InnovAntennas C 140
7MHz (40 metre) Rotary dipole
Part Number: Z08564-0005
Rotary dipole for 40m (7MHz)
The Delta C-140 has a number of unique benefits. First it covers the whole 40m band without an ATU with an SWR of less than 1.6:1, this is not a characteristic that most "short" dipoles provide. Next is the combination of capacity and coil loading.
Coil loading is a required aspect of many lower HF antennas but is not by any means efficient. Additionally, the closer any coils are to the dipole centre, the more inefficient they become (and the narrower their bandwidth). Capacity loading is the most efficient loading method but typically is not capable of reducing elements by more than a few percent.
Justin G0KSC has combined the use of high-efficient, wide-spaced coils and capacity loading to produce a 12m wide 40M rotating dipole with a radiating efficiency of just over 89% along with all-band coverage without the need for an ATU.
The capacity loading has allowed for the coils to be moved further out along the element lengths to improve efficiency and bandwidth and the solid structure with fast taper ensures no guying is needed as the antenna can fully support its own weight.
The centre of the antenna is 50mm diameter tapering to 19mm at the capacity loaded side of each element and the capacity loading spokes are 6.4mm diameter solid rod.
The Delta C-140 has avoided the narrow-banded mistakes of other competitiv products by combining loading methods and shifting them further out on the element structure. This is combined within a very high quality mechanical package that uses marine grade stainless steel components throughout, provides a 40m dipole that is truly second to none.
If you want the very latest in highly efficient, short-dipole technology look no further than the InnovAntennas Delta C-140.
- Antenna width: 12m
- Turing Radius: 5.7m
- Effective Wind area: 0.4M2 (4.6 Square Feet)
- Antenna Weight: 7.5 Kilos
Product Dimensions and Weight
- Product Length: 13.0000M
- Product Weight: 8.5000KG
- Units in box: 1
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