G Whip UN/UNs

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G Whip make 4/1 and 9/1 un/uns in various power options, they are designed by us and built by us.

READ THIS LINK PAGE 

The above link shows you the real side of what junk is being sold around the UK, poorly made power wasting baluns and un/uns, most of which are horribly built by people with little or no knowledge of RF techniques.

4/1 un/un Versions:

Here is the new mini 4/1 un/un unit, absolute perfection, the sweep is just bouncing around – 32 db return loss (NOT IRON POWDER CORE). The core is custom made for us and is wound with MIL spec PTFE wire, it is outstanding for an un/un transformer. 100 watts stainless steel posts with solder tags and heatshrink and ss strain reliefs all potted in a special resin make this unit the best you will ever see.

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.…………………………New 250 watt version of above 4/1 un-un now available……….

Below is our 4/1 voltage un/un

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Above is our 4/1 un/un, the same as the 4/1 voltage balun just wired in a different configuration, will handle 500 w pep. Totally potted this unit has even been tested in a bucket of water. Dual ptfe wires in a single ptfe sleeve on a custom made core keeps the impedance constant.

New Product Feb 2015!!

Several people asked for a higher power version of our PTFE 4/1 built UN/UN.

PFTE heavy gauge wire in a PTFE sleeve on mega size dual custom made cores and fibre glass tape wound: These units are superb in every way, they are fully protected for any weather you want to throw at them. The resin potted boxes (17 cms x 10 cms x 63 cms) have 3.5mm walls and are UV protected, they have 3 x 6mm Marine A4 stainless eyes to support the unit and the transmission lines. 6mm stainless steel bolts with solder tags and dome nuts are fitted at each end of the box for the lines. A PTFE SO239 socket handles the power input (“N” sockets available) and has a condensation vent at the side along with coax strain relief. Each unit weighs approx. 1.2 kgs, these are REAL commercial baluns and have been tested @ 1500 w pep on 200 ohm loads.

Take a closer look at the 3 markers on the spectrum analyser sweep.

Click on any of the pictures for an in depth view

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You get all the bits including the “Wire locks” and thimbles to secure the transmission lines to the “Stainless Steel Eyes” with this unit.

Stainless Steel wire locks supplied FREE with this unit

 

Click on any of the pictures for an in depth view

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Click on any of the pictures for an in depth view

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Click on any of the pictures for an in depth view, double click to magnify the picture

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Check the 3 plots of return loss and VSWR 3 – 30MHz

Click on any of the pictures for an in depth view

 

9/1 un/un Versions:

Below is our mini 9/1 un/un rated at 250 watts, PTFE wire on custom made multi cores fibre glass tape wound, PTFE SO239 socket, stainless steel fittings, solder tags and a superb sweep! It is resin potted which makes it full IP66 rated and built correctly to MIL 810 requirements. Comes with wire locks/insulators etc.

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Here’s the sweep of the above unit which by using the correct materials a sweep centered on 15MHz and +/- 15Mhz (total sweep is 0 to 30MHz) shows that even at 1.8MHz the VSWR is 1.3/1 and the same @ 30MHz, no IRON POWDER CORES are used!

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The secret of success on a 9/1 un/un is NOT to use poor quality cores and poor quality wire, if you use the right multi cores and MIL spec wire you can get remarkable results over the 2 to 30MHz spectrum. Professional return loss measurements can be as high as -35db

 

Below is our superb 9/1 un/un rated at 500 watts, PTFE wire wound on a custom made core (NOT IRON POWDER). We use this unit in our WIDEBANDER antenna which gets rave reviews from around the World.  Core is potted, condensation vent, stainless steel bolts/dome nuts and strain reliefs and PTFE SO239 socket. Includes Marine A4 stainless steel EYE bolt at top of box for mounting. Check it out on YouTube (G4ICD 9/1 un/un).

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Unbeatable workmanship, Professionally made! and no lossy Iron Powder cores!!

NEW PRODUCT! FEB 2015!!

Another addition to the matching transformer range is our 9/1 un/un. DUAL Mega custom made cores fibre glass tape wound with PTFE wire and rated @ 1000 watts. This is a real mother of un/un units.  Enclosure size is 130 x 65 x 55 mm with 3.5mm wall thickness. Top of unit has a A4 6mm stainless steel eye bolt for supporting the box, the sides have the same type of stainless steel A4 eye bolts to support the transmission lines. SO239 or “N” type socket (PTFE) and coax strain relief support. Fully potted in resin to protect the unit.

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Stainless steel wire locks and thimbles supplied for your lines, a truly professional product

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The Dual cores are some 45 mm high, really heavy duty non iron powder types

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Sweep is 0 to 30MHz, below is our MEGA dual core 9/1 un/un PTFE wire in PTFE tube, it is MASSIVE!

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