slightly reduced IP values at the same gain with only 5 volts via USB. This offers a significant advantage in that you can supply the MegaDipol on trips away from the radio shack or DX expeditions autonomously, using a low-noise USB power-bank.

"The MegaDipol has already attracted a lot of attention with its receive performance at various events such as DX-Camps, field days and in-house exhibitions. In these tests, the MD300DX surpassed the existing antennas usually by 10-15dB in the SNR."

You want to test the MegaDipol MD300DX live on air?

If you would like to test the MegaDipol MD300DX 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 vertical MegaDipol MD300DX is in Ireland and can handle up to 4 users at a time.

Further test links:

KIWI-SDR in Norway, south of Oslo: LINK

Customer Feedback
"MegaDipol has arrived and installed. It seems to be a great antenna, especially compared to dimensions!"

Technical data

Frequency range: 9kHz - 300MHz
IP3: typ. +30dBm (@7.00 & 7.20MHz)
IP2: typ. +78dBm (@7.00 & 7.20MHz)
Size/weight: 98 x 90 x 38mm / 0.12kg

Whats in the Box?

MegaDipol MD300DX
Power Inserter CPI 1500UNI
2x 2.5m long radiating elements (PVC-coated, salt-water resistant stainless steel ropes)
2 insulators for installation (weatherproof plastic material with 4.5mm fixing hole)

As noted previously, it is important that the connected receiver has a correspondingly high dynamic range in order to be able to optimally process the delivered signals.

Recommendation

Near the sea or in case of possible contact with salt water we strongly recommend the use of our weather protection case.

Please note!

The offered coax cables are custom-made and therefore not returnable / refundable.

Accessory Items

Antenna mast mounting bracket for Boni-Whip, MegActiv, GigActiv and Megaloop

This V4A mounting bracket fits for the Boni-Whip, MegActiv, GigActiv and the MegaLoop.

From €17.99*

Details

CCMC30 Common Mode Noise Filter

CCMC30 Common Mode Noise Filter Noise filters are nothing new and are often used for transmitting purposes. They are used to prevent unwanted radiation via the coax shielding. It is less known that they can also suppress unwanted radiation when receiving signals, especially when an active antenna is used. However, in this case, the situation is reversed: en route to the antenna, unwanted interferences from electric home appliances can be effectively eliminated. NTi's Coaxial Common Mode Noise Filter (CCMC30) has been especially optimized for maximum common mode noise rejection of >30dB wide band in the frequency range of 150kHz - 30MHz. With slight limitations a much wider frequency range is covered. In the medium wave range for example a noise suppression of up to 45 dB can be achieved. This is possible by using a cascaded system of ferrite cores with various frequency dependent material properties, combined with high quality coaxial cable. For outdoor use, the system is housed in a water-proof enclosure. We recommend to connect the CCMC30 as closely as possible to the receiver.With regard to efficient noise suppression, the CCMC 30 is not very much different from the galvanic isolator GI1000. However, the CCMC30 performes down to lowest frequencies including DC voltage, in contrast to the GI1000, which blocks DC voltages and very low frequencies. The CCMC30 can thus be connected directly to the coax cable which passes the supply voltage or the control signals to the active antenna. A series connection of the GI1000 directly connected to the receiver followed by the CCMC30 right behind the power inserter may result in an even better performance. Technical Data Guaranteed frequency range: 150 kHz – 30 MHz Common Mode Wave suppression: >30 dB: 150 kHz -30MHz (>20 dB: 30kHz-60MHz) Insertion loss: <1 dB (up to max. 150 MHz) Size: 100x68x50mm (132mm with BNC connectors) Connectors: 2x BNC 50Ohms Weight: 320g Made in Germany

€99.99*

Tip

Spiderbeam 12m HD Mast

Spiderbeam 12m HD Mast Der Spiderbeam Heavy Duty Fiberglasmast eignet sich perfekt zum Bau verschiedenster Antennen. Eine einzelne Person kann den Mast spielend leicht innerhalb weniger Minuten aufstellen. Speziell verstärkt und eigens entwickelt aufgrund unserer fortlaufenden Bemühungen nach noch besser belastbarem Portabel-Equipment! Dies sind extrem robuste Masten, mit deutlich dickerer Wandstärke (bis zu 2mm!) als die herkömmlichen "Angelruten". Sie sind in einer speziell verstärkten Wicklungsweise hergestellt - viele Lagen Fiberglas in abwechselnder Richtung (längs/quer) gewickelt ergeben eine deutliche Verstärkung in Längs- und Querrichtung. Stärkere Verbindungsstellen wurden außerdem durch eine deutlich größere Überlappung der einzelnen Rohrsegmente untereinander erreicht. Spiderbeam Heavy Duty Masten eignen sich prima zum Bau von 40/80/160m Draht Vertikals bzw. inverted L Antennen. (Lee W9OY hat damit z.B. eine leistungsfähige 80/40m Vertical aufgebaut) Sie eignen sich ebenso gut für leichte 1-Ele Quads oder Delta Loops für 20-10m, oder auch Dipole für alle Bänder, besonders bei Speisung mit Hühnerleiter (die meisten Baluns sind ein bisschen schwer). Mit mehreren dieser Masten ist der Bau von Leichtbau-Beams für 40 oder 80m denkbar. Da sogar das oberste Segment 8mm Durchmesser (und 1.4mm Wandstärke) auweist, kann man diese Stangen auf der vollen 12m Länge benutzen - bei anderen Stangen sind die obersten Segmente meist so dünn wie eine Reitpeitsche und daher kaum zu etwas zu gebrauchen. Während unserer Tests konnten wir 80m inverted Vee Dipole (aus 1mm Kupferlackdraht) ganz oben in der Mastspitze befestigen, was mit einer "Angelrute" auf keinen Fall möglich ist. In 9-10m Höhe lassen sich ohne Probleme kleine VHF/UHF Yagis befestigen. Der beste (und günstigste) Draht für solche Anwendungen (Vertikals, Loops, Dipole, etc.) ist 1mm Kupferlackdraht o.ä. Zum Abspannen eignet sich 1mm Angelsehne o.ä. hervorragend. Die ersten Prototypen wurden November/Dezember 2004 an der Nordsee bei Windstärken bis zu 120 km/h erfolgreich getestet! Seitdem wurden weit über 3000 dieser Masten weltweit erfolgreich installiert. Gleich bestellen und ab sofort Portabelfunk mit einem Profi-Mast der neuen Generation geniessen. Speziell verstärkter Profi Fiberglas-Teleskopmast volle Höhe (Länge) 12m Transportlänge 1.18m Gewicht 3.3kg Durchmesser unten 55mm Durchmesser oben 8mm Wandstärke 1.4mm (oben) - 2mm (unten) Anzahl der Segmente 12 Material Fiberglas, schwarz, UV beständigmehrlagig gewickelt und speziell verstärkt

€95.00* €105.00* (9.52% saved)

Tip

Wetterschutzgehäuse für MegaLoop, Paloran und MegaDipol

Weather protection case for MegaLoop and MegaDipol

Weatherproof housing for MegaLoop and MegaDipol This UV-protected and ventilated polycarbonate case protects your MegaLoop (all models since 2014) or MegaDipol from heavy rainfall and other extreme weather conditions like a second skin. A sliding stainless steel sleeve additionally protects the drain on the BNC connector. The screw connections for the radiating elements and grounding are led through to the outside and are also made of stainless steel. When operating in salty environments and near the sea, the weatherproof housing should definitely be used additionally. Our antennas are designed to be splash-proof, but salty capillary water can conquer even the best sealing gasket over time. The rear ventilated weatherproof housing effectively prevents direct contact of the antenna electronics with harmful weather influences. Assembly Instructions You can find assembly instructions here: LINK

€65.00*

Akkupack für den rauscharmen Betrieb unserer Antennen: MegaLoop, MegActiv und GigActiv.

PowerBank

PowerBank Actually this PowerBank is intended for charging smartphones. But this model can also power our antennas: MegaLoop, MegActiv 305 and GigActiv 3005, autonomously and noise-free. Ideal for mobile use. 5V with 4000mAh, including USB 3.0 connection cable (approx. 10 cm long) Technical specifications Input voltage: DC 5 V, ≥ 500 mA (USB compatible) Output voltage: 4.2 V ± 1% (charging slot) / 5 V ± 5% (USB) Output current: 2 x 1A MAX (charging slot) / 2A MAX (USB) Dimensions: 94 mm × 44 mm × 25 mm Weight: 46.5 g (without connection cable) Scope of delivery: Powerbank with 2x18650 LI-ION batteries (2x 2000mAh), 2x retaining rubber, 1x USB 3.0 connection cable

€45.00*