(1) Vertical multiband antenna 10/13/15/17/20/30/40/80m bands. Antenna is based on Butternut HF9V design.
(2)
Multiband beam Cushcraft MA5B - 10/15/20m
band works as 2 element beam, 13/17m as rotary dipole.
Antenna is about 5.5 meters above flat roof. Roof of the building is about 23 meters
above the street, but the building is made from concrete and iron. Therefore efficient distance between
antenna and virtual electrical ground is big unknown variable. Many people warned me not to have big expectations. Fortunately
practical results are better than I expected. Forward gain of antenna compared to vertical antenna for DX is usually
1S - even at 20m band. (Higher bands work with higher gain.) Other advantages of directional beam are obvious.
I can recommend that antenna. It is relatively small (acceptable size for building owner) and works well.
Mainly used with 5w-100w tranceiver Kenwood TS570D. Rotator is Creative Labs RC5-1.
(3) Vertical VHF antenna ECO X50, 2m as 6/8 lambda, 70 cm band as colinear 3x5/8 lambda. This is used for short distance connections - CW+SSB with Yaesu FT817 QRP tranceiver and FM for packet radio with QRP Kenwood THF7e to local node.
(4) Inverted V dipole - monoband 50MHz It is simple temporary wire antenna for local QSOs. Top of it is only 2m above the nearest roof of building. Radiating mainly North - South direction. Not usable for longer distance QSO.
(5) Portable VHF antenna As temporary (few hours only) VHF antenna can be raised on the roof while using portable mast set. For example 5 over 5 element Yagi for 2m band on picture. But this QTH is not high enough for VHF contesting. Used with QRP Yaesu FT817.
(6) MiniWhip antenna
Raised only occasionally for receiving SAQ transmissions. Home made using PA0RDT design, placed 5m above the roof at laminate mast (phishing rod).
Powered over coax cable from 12V battery.
For SAQ VLF reception my notebook works as SDR with Rocky software.
PC audio input is galvanically separated from cable by small audio transformer. I recommend to use both methods for QRM reduction:
independent (separated battery) 12v source and transformer.
