rk3zk

Igor Grigorov, UA3ZNW, UZ3ZK, RK3ZK, VA3ZNW

I trust in EH antennas!

PDF file, 560 KB (ANTENTOP-01-2003, pp.: 14- 22)

Nonlinear effects on antennas

PDF file, 300 KB (ANTENTOP-01-2003, pp.: 23- 28)

Multi- Range Vertical Antenna UA1DZ

PDF file, 290 KB (ANTENTOP-01-2003, pp.: 29- 31)

Once again about a magnetic loop

PDF file, 360 KB (ANTENTOP-01-2003, 32- 34)

Keys for QRP- expeditions

PDF file, 230 KB (ANTENTOP-01-2003, pp.: 35- 37)

QRP beyond belief

PDF file, 230 KB (ANTENTOP-01-2003, pp.: 35- 37)

Old computer's PSU gives useful parts for antennas

PDF file, 515 KB (ANTENTOP 01-2003, pp.: 38- 46)

LDE, another look to inexplicable effect

PDF file, 200 KB (ANTENTOP-01-2003, pp.: 61- 62)

EARTH ACUPUNCTURE: Feedback on the problem…

PDF file, 810 KB (ANTENTOP 01-2003, pp.: 63- 70)

Antennas in the mountains

PDF file 350 KB (ANTENTOP 01-2003, pp.: 51- 55)

Trap in the Main

PDF file, 210 KB (ANTENTOP-02-2003, pp.: 34- 36)

Interferences from Old Power Amplifiers

PDF file, 170 KB (ANTENTOP-02-2003 p.: 33)

Fast Made a Half Wave Antenna for 80 meters

PDF file, 250 KB (ANTENTOP-02-2003 pp.: 51- 52)

Old computer's PSU gives useful parts for antennas. Continued from ANTENTOP 01- 2003, #002

PDF file, 670 KB (ANTENTOP-02-2003 pp.: 65- 77)

Multirange Vertical Antennas

PDF file, 200 KB (ANTENTOP-03-2003, pp.: 42- 44)

Old Military HF - Antennas of Communication Cars

PDF file, 310 KB (ANTENTOP-03-2003, pp.: 44- 49)

Trap on Coaxial Cable

PDF file, 140 KB (ANTENTOP-03-2003, p.: 72)

Hysteresis at a Coaxial Cable

PDF file, 130 KB (ANTENTOP-03-2003, p.74)

Wooden Struts

PDF file, 140 KB (ANTENTOP-03-2003, p.: 76)

RBM Radio

PDF file, 700 KB (ANTENTOP-03-2003, pp.: 86- 91)

Modern Military HF- Antennas of Communication Cars

PDF file, 300 KB (ANTENTOP-01-2004, pp.: 34- 38)

Something about Antenna Tuning Units

PDF file, 340 KB (ANTENTOP-01-2004, pp.: 40- 45)

Antenna Tuning Unit for 6-meters

PDF file, 120 KB (ANTENTOP-01-2004, p.: 46)

Shunt Vertical Universal HF Antenna

PDF file, 500 KB (ANTENTOP-02-2004, pp.: 36- 46)

Multirange Trap Antennas

PDF file, 520 KB (ANTENTOP-02-2004, pp.: 47- 61)

Forgotten Antenna

PDF file, 190 KB (ANTENTOP-02-2004, p.: 68)

Losses of RF Power when Feeder works at SWR mode

PDF file, 180 KB (ANTENTOP-02-2004, p.: 72)

An absorbing Filter

PDF file, 115 KB (ANTENTOP-02-2004, p.: 73)

Russian Transceiver EFIR

PDF file, 140 KB (ANTENTOP-02-2004, p.: 80

UW3DI- the Timeless Transceiver

PDF file, 530 KB (ANTENTOP-02-2004, pp.: 81- 85)

Old Receiving Magnetic Loop Antennas

PDF file, 300 KB (ANTENTOP-02-2004, pp.: 87- 92)

Building Antennas

PDF file, 160 KB (ANTENTOP-01-2005, pages: 46- 48

Window Dipole Antennas with Capacitive Loads for the 6 and 10 meters Band

PDF file, 360 KB (ANTENTOP-01-2005, pages: 49- 58)

Broadband Indoor Antenna

PDF file, 650 KB (ANTENTOP-01-2005, pages: 59- 63 and 101- 106)

Simple QRP CW Transceiver for the 20 meters

PDF file, 720 KB (ANTENTOP-01-2005, pages: 67- 69)

Nonlinear Propagation of Radio- Wave in Ionosphere

PDF file, 220 KB (ANTENTOP-01-2005, pages: 74- 75)

Einstein Wave or just LDE

PDF file, 760 KB (ANTENTOP-01-2005, pages: 76- 78)

The Wonderful Beverage Antenna

PDF file, 900 KB (ANTENTOP-01-2006, page: 45- 49)

Indoor Helical Antenna for the 20 and 17 meters for K1

PDF file, 200 KB (ANTENTOP-01-2006, pp: 50- 52)

Experiments with the VHF Magnetic Loop

PDF file, 410 KB (ANTENTOP-01-2006, pp: 53- 54)

Radio Signals out of Our Times

PDF file, 870 KB (ANTENTOP-01-2006, pp.: 61- 65

Russian Ham Licence for 1995

PDF file, 560 KB (ANTENTOP-01-2006, page: 87-88)

Tube - Semiconductor Transceiver (TST)

PDF file, 1.5 MB (ANTENTOP-01-2007, pp.: 46- 57)

Simple SWL HF- VHF Receiver

PDF file, 650 KB (ANTENTOP-01-2007, pp. 58 -63)

Key for K1

PDF file, 110 KB (ANTENTOP-01-2007, page: 71)

Application for HF- VHF radio amateur station

PDF file, 750 KB (ANTENTOP-01-2007, pp.: 80- 82)

Simple Broadband P.A

PDF file, 640 KB (ANTENTOP-01-2008, pp.: 63- 68)

Transceiver SQT

PDF file, 1.45 MB (ANTENTOP-01-2008, pp.: 80- 93)

Universal RF Amplifier of a QRP- Transceiver

PDF file, 300 KB (ANTENTOP-01-2009, pp: 70...72)

Tube AM Radio Station for the 160- meters

PDF file, 450 KB (ANTENTOP-01-2009, pp: 74-77)

A Multi Band Tube 10 w QSK Transceiver

PDF file, 250 KB (ANTENTOP-01-2010, pp: 75- 78)

An 80 m CW Valve Transceiver

PDF file, 120 KB (ANTENTOP-01-2010, p: 80)

Wires for Antenna and Grounding

PDF file, 160 KB (ANTENTOP-01-2013, pp: 90- 91)

Helical Antenna for the 20- meter Band

PDF file, 220 KB (ANTENTOP-01-2013, pp: 44- 46)

Bridge Effect

PDF file, 200 KB (ANTENTOP-01-2014, pp: 94- 96)

Simple Broadband Antenna for the 40- meter Band

PDF file, 390 KB (ANTENTOP-01-2014, pp: 30- 34)

Simple HF ATU on Lengths of Coaxial Cable

PDF file, 300 KB (ANTENTOP-01-2014, pp: 85- 88)

Experimenters with Microwave Oven

PDF file, 220 KB (ANTENTOP-01-2015, pp: 99- 100)

Universal Beverage Antenna

PDF file, 460 KB (ANTENTOP-01-2015, pp: 35- 41)

Insulation RX Transformer

PDF file, 250 KB (ANTENTOP-01-2015, pp: 80- 82

Modified Beverage Antenna

PDF file, 350 KB (ANTENTOP-01-2016, pp: 23- 29)

Shortened Helical Antennas

PDF file, 100 KB (ANTENTOP-01-2016, p: 92)

High- Height Invisible Antennas

PDF file, 80 KB (ANTENTOP-01-2016, p.: 91)

Time Machine. QSLs from the Past from E- QSL.

PDF file, 160 KB (ANTENTOP-01-2016, p.: 82)

Experimenters with Non Snap Ferrite Cylinder Bead RF Chokes

PDF file, 390 KB (ANTENTOP-01-2016, pp.: 76- 81)

Beverage Antenna. Theoretical Look on Practical Result.

PDF file, 1.6 MB (ANTENTOP-01-2016, pp.: 33- 45)

Black Holes in the Air

PDF file, 60 KB (ANTENTOP-01-2016, p.: 71)

Indoor Dipole Antenna for 20 Meter

PDF file, 80 KB (ANTENTOP-01-2017, p.: 37)

Balcony Dipole Antenna for 20 Meter

PDF file, 100 KB (ANTENTOP-01-2017, p.: 38)

Time Warp on 20 Meter

PDF file, 120 KB (ANTENTOP-01-2017, p.: 78)

Sputnik Transmitter

PDF file, 300 KB (ANTENTOP-01-2017, pp.: 75- 76)

Two Wires Beverage Antenna

PDF file, 350 KB (ANTENTOP-01-2017, pp.: 48- 52)

Several Universal ATUs for the Whole Amateur HF Band

PDF file, 550 KB (ANTENTOP-01-2017, pp.:65- 71)

RF Sniffer

PDF file, 320 KB (ANTENTOP-01-2018, pp.: 87- 90)

Low Profile Antenna for the 30, 20, 17, 15, 10 and 6- meter Bands

PDF file, 300 KB (ANTENTOP-01-2018, pp.: 8- 11)

Antenna Switching Units

PDF file, 500 KB (ANTENTOP-01-2018, pp.: 80- 86)

Broadband 50- MHz Antenna

PDF file, 420 KB (ANTENTOP-01-2018, pp.: 44- 48)

Spreading and Underground Antennas

PDF file, 500 KB (ANTENTOP-01-2019, pp.: 5- 15)

Folded Beverage Antenna

PDF file, 520 KB (ANTENTOP-01-2019, pp.: 30- 36)

Simple RF- Bridge: Design and Applications

PDF file, 130 KB (ANTENTOP-01-2020, pp.: 94- 95)

RF Generator for HF Bands 1.8- 30- MHz

PDF file, 180 KB (ANTENTOP-01-2020, pp.: 91- 93)

Outdoor Window Mounted HF Helical Antennas

PDF file, 190 KB (ANTENTOP-01-2020, pp.: 40- 43)

HF Helical Antennas: Theory and Practice

PDF file, 1.9 MB (ANTENTOP-01-2020, pp.: 05- 37)

Old QSLs

PDF file, 170 KB (ANTENTOP-01-2020, p.: 99)

Ferrite Clips and RF Current Sniffer

PDF file, 190 KB (ANTENTOP-01-2020, pp.: 96- 98)

End Fed 6- meter Zepp Antenna with Resonance at 2- meter Band

PDF file, 240 KB (ANTENTOP-01-2020, pp.: 68- 71)

Antennas. Urban Design

PDF file, 100 KB (ANTENTOP-01-2021, p.:92)

Antennas. Tuning and Adjusting

PDF file, 100 KB (ANTENTOP-01-2021, p.:91)

Observation of Anomalous Propagation of Radio Waves in the MW Band

PDF file, 310 KB (ANTENTOP-01-2021, pp.:87-90)

Dipole Antenna for the 50-MHz Band

PDF file, 265 KB (ANTENTOP-01-2021, pp.:52- 55)