G Whip Designed Current Baluns:

Commercial Products: Real Prices!

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G Whip design and manufacture a range of 2 to 30MHz current baluns including 1/1 Choke baluns, and 2.5/1, 4/1, 6/1, 9/1, 12/1 and 16/1 Guanella baluns. The units are of the highest quality you will find and are made from top quality components. We only use top quality materials in production like PTFE coated wire which is Mil Def Std 210 along with PTFE sleeving in some cases and/or Mil spec’ PTFE coax. Multi core for multi ratio! True Guanella units.

Extensive tests are carried out using our Fluke Thermal unit and Expert 1kw Solid-state amplifier, we get good Z Mag performance/high attenuation on the CMC 1/1 chokes with superb matching with no heating of the cores on all models.

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The cores we use are not made of Iron Powder, we use specially selected mixes of Manganese, Zinc and Nickel types.

Face up to it that Iron Powder cores can be lossy, in fact measurements prove a loss of some 2 to 3db in certain configurations and that means half of your precious power is lost in HEATING of the core. Power levels up to 5000 watts pep can be offered with our custom made cores. Special configurations can be made at very little extra cost but due to resin mixes we cannot just make a one off, a special would have to be made with a running batch. All nuts/bolts and strain reliefs are made of stainless steel. These units are the best you will find.

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All our products are tested with REAL power (above 1kw amplifier which we have an NOV to use on air) and professional test equipment and has RoSH EC compliance.

Several types of connectors are available to order, 7/16″: 7/8″: HN Type: “N” Type: SO239

REMEMBER ALSO THAT A 1/1 BALUN PROPERLY BUILT MAY HELP REDUCE NOISE ON RECEIVE SYSTEMS.

Finally, all our units are resin potted, if it’s not resin potted then don’t buy it despite what the seller says about “IP65 waterproof boxes?”, it’s going outside up in the air and the Sun WILL crack the box unless it is UV protected, once that happens water will flood in and then it is useless. 

So, here we go with CMC which means COMMON MODE CHOKES or LINE ISOLATORS…………See below.

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GWDP: Above is our full legal power dipole centre with 1/1 common mode choke installed, UV protected case, Ceramic insulators, Top mounting A4 eye, Stainless steel strain reliefs for lines and coax, will handle 400 watts, PTFE coax wound rod, PTFE SO239 or “N” type if required, fully potted, will last forever! Fabulous unit and weighs just 350/400 grams:

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GWB1: Above is our 250 watt pep (tested @ 500 w pep) 1/1 Common Mode Choke balun, it is made using top quality materials and wound with PTFE coax, the sockets are high quality PTFE and the whole unit is potted in resin, has reasonable zMag over the HF spectrum

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GWB2: Above is another 1/1 Choke balun (CMC) by G Whip, it is wound on a mega size 63mm custom made core with PTFE coax and rated at 400 w pep. SO239 > SO239 sockets are used (Special order for “N” type sockets) The winding is exceptionally good at 160/80/40 mtrs and offers good Zmag over those bands

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GWB3: BIG BOY BLACK BOX ( 17 x 10 x 6 cms): Above is another G WHIP 1/1 Choke balun (CMC), it is wound on a 63 mm custom made core with PTFE RG303 coax and has been tested at 5000 w pep on a big Henry amplifier. PTFE SO239 sockets are used or you can have “N” type sockets, it will cure most problems.

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GWB4: Above is another G Whip SPECIAL design 1/1 Choke balun (CMC), it is our best one, it is wound on a very special custom made core with PTFE coax and has been tested at 500 w pep. PTFE SO239 sockets (Special order for “N” type sockets) are used or SS bolts can be fitted on one end if required, superb strong case with full IP65 rating and outer rubber gasket, even the screws have seals fitted to them, fully potted, superb in stopping returned RF. Read the G Whip balun comments on eHam! The return rf attenuation is 36 to 48db, see below.

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The above is really superb and the best for 7 to 30MHz, common mode currents are eliminated by an average of -40db, even -30db @ 3MHz and -22db @ 2MHz……………..G Whip…………….simply the best!

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GWB5 Below……………..MEGA unit

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GWB5 Above: Built around TWO 85mm super cores and wound with MIL PTFE RG 303 Coax, this CMC 1/1 is rated @ 3000 watts (with “N” type connectors) or 2000 watts with PTFE SO239 sockets: Box size 170 x 110 x 60 mm: Fully potted for outdoor use: weight is 1.4 kgs packed

GWB6/7/8: These CMC versions (Common Mode Chokes) offer high zMag along with near matching R/C/I. The individually wound cores are cascaded for optimum returned rf rejection on low/medium and high HF bands. Boxed and potted you can have a single core, 2 split cores, 3 split cores or 4 split cores in one box………..here’s a few samples below, sweeps and others will follow when time permits.

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Various Ratios Guanella Current Baluns:

Commercial Quality:

Below are Guanella current baluns, they are all made with multiple cores as you cannot make a Guanella muti ratio balun on a single core. We can offer lots of different options including different ratios and power levels, they are mainly used for OSCD/Windoms/Doublets, Loops and other types of balanced line antennas. 2.5/1: 4/1: 6/1: 9/1: 12/1: 16/1: etc etc

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2.5/1 50 to 125 Ohms Guanella Balun!

The Ultimate Skyloop Balun

Just look at these units below

This new unit is based on our very popular and top selling 4/1 true Guanella multi-core current balun unit. Made from the same top quality cores of Ni/Zn and wound with PTFE Mil DEF 210 standard wire. A superb transformation from 50 ohm unbal to 125 ohms for balanced lines (Sky Loops).

2.5/1 Guanella Current balun, Multi Ni/Zn cores, PTFE wire wound, SO239, Stainless steel fittings, M6 Stainless Steel top eye for mounting, fully resin potted in custom made UV protected enclosure.

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Sample of flat top sky loop for 10Mtrs 12 + 12 + 12 foot top and sides. Courtesy of Dave G6RRL! Perfection!

Supplied with FREE:

Insulators: Thimbles for lines and wire locks: Solder tags and heatshrink: Self Amalgamating tape

PTFE SO239 socket, stainless steel posts and strain relief hooks for the balanced lines and fully resin potted. Superb for those loop designs requiring 125 ohm balanced line. Power rating of 250w.

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4/1 50 to 200 Ohms Guanella Balun!

Just look at these units below

4/1 Guanella Current balun, Multi Ni/Zn cores, PTFE wire wound, SO239, Stainless steel fittings, M6 Stainless Steel top eye for mounting, fully resin potted in custom made UV protected enclosure.

Supplied with FREE:

Insulators: Thimbles for lines and wire locks: Solder tags and heatshrink: Self Amalgamating tape

Click the picture for a larger view.

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The units are CURRENT baluns which all use multiple NON iron powder cores.

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4/1 Guanella balun sweep using multi cores!

NO IRON POWDER CORES ARE USED IN ANY OF OUR DESIGNS.

Please note that the following units are TRUE current baluns, they are multiple windings on multiple cores, and not VOLTAGE baluns. All the units have a static drain fitted to filter out/earth any static charges. All units are fully resin potted and include an individual sweep/serial number for commercial customers ! Power rating of 250w.

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6/1 50 to 300 Ohms Guanella Balun!

 and 9/1 50 to 450 Ohms: 12/1 50 to 600 Ohms or 16/1 50 to 800 Ohms

Just look at these units below

6/1 Guanella Current balun, Multi Ni/Zn cores, PTFE wire wound, SO239, Stainless steel fittings, M6 Stainless Steel top eye for mounting, fully resin potted in custom made UV protected enclosure.

Supplied with FREE:

Insulators: Thimbles for lines and wire locks: Solder tags and heatshrink: Self Amalgamating tape

Click the picture for a larger view.

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The units are CURRENT baluns which all use multiple NON iron powder cores.

NO IRON POWDER CORES ARE USED IN ANY OF OUR DESIGNS.

Please note that the following units are TRUE current baluns, they are multiple windings on multiple cores, and not VOLTAGE baluns. All the following units have a static drain fitted to filter out/earth any static charges. All units are fully resin potted! Power rating of 250w.

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Below: Is the larger unit for 400 watts (4/1), these are used in our heavy duty OSCD/Windoms and Doublets. Also available with ceramic insulators.

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Above: G Whip designed using quality PTFE wire 4/1 Guanella current balun, Multi multi core wound with PTFE wire in PTFE sleeve, resin potted in 3.5mm thick wall IP rated UV protected box with stainless steel strain relief for coax and PTFE SO239 socket plus suspension hook, rated at 400 watts pep. The best you will find!, ideal for Windoms/OSCD and Doublets, has strain reliefs for ladder line or off set lines and a mega stainless support eye on the top of the box, size is 100 x 65 x 45mm supplied with FREE thimbles and stainless steel wire locks.

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Above is our 1000 watt pep unit, UV protected enclosure, M6 top support eye, stainless steel side strain reliefs, PTFE SO239 or “N” type socket (special order), 4 Ni/ZN cores wound with PTFE Mil grade wire, ceramic insulators and FULLY RESIN POTTED!, comes with thimbles/SS wire locks etc.

AVAILABLE NOW!