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Project MicroVert Antennas



The MicroVert antenna, designed by Juergen Schaefer, DL7PE, is a short, base loaded antenna that uses the coax shield as a counterpoise. Of course, this antenna is probably not the right choice for the DX-Hunter, but a very cheap, small and easy to build antenna and ideal for travelling and portable operation.

The following pictures shows my first version for 7 MHz and 14 MHz. The antennas body is made out of a 16.5mm diameter PVC tube used for electrical installation. The radiator is made of 20mm x 1.5mm aluminium tube.
One antenna can be manufactured within less than one hour.

A first test with the 14 MHz version mounted in my basement (2m below ground level!) shows reception reports about 3 S-units below my 5/8-lambda vertical. Contacts with YU, UA3, 4L8 and EA9 were easily made at first call with 100 W output.

More pictures, results and SWR-curves to come soon...




English Description by DL7PE
[1.0 MB]
Metric Calculator by AC9TS [40 kB]




MicroVert antennas for

left: 14 MHz, total length 65cm (26inch)
right: 7 MHz, total length 100cm (39inch)

14 MHz coil
(1mm CuL for 100W Tx power)

Clamp for fast vertical or horizontal mounting





Adjustment Element (8mm diam.)
(not necessary if antenna is designed correctly)

RF-Choke
50 Ohm / 1:1 / RG316 / FT-140-43





VSWR of the 14 MHz Version, measured Indoor. No tuning necessary for the whole band.



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