JQ2UOZ's QRPp DX: Antennas used in the Years 2006-2009

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Dipoles Mounted on My 11th Floor Balcony

In the years 2006-2009, I lived at an 11-story apartment building, and used dipole antennas mounted on the 11th-floor balcony (In early 2011, I moved to my new QTH).

40m (7MHz): a dipole (Element Length: 10.6m; Gain: minus 5dB) (Radix RDL-4015):
A photo of the dipole mounted on the balcony:

17m (18MHz), 15m (21MHz), 12m (24MHz) and 10m (28MHz): a full-size dipole (Radix RDL-2000).
A photo of the dipole mounted on the balcony:

It is about 4 to 7 meters above the balcony floor and about 37 to 40 meters above the ground, depending on the length of the telescopic pole.

This dipole antenna is rotatable by manually rotating the pole.

RDL-2000 can be used on any one band of 10 to 20 meters as a full-size dipole by manually adjusting the length of the element.

This element is readily removable from the pole, which can readily be shortened.

The element is removed when I am not QRV.

QRV IN CONTESTS
Using the above 7MHz antenna (Radix RDL-4015), I was QRV in the CQWW 2008 CW contest in the QRP category.
The results of the contest are as follows.

Date: Nov. 29-30, 2008
Band: 40m (7MHz)
Mode: CW
My Power: 5 watts (equivalent to running 1.6 watts to a full-size dipole)
My Antenna: Dipole (Radix RDL-4015)(Element length: 10.6m; Gain: minus 5dB; Height: about 40m above the ground)

World No. 4 in 7MHz QRP
New Japan Record (at that time)(Click to enlarge)

QSOs: 226
Zones: 24 (Zones 1, 3, 4, 5, 10, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 27, 28, 29, 30, 31 and 32)
DXCC Entities: 61 (4L, 4O, 4X, 5B, 8Q, 9A, 9M2, 9M6, BV, BY, CX, DL, DU, E7, EA6, ER, EU, GM, HA, HB, HC8, HL, I, JA, JT, KH0, KH2, KH6, KL7, LA, LU, LY, LZ, OA, OE, OH, OH0, OK, OM, S5, SM, SP, SV9, T8, TA, UA (AS), UA(EU), UJ, UN, UR, V7, VE, VK, VR2, W, YB, YL, YO, YU, Z3 and ZL)

In addition, I was QRV in the Ukrainian DX Contest.
You can watch a video showing some of my QSOs in the contest.

Date: Nov. 7, 2009.
Band: 40m (7MHz)
Mode: CW
My output power: 5 watts QRP (equivalent to running 1.6 watts to a full-size dipole)
My transceiver: Icom IC-7000S (Its maximum 100% power: 10 watts).
My antenna: Dipole (the above Radix RDL-4015)(Element length: 10.6m; Gain: minus 5dB; Height: about 40m above the ground)

Further, I was QRV in the LZ (Bulgaria) DX Contest.
You can watch a video showing some of my QSOs in the contest.

Date: Nov. 22, 2009.
Band: 15m (21MHz)
Mode: CW
My output power: 0.5 watts (500mW) QRPp
My transceiver: Icom IC-7000S (Its maximum 100% power: 10 watts).
My antenna: Dipole (the above Radix RDL-2000) (Full size; Height: about 40m above the ground)

Please note that the years 2006-2009 were the bottom of the sunspot cycle.

You can watch my other videos in My YouTube.

Please see also:
QRPp DXCC (with 500 milliwatts and dipoles) During the Sunspot Cycle Minimum:
My Challenge and My Additional Challenge
These Challenges were achieved using the above antenna (RDL-2000).

Photos of the Antenna (Click to enlarge)

Simulation of My Dipoles for 15m and 17m Bands Using EZNEC Demo v. 5.0
(https://www.eznec.com/)

Almost the same results were obtained using MMANA-GAL.

My dipole for 15m band which is 40m above the ground: