DIY Kits

End Fed multiband antenna DIY kit for 10-15-20-40-80m 300Watt PEP SSBNew extended kit! This kit contains all the necessary components to build an EndFed 1:49 multiband antenna for the bands 10-15-20-40-80 meters up to 300 Watt PEP Phone. We have added a connection for the counterweight and the useful stainless steel ring etc. to the kit. This End Fed kit is supplied with the antenna wire of your choice: Standard antenna wire: This antenna wire consists of 1.0 mm2 fine stranded copper conductor with black PVC insulation. The total diameter is approx. 2 mm. Ideal for experiments or vacation antennas. As the core is only made of copper, this stranded wire will become slightly longer and therefore thinner over time. The tensile strength of this stranded antenna wire is limited. LF Antenna Strand - New!This high-quality antenna strand consists of 32 individual 0.20 mm wires made of hard-drawn, bare copper. The conductor cross-section is approximately 1.0 mm² and offers excellent conductivity combined with high mechanical strength. It has a total diameter of 2.1 mm, a weight of approx. 11 g/m, and a breaking load of about 40 kg. The robust black polyethylene (PE) insulation reliably protects the strand from environmental influences and ensures a long service life. The kit contains the following components: 1x toroidal core FT-240-431x enameled copper wire GR2 for winding the toroidal core (1mm) approx. 1.50 meters1x polycarbonate housing with transparent cover 100x100x60 mm (IP67)1x mini insulator 65 * 15mm2x simplex terminals up to 2 mm wire (wire rope terminal) 1x thimble approx. 23.5 meter antenna wire 1mm² black 1x capacitor 100pF 2kV DC 1x PL259 panel jack 1x extension coil 110uH ready wound and measured 1x shrink tube black 25.4-12.7mm 1x various screws, washers and nuts made of stainless steel 1x stainless steel ring 3x Fast-On ring contactType: MultibandLength: approx. 23 meters Connection: PL Max. Power: 300Watt PEP Phone Weight: approx. 600g Balun 1:49Informationen gemäß Art. 19 GPSR Adresse des Herstellers: Bonito - Gerichtsweg 3 - 29320 Hermmansburg - anfragen@bonito.net- www.bonito.netAdresse der verantwortlichen Person: Bonito - Gerichtsweg 3 - 29320 Hermmansburg - anfragen@bonito.net- www.bonito.net

End Fed multiband antenna DIY kit for 10-15-20-40-80m 100Watt PEP SSBNew extended kit! This kit contains all the necessary components to build an EndFed 1:49 multiband antenna for the bands 10-15-20-40-80 meters up to 100 Watt PEP Phone. We have added a connection for the counterweight and the useful stainless steel ring etc. to the kit. This End Fed kit is supplied with the antenna wire of your choice: Standard antenna wire: This antenna wire consists of 1.0 mm2 fine stranded copper conductor with black PVC insulation. The total diameter is approx. 2 mm. Ideal for experiments or vacation antennas. As the core is only made of copper, this stranded wire will become slightly longer and therefore thinner over time. The tensile strength of this stranded antenna wire is limited. LF Antenna Strand - New!: This high-quality antenna strand consists of 32 individual 0.20 mm wires made of hard-drawn, bare copper. The conductor cross-section is approximately 1.0 mm² and offers excellent conductivity combined with high mechanical strength. It has a total diameter of 2.1 mm, a weight of approx. 11 g/m, and a breaking load of about 40 kg. The robust black polyethylene (PE) insulation reliably protects the strand from environmental influences and ensures a long service life. The kit contains the following components: 1x toroidal core FT-140-431x enameled copper wire GR2 for winding the toroidal core (1mm) approx. 1.00 meter1x polycarbonate housing with transparent cover 100x100x60 mm (IP67)1x mini insulator 65 * 15mm2x simplex terminals up to 2 mm wire (wire rope terminal) 1x thimble approx. 23.5 meter antenna wire 1mm² black 1x capacitor 100pF 2kV DC 1x PL259 panel jack 1x extension coil 110uH ready wound and measured 1x shrink tube black 25.4-12.7mm 1x various screws, washers and nuts made of stainless steel 1x stainless steel ring 3x Fast-On ring contactType: MultibandLength: approx. 23 meters Connection: PL Max. Power: 100Watt PEP Phone Weight: approx. 500g Balun 1:49 Informationen gemäß Art. 19 GPSR Adresse des Herstellers:  Bonito - Gerichtsweg 3 - 29320 Hermmansburg - anfragen@bonito.net- www.bonito.net Adresse der verantwortlichen Person: Bonito - Gerichtsweg 3 - 29320 Hermmansburg - anfragen@bonito.net- www.bonito.net

End Fed multiband antenna DIY kit for 10-20-40m 300Watt PEP SSBNew extended kit! This kit contains all the necessary components to build an EndFed 1:49 multiband antenna for the bands 10-20-40meters up to 300 Watt PEP Phone. We have added a connection for the counterweight and the useful stainless steel ring etc. to the kit. This End Fed kit is supplied with the antenna wire of your choice: Standard antenna wire: This antenna wire consists of 1.0 mm2 fine stranded copper conductor with black PVC insulation. The total diameter is approx. 2 mm. Ideal for experiments or vacation antennas. As the core is only made of copper, this stranded wire will become slightly longer and therefore thinner over time. The tensile strength of this stranded antenna wire is limited. LF Antenna Strand - New!This high-quality antenna strand consists of 32 individual 0.20 mm wires made of hard-drawn, bare copper. The conductor cross-section is approximately 1.0 mm² and offers excellent conductivity combined with high mechanical strength. It has a total diameter of 2.1 mm, a weight of approx. 11 g/m, and a breaking load of about 40 kg. The robust black polyethylene (PE) insulation reliably protects the strand from environmental influences and ensures a long service life. The kit contains the following components: 1x toroidal core FT-240-431x enameled copper wire GR2 for winding the toroidal core (1mm) approx. 1.50 meters1x polycarbonate housing with transparent cover 100x100x60 mm (IP67)1x mini insulator 65 * 15mm2x simplex terminals up to 2 mm wire (wire rope terminal) 1x thimble approx. 23.5 meter antenna wire 1mm² black 1x capacitor 100pF 2kV DC 1x PL259 panel jack 1x extension coil 34uH ready wound and measured 1x shrink tube black 25.4-12.7mm 1x various screws, washers and nuts made of stainless steel 1x stainless steel ring 3x Fast-On ring contactType: MultibandLength: approx. 12 meters Connection: PL Max. Power: 300Watt PEP Phone Weight: approx. 600g Balun 1:49 Informationen gemäß Art. 19 GPSR Adresse des Herstellers:  Bonito - Gerichtsweg 3 - 29320 Hermmansburg - anfragen@bonito.net- www.bonito.net Adresse der verantwortlichen Person: Bonito - Gerichtsweg 3 - 29320 Hermmansburg - anfragen@bonito.net- www.bonito.net

Mini Endfed antenna kit, max 100 watts for 10-15-20-40 meters approx. 20 meters long, without extension coil.The Mini Endfed is a small End Fed antenna solution for portable use, when travelling, POTA, QRP, SOTA (Summit on the Air) or DX expeditions etc. The IP65 protected housing made of polycarbonate with a size of only 64x58x35 mm can be easily stowed in a pocket or backpack, but is also robust enough for stationary mounting. The weight is around 400-500 grams, depending on the length of the antenna. If you attach the antenna to the top of a telescopic mast and slide out the mast segments, you can be on air within a few minutes! To attach the housing of the 1:49 transformer to a mast, the same bracket can be used as for our active antennas. This Mini Endfed kit is supplied with an antenna wire of your choice:Standard antenna wire: This antenna wire consists of 1.0 mm2 fine stranded copper conductor with black PVC insulation. The total diameter is approx. 2 mm. Ideal for experiments or vacation antennas. As the core is only made of copper, this stranded wire will become slightly longer and therefore thinner over time. The tensile strength of this stranded antenna wire is limited. Copper/Kevlar stranded antenna wire This stranded antenna wire is specially manufactured for antennas. The stranded wire consists of a Kevlar core with approx. 1.1 mm2 tinned and fine-stranded copper conductors. 1x 0.4 mm Kevlar and 24x 0.25 mm copper. The sheathing is made of black UV-resistant PE. The total diameter is approx. 2.5 mm. The tensile strength is approx. 50 kg. You receive a strong, flexible and relatively light antenna strand. These complete Mini End Fed Multiband kits are designed for 100 Watt PEP Phone and are available in these versions: 10-15-20-40 meters approx. 20 meters long, without extension coil 10-20-40 meters, approx. 12 meters long, with 34uH extension coil 10-15-20-40-80 meters, approx. 21 meters long with 110uH extension coilThe kit contains the following components: approx. 20.45 meters of antenna wire 1x stainless steel cable clamp 1x end insulator 1x cable lug 5mm 1:49 Mini Impedance transformer: IP65 housing 64x58x35mm polycarbonate Toroidal core FT140-43 Enameled copper wire GR2 quality 1.00 mm 100 pF capacitor 2kV 1x BNC flange socket 2x M2.5 screws 8/10mm 2x M2.5 nut 2x M2,5 washer 1x cable lug 3mm 3x M5 cable lug 2x stainless steel M5 screw 20mm 2x stainless steel M5 wing nut 2x stainless steel M5 collar nut 2x stainless steel M5 toothed washer 2x stainless steel M5 screw 20mm 2x stainless steel M5 wing nut 2x stainless steel M5 collar nut 2x stainless steel M5 toothed washer 1x ring M4 1x toothed washer M4 1x nut M4 1x cable thimbleYou can find the assembly instructions here: LINK Informationen gemäß Art. 19 GPSR Adresse des Herstellers:  Bonito - Gerichtsweg 3 - 29320 Hermmansburg - anfragen@bonito.net- www.bonito.net Adresse der verantwortlichen Person: Bonito - Gerichtsweg 3 - 29320 Hermmansburg - anfragen@bonito.net- www.bonito.net

End Fed multiband antenna DIY kit for 10-20-40m 100Watt PEP SSBNew extended kit! This kit contains all the necessary components to build an EndFed 1:49 multiband antenna for the bands 10-20-40meters up to 100 Watt PEP Phone. We have added a connection for the counterweight and the useful stainless steel ring etc. to the kit. This End Fed kit is supplied with the antenna wire of your choice: Standard antenna wire: This antenna wire consists of 1.0 mm2 fine stranded copper conductor with black PVC insulation. The total diameter is approx. 2 mm. Ideal for experiments or vacation antennas. As the core is only made of copper, this stranded wire will become slightly longer and therefore thinner over time. The tensile strength of this stranded antenna wire is limited.  LF Antenna Strand - New! This high-quality antenna strand consists of 32 individual 0.20 mm wires made of hard-drawn, bare copper. The conductor cross-section is approximately 1.0 mm² and offers excellent conductivity combined with high mechanical strength. It has a total diameter of 2.1 mm, a weight of approx. 11 g/m, and a breaking load of about 40 kg. The robust black polyethylene (PE) insulation reliably protects the strand from environmental influences and ensures a long service life. The kit contains the following components: 1x toroidal core FT-140-431x enameled copper wire GR2 for winding the toroidal core (1mm) approx. 1.0 meters1x polycarbonate housing with transparent cover 100x100x60 mm (IP67)1x mini insulator 65 * 15mm2x simplex terminals up to 2 mm wire (wire rope terminal) 1x thimble approx. 23.5 meter antenna wire 1mm² black 1x capacitor 100pF 2kV DC 1x PL259 panel jack 1x extension coil 34uH ready wound and measured 1x shrink tube black 25.4-12.7mm 1x various screws, washers and nuts made of stainless steel 1x stainless steel ring 3x Fast-On ring contactType: MultibandLength: approx. 12 meters Connection: PL Max. Power: 100Watt PEP Phone Weight: approx. 550g Balun 1:49 Informationen gemäß Art. 19 GPSR Adresse des Herstellers:  Bonito - Gerichtsweg 3 - 29320 Hermmansburg - anfragen@bonito.net- www.bonito.net Adresse der verantwortlichen Person: Bonito - Gerichtsweg 3 - 29320 Hermmansburg - anfragen@bonito.net- www.bonito.net

New extended kit! This kit contains all the necessary components to build an EndFed 1:649 multiband antenna for the bands 10-12-15-17-20-(30*)-40-80-160 up to 300 Watt PEP Phone. We have added a connection for the counterweight and the useful stainless steel ring etc. to the kit. This End Fed kit is supplied with the antenna wire of your choice: Standard antenna wire: This antenna wire consists of 1.0 mm2 fine stranded copper conductor with black PVC insulation. The total diameter is approx. 2 mm. Ideal for experiments or vacation antennas. As the core is only made of copper, this stranded wire will become slightly longer and therefore thinner over time. The tensile strength of this stranded antenna wire is limited. LF Antenna Strand - New!This high-quality antenna strand consists of 32 individual 0.20 mm wires made of hard-drawn, bare copper. The conductor cross-section is approximately 1.0 mm² and offers excellent conductivity combined with high mechanical strength. It has a total diameter of 2.1 mm, a weight of approx. 11 g/m, and a breaking load of about 40 kg. The robust black polyethylene (PE) insulation reliably protects the strand from environmental influences and ensures a long service life. The kit contains the following components: 1x toroidal core FT-240-431x enameled copper wire GR2 for winding the toroidal core (1mm) approx. 1.80 meters1x polycarbonate housing with transparent cover 100x100x60 mm (IP67)1x mini insulator 65 * 15mm2x simplex terminals up to 2 mm wire (wire rope terminal) 1x thimble approx. 23.5 meter antenna wire 1mm² black 1x capacitor 100pF 2kV DC 1x PL259 panel jack 1x extension coil 34uH ready wound and measured 1x shrink tube black 25.4-12.7mm 1x various screws, washers and nuts made of stainless steel 1x stainless steel ring 3x Fast-On ring contactType: Multiband 1:64 Length: approx. 46 meters Connection: PL Max. Power: 300/600Watts PEP Phone Weight: ca 600g Info The measurements for this antenna were made on two 12m spider beam masts, 10 meters above the ground, in an open field, without any buildings. Informationen gemäß Art. 19 GPSR Adresse des Herstellers:  Bonito - Gerichtsweg 3 - 29320 Hermmansburg - anfragen@bonito.net- www.bonito.net Adresse der verantwortlichen Person: Bonito - Gerichtsweg 3 - 29320 Hermmansburg - anfragen@bonito.net- www.bonito.net

Mini Endfed antenna kit, max 100 watts for 10-15-20-40 meters approx. 20 meters long, without extension coil.The Mini Endfed is a small End Fed antenna solution for portable use, when travelling, POTA, QRP, SOTA (Summit on the Air) or DX expeditions etc. The IP65 protected housing made of polycarbonate with a size of only 64x58x35 mm can be easily stowed in a pocket or backpack, but is also robust enough for stationary mounting. The weight is around 400-500 grams, depending on the length of the antenna. If you attach the antenna to the top of a telescopic mast and slide out the mast segments, you can be on air within a few minutes! To attach the housing of the 1:49 transformer to a mast, the same bracket can be used as for our active antennas. This Mini Endfed kit is supplied with an antenna wire of your choice:Standard antenna wire: This antenna wire consists of 1.0 mm2 fine stranded copper conductor with black PVC insulation. The total diameter is approx. 2 mm. Ideal for experiments or vacation antennas. As the core is only made of copper, this stranded wire will become slightly longer and therefore thinner over time. The tensile strength of this stranded antenna wire is limited. Copper/Kevlar stranded antenna wire This stranded antenna wire is specially manufactured for antennas. The stranded wire consists of a Kevlar core with approx. 1.1 mm2 tinned and fine-stranded copper conductors. 1x 0.4 mm Kevlar and 24x 0.25 mm copper. The sheathing is made of black UV-resistant PE. The total diameter is approx. 2.5 mm. The tensile strength is approx. 50 kg. You receive a strong, flexible and relatively light antenna strand. These complete Mini End Fed Multiband kits are designed for 100 Watt PEP Phone and are available in these versions: 10-15-20-40 meters approx. 20 meters long, without extension coil 10-20-40 meters, approx. 12 meters long, with 34uH extension coil 10-15-20-40-80 meters, approx. 21 meters long with 110uH extension coilThe kit contains the following components: approx. 20.45 meters of antenna wire 1x stainless steel cable clamp 1x end insulator 1x cable lug 5mm 1:49 Mini Impedance transformer: IP65 housing 64x58x35mm polycarbonate Toroidal core FT140-43 Enameled copper wire GR2 quality 1.00 mm 100 pF capacitor 2kV 1x BNC flange socket 2x M2.5 screws 8/10mm 2x M2.5 nut 2x M2,5 washer 1x cable lug 3mm 3x M5 cable lug 2x stainless steel M5 screw 20mm 2x stainless steel M5 wing nut 2x stainless steel M5 collar nut 2x stainless steel M5 toothed washer 2x stainless steel M5 screw 20mm 2x stainless steel M5 wing nut 2x stainless steel M5 collar nut 2x stainless steel M5 toothed washer 1x ring M4 1x toothed washer M4 1x nut M4 1x cable thimbleYou can find the assembly instructions here: LINK Informationen gemäß Art. 19 GPSR Adresse des Herstellers:  Bonito - Gerichtsweg 3 - 29320 Hermmansburg - anfragen@bonito.net- www.bonito.net Adresse der verantwortlichen Person: Bonito - Gerichtsweg 3 - 29320 Hermmansburg - anfragen@bonito.net- www.bonito.net

Mini Endfed Antennenbausatz, für 10-20-40m mit Verlängerungsspule, max 100Watt PEP Die Mini Endfed ist eine kleine End Fed Antennen Lösung für den Portabeleinsatz,, auf Reisen, QRP, SOTA (Summit on the Air) oder DX Expeditionen usw. Das IP65 geschütze Gehäuse aus Polcarbonat, hat eine Größe von nur 64x58x35 mm und lässt sich leicht in der Tasche oder im Rucksack verstauen, ist aber auch robust genug für die stationäre Montage. Das Gewicht beträgt etwa 400-500 Gramm. Der Bausatz hat sowohl einen Anschluss für die ANTenne als auch GND für ein Gegengewicht. Den M4 Ring haben wir ebnso integriert. Damit lässt sich die Mini Endfed ganz einfach mit einem Karabiner befestigen und mit der Kausche als Zugentlasung vewenden. Alle Schrauben, Muttern und der Ring sind aus Edelstahl. Befestigt man die Antenne an der Spitze eines Teleskopmast, schiebt die Mastsegmente heraus, ist man innerhalb von wenigen Minuten auf Sendung! Um das Gehäuse des 1:49 Transformers an einem Mast zu befestigen, kann die gleiche Halterung wie von unseren Aktivantennen verwendet werden.  Dieser Mini Endfed-Bausatz wird mit einem Antennendraht Ihrer Wahl geliefert: Standard Antennenlitze:Diese Antennenlitze besteht aus 1,0 mm2 feindrähtiger Kupferleiter mit einer schwarzen PVC Isolierung. Der Gesamtdurchmesser beträgt etwa 2 mm. Ideal für Experimente oder Urlaubsantennen. Da der Kern nur aus Kupfer besteht, wird sich diese Litze mit der Zeit immer etwas längen und somit dünner werden. Die Zugfestigkeit dieser Antennenlitze ist begrenzt. LF-Antennenlitze - Neu! Diese hochwertige Antennenlitze besteht aus 32 Einzeldrähten à 0,20 mm aus hartgezogenem, blankem Kupfer. Der Leiterquerschnitt beträgt ca. 1,0 mm² und bietet hervorragende Leitfähigkeit bei gleichzeitig hoher mechanischer Festigkeit. Sie hat einen Gesamtdurchmesser von 2,1 mm, einem Gewicht von ca. 11 g/m und einer Bruchlast von etwa 40 kg. Die robuste Polyethylen-Isolation (PE) in schwarz schützt die Litze zuverlässig vor Umwelteinflüssen und sorgt für eine lange Lebensdauer In diesem Bausatz sind alle nötigen Bauteile zum Bau einer Mini EndFed Multiband Antenne für die Bänder 10-20-40 Meter bis100 Watt PEP Phone enthalten. Der Bausatz enthält die folgenden Bauteile:  ca. 12 Meter AntennendrahtVerlängerungsspule mit ca: 34uh (fertig gewickelt und vermessen)1x Edelstahl Kabelklemme1x Endisolator1x Kabelschuh 5mm1x Schrumpfschlauch 1:49 Mini Impedanztransformator: IP65-Gehäuse 64x58x35mm PolycarbonatRingkern FT140-43Kupferlackdraht GR2 Qualität 1,00 mm100 pF Kondensator 2kV1x BNC-Flanschbuchse2x M2,5 Schrauben 8/10mm2x M2,5 Mutter2x M2,5 Unterlegscheibe1x Kabelschuh 3mm3x M5 Kabelschuh2x Edelstahl M5 Schraube 20mm2x Edelstahl M5 Flügelmutter2x Edelstahl M5 Kragenmutter2x Edelstahl M5 Zahnscheibe2x Edelstahl M5 Schraube 20mm2x Edelstahl M5 Flügelmutter2x Edelstahl M5 Kragenmutter2x Edelstahl M5 Zahnscheibe1x Ring M41x Zahnscheibe M41x Mutter M41x Kabelkausche Die Bauanleitung finden Sie hier: ZUR BAUANLEITUNG    ** Die Bauanleitung bekommt gerade noch ihren Feinschliff

Mini Endfed Antenna Kit for 10-15-20-40-80m, max 100 Watts PEP and 1:49 Transformer The Mini Endfed is a small endfed antenna solution for mobile use, travel, QRP, SOTA (Summit on the Air) or DX expeditions etc. The IP65 protected polar carbonate housing with a size of only 64x58x35 mm, can be easily stored in your pocket or backpack. The weight is about 250-500 grams, depending on the length of the spotlight. The kit has both a connector for the ANTenna and GND for a counter poise capacitance. We have also integrated the M4 ring. This makes it very easy to attach the Mini Endfed with a carabiner and use the thimble as a strain relief. All screws, nuts and the ring are made of stainless steel. If you attach the antenna to the top of a telescopic mast and slide out the mast segments, you are on the air within minutes! To attach the body of the 1:49 Transformer to a mast, you can use the same bracket as used by our active antennas. This End Fed Multiband Antenna comes with the antenna wire of your choice: Standard Antenna wire: This antenna litz wire is made of 1.0 mm2 fine stranded copper conductor with a black PVC insulation. The total diameter is about 2 mm. Ideal for experiments or vacation antennas. Since the core is only copper, this stranded wire will always elongate a bit over time, making it thinner. The tensile strength of this antenna strand is limited. Copper/Kevlar antenna litz wire This antenna litz wire is manufactured specifically for antennas. The litz consists of a Kevlar core with approx. 1.1 mm2 tinned and fine stranded copper conductors. 1x 0.4 mm Kevlar and 24x 0.25 mm copper. The jacket is made of black UV-resistant PE. The total diameter is approx. 2.5 mm. The tensile strength is approx. 50 kg. You will receive a strong, flexible and relatively light antenna litz wire. These complete Mini End Fed Multiband kits are designed for 100 Watt PEP Phone and are available in these configurations: 10-20-40 meters approximately 20 meters in length, without extension coil.10-20-40 meters, approx. 12 meters length, with 34uH extension coil10-15-20-40-80 meters, approximately 21 meters in length with 110uH extension coil. This kit contains: 23 meters of antenna wire19 mm PVC pipe with approx: 110uh coil1x stainless steel cable clamp1x end insulator1x cable lug 5mm1x heat shrink tubing 1:49 Mini impedance transformer:IP65 housing 64x58x35mm polycarbonateFerrite toroid Amidon FT140-43Winding wire 1,00 mm100 pF capacitor 1kV1x BNC flange socket2x M2,5 screws 8/10mm2x M2,5 nut2x M2,5 washer1x cable lug 3mm3x M5 cable lug2x stainless steel M5 screw 20mm2x stainless steel M5 wing nut2x stainless steel M5 collar nut2x stainless steel M5 lock washer2x stainless steel M5 screw 20mm2x stainless steel M5 wing nut2x stainless steel M5 collar nut2x stainless steel M5 tooth lock washer1x ring M41x tooth lock washer M41x nut M41x cable thimble You can find the building instructions here: TO THE CONSTRUCTION INSTRUCTION ** The construction manual is just getting its fine tuning

1 – 30 MHz Common mode filter with bifilaire windings for optimal attenuation There are many types of common mode chokes available, HF Kits opts for a common mode choke with bifilar windings for optimal filtering. This 1 – 30 MHz common mode current filter is optimized for the 80 and 160 meter band. In this case a FT240-31 toroidal core with optimal performance for the lower frequency range is used. The 1 – 30 MHz common mode choke performs very well on the entire HF spectrum. The attenuation is therefore around 30 dB across the entire HF frequency spectrum. This filter is therefore a real all-rounder for amateurs who want to work from 160 meters to 10 meters. Even people who deal with LPAM (Medium Wave) can use this filter. The main reason for using a common mode choke is to ensure that the coax cable’s shield does not become part of the antenna system and will radiate unintentionally. This has all sorts of nasty effects, think of: interference issues, disrupted radiation pattern of the antenna and a higher noise level. This last point is because not only does the coax cable’s shield radiate when you transmit, but the shield also works as a receiving antenna. Because the coax cable often makes a considerable trip within the house, close to interference sources (mains, PLC etc…) It is useful to eliminate these sources of interference. Any way, Good reason to use a common mode choke. The effect of this common mode choke with bifilar windings is difficult to predict. This depends on local circumstances. Think of: antenna type, antenna placement, type of feed line, feed line placement and especially local sources of interference. There are manufacturers that promise in advance a significant drop in interference, however this is not real. There are cases where the noise level decreases by two to three S points, but also cases where the filter has almost no effect. This kit includes: IP65 enclosure 100 x 100 x 55 mm (Polycarbonat) Ringcore Amidon FT240-31 Winding wire 18 AWG – 4x 85cm PTFE 19 x 0.25 mm copper “Silver plated” Toroid mounting plate Stainless steel M3 6mm screws 4x Stainless steel M3 Spring washer 4x 2x PL 259 Chassis 2x M3 cable lug 8x Stainless steel M3 Bolt 12mm 8x Stainless Steel M3 Nut 8x Stainless steel M3 washer 8x Stainless steel M3 tooth washer IMPORTANT! Do not place the common mode choke in case of an End Fed antenna directly at feed point of the antenna.Construction Manual in Englisch

1 – 30 MHz Common mode filter with bifilaire windings for optimal attenuation There are many types of common mode chokes available, HF Kits opts for a common mode choke with bifilar windings for optimal filtering. This 1 – 30 MHz common mode current filter is optimized for the 80 and 160 meter band. In this case a FT240-31 toroidal core with optimal performance for the lower frequency range is used. The 1 – 30 MHz common mode choke performs very well on the entire HF spectrum. The attenuation is therefore around 30 dB across the entire HF frequency spectrum. This filter is therefore a real all-rounder for amateurs who want to work from 160 meters to 10 meters. Even people who deal with LPAM (Medium Wave) can use this filter. The main reason for using a common mode choke is to ensure that the coax cable’s shield does not become part of the antenna system and will radiate unintentionally. This has all sorts of nasty effects, think of: interference issues, disrupted radiation pattern of the antenna and a higher noise level. This last point is because not only does the coax cable’s shield radiate when you transmit, but the shield also works as a receiving antenna. Because the coax cable often makes a considerable trip within the house, close to interference sources (mains, PLC etc…) It is useful to eliminate these sources of interference. Any way, Good reason to use a common mode choke. The effect of this common mode choke with bifilar windings is difficult to predict. This depends on local circumstances. Think of: antenna type, antenna placement, type of feed line, feed line placement and especially local sources of interference. There are manufacturers that promise in advance a significant drop in interference, however this is not real. There are cases where the noise level decreases by two to three S points, but also cases where the filter has almost no effect. This kit includes: IP65 enclosure 100 x 100 x 55 mm (Polycarbonat) Ringcore Amidon FT240-31 Winding wire 18 AWG – 4x 85cm PTFE 19 x 0.25 mm copper “Silver plated” Toroid mounting plate Stainless steel M3 6mm screws 4x Stainless steel M3 Spring washer 4x 2x PL 259 Chassis 2x M3 cable lug 8x Stainless steel M3 Bolt 12mm 8x Stainless Steel M3 Nut 8x Stainless steel M3 washer 8x Stainless steel M3 tooth washer IMPORTANT! Do not place the common mode choke in case of an End Fed antenna directly at feed point of the antenna.

Complete 1:4 BalUn DIY kit for off-center-fed (windom) antennas, among other things. 1:4 BalUn 600 Watt self-build kit 1.8 – 30 MHz, with solid strain relief. This 1:4 BalUn is constructed from two FT240-43 ferrite toroidal cores. On the first toroidal core a 1:1 current BalUn is built up. It takes care of the transition from unbalanced (coax) to balanced antenna. This BalUn has a fantastic common mode current attenuation of over 30 dB. The second toroid is responsible for impedance adjustment from 50 ohms to 200 ohms. Many BalUn manufacturers only look at the impedance matching but forget to look at the common mode current attenuation. This BalUn scores very well on both levels. Now with a handy mounting plate to attach both ring cores, so gluing is no longer necessary. The 1:4 BalUn 600 Watt can be used for off-center-fed antennas, among other things. The off-center-fed antenna (windom) is a popular multiband antenna. These antennas have many advantages. The antenna can be used on many bands, the antenna is often easy to place due to the 1/3, 2/3 ratio in the antenna legs. By using a good BalUn, Common mode current are prevented, which also reduces interference from your direct environment. This antenna needs no ground or counter capacitance. The main reason for using a BalUn is to make sure that the coax cable is not part of the antenna system and that it will radiate undesirable. This has all sorts of nasty effects, think of: interference, EMI, RFI disrupted radiation pattern of the antenna, restless noise level. This last point is because not only does the coax cable’s shield radiate when you transmit, but the shield also works as a receiving antenna. 1:4 BalUn 600 watt components This kit includes: IP65 enclosure 100x100x55 mm 2x Ferrite Ring Core Amidon FT240-43 Winding wire 18 AWG – 8x 85cm PTFE 19 x 0.25 mm copper “Silver plated” PL 259 Chassis Toroid mounting plate 4x M3 spacer 4x Stainless steel M3 6 mm screws 4x stainless steel M3 washer M3 Cable lug 2x M5 Cable lug 2x stainless Steel (A4) M6 eye (Strain relief) 2x Stainless Steel M6 Nut 2x Stainless steel M6 washer 2x stainless steel M6 Spring washer 2x Stainless Steel M5 Bolt 25mm 2x stainless steel M5 wing nut 4x Stainless Steel M5 Nut 4x Stainless steel M5 washer 2x stainless steel M5 Spring washer 4x stainless steel M5 toothed washer 4x stainless steel M3 Bolt 12mm 4x Stainless Steel M3 Nut 4x Stainless steel M3 washer 4x stainless steel M3 toothed washer