LZ1AQ Article Index Organized by Topics

Published on: 2021/01/21

Author: Chavdar Levkov LZ1AQ

Small Active Antennas and Phased Arrays

1 Jan-10 Very Weak Signal Reception with Small Magnetic Loop Antenna
    http://www.lz1aq.signacor.com/docs/fa-eng/Weak_signals-mag_loop_engl.htm
2 Jan-09 Приемане на много слаби сигнали с магнитни антени (Very Weak Signal Reception … in Bulgarian)
    http://www.lz1aq.signacor.com/docs/fa/Weak_signals-mag_loop.htm
3 Jun-11 Wideband Active Small Magnetic Loop Antenna
    http://www.lz1aq.signacor.com/docs/wsml/wideband-active-sm-loop-antenna.htm
4 Jun-10 Wideband Active Small Magnetic Loop Antenna. Protection from Strong Electromagnetic Fields
    http://www.lz1aq.signacor.com/docs/Wide_Mag_loop_prot_v1/wideband_mag_loop_protection.htm
5 Aug-13 Experimental Comparison of Small Wideband Magnetic Loops.
    http://www.lz1aq.signacor.com/docs/experimental-comparison-v10.pdf
6 Feb-14 Single Tone Measurements of Nonlinear Distortions in Wideband RF Amplifiers
    http://www.lz1aq.signacor.com/docs/single_tone_measur/single-tone-measurements.htm
7 Dec-13 Receiving Phased Array with Small Electric or Magnetic Active Wideband Elements. Experimental Performance Evaluation
    http://www.lz1aq.signacor.com/docs/phased-array/2-ele_phased_array11.pdf
8 Apr-15 Receiving with wideband small active loops in NDB band (250 to 500 KHz)
    http://www.lz1aq.signacor.com/docs/loops-in-ndb-band/wideband_loop_ndb_band_11.pdf
9 Sep-15 Diversity Reception with a Modified SDR Receiver and Small Active Antennas
    http://www.lz1aq.signacor.com/docs/dr/deversity-reception.htm
10 Sep-15 Horizontally mounted small active receiving antennas
    http://www.lz1aq.signacor.com/docs/hpsra/horizontally-polarized-small-active-receiving-antennas7.htm
11 Dec-16 A Periodic Switching Technique to Compare Receiving Antenna Performance in the Presence of Strong Fading
    http://www.lz1aq.signacor.com/docs/antenna-performance/switching-technique-compare-receiving-antenna-performance.htm
12 Jan-17 Impact of Resonant TX antennas on the Radiation Pattern of RX Directional Antennas. Detuning of TX Antennas.
    http://www.lz1aq.signacor.com/docs/resonance-impact/resonance-impact.pdf
13 Jan-17 Impacts from Non-resonant Conductive Objects on RX Directional Antennas
    http://www.lz1aq.signacor.com/docs/non-resonant-impact/non-resonant-impact.pdf
14 Jan-17 Spreadsheet to calculate parameters of small RX loop. WLoopCalc
    http://www.lz1aq.signacor.com/docs/w-loop-calc-v12.xls
15 Nov-18 Impact of the Height Above the Ground to the Receiving Performance of a Small Wideband Magnetic Loop
    http://www.lz1aq.signacor.com/docs/loop-height-for-small-magnetic-loop.php
16 Jun-19 Active Wideband Directional Antenna with Vertically Polarized Small Loop and Small Dipole
    http://www.lz1aq.signacor.com/docs/active-wideband-directional-antenna.php
17 May-12
Adding an Input Balun in AAA-1 in Dipole Mode to Reduce 2ndOrder IMD Distortions when Asymmetric Signal Source (antenna) is Used Rev.1.1
    https://active-antenna.eu/tech-docs/adding-input-balun-11.pdf
18 May-12 Reducing the Noise in Dipole Mode with Common Mode Filter Rev.1.0
    https://active-antenna.eu/tech-docs/comm-filter-ftp-10.pdf
19 May-12 Wideband Small Receiving Loop Simplified
    https://active-antenna.eu/tech-docs/wideband-small-receiving-loop-simplified.pdf
20 May-14 Additional Environment Protection of the AAA-1 and VDL-1 Devices
    https://active-antenna.eu/tech-docs/additional-guarding-aaa-b5.pdf
21 Aug-14 Radiation Patterns of 2-el. Active Receiving Phased Array for Loop and Dipole Mode
    https://active-antenna.eu/tech-docs/radiation_patterns.pdf
22 Aug-18 Receiver Front End Protection When Used with Active Antenna AAA-1
    https://active-antenna.eu/wp-content/uploads/2018/03/protection-of-the-receiver-front-end-with-active-antenna-amp.pdf
23 Jun-19 Filters for Wideband Active Antennas to Reject Strong Input Signals from Broadcasting Stations in LW, MW and FM Bands
    https://active-antenna.eu/wp-content/uploads/2019/06/input_reject_filters-v21.pdf

SDR

1 Feb-08 Integrating Software Defined Radio (SDR) and Standard Transceiver
    http://www.lz1aq.signacor.com/docs/sdr-trx-splitter/Integrating%20SDR%20and%20standard%20transceiver.htm
2 Nov-10 Integrating Software Defined Radio (SDR) and a Standard Transceiver. Revision 2
    http://www.lz1aq.signacor.com/docs/Integrating-Software-Defined-Radio_II_HP_eng/Integrating%20Software%20Defined%20Radio_II_v41.htm
3 Nov-19 Integrating Software Defined Radio (SDR) and a Standard Transceiver. Revision 3
    http://www.lz1aq.signacor.com/docs/integrating-sdr-and-standard-transceiver.php
4 Dec-08 Preamplifier and Bandpass filter for SDR from 1.8 to 18 MHz
    http://www.lz1aq.signacor.com/docs/RF_preamplifier_HP_en/RF_preamplifier.htm
5 Oct-11 Measurements of Signal Time Delays in Several SDR Programs.
    http://www.lz1aq.signacor.com/docs/std/Measurements_of_Signal_Time_Delays_in_Several_SDR.htm
6 Jan-15 Time Delay and Frequency Response of the Filters in Perseus SDR Receiver
    http://www.lz1aq.signacor.com/docs/frequency-response/frequency-response-and-time-delay-10.htm
7 Dec-07 Измерване на нелинейните параметрите на софтуерно радио (СР). (Non-linear measurements in SDR)
    http://www.lz1aq.signacor.com/docs/SDR_Measurements_1/SDR-mesurements_1.htm
8 Dec-07 Софтуерно радио (SDR)
    http://www.lz1aq.signacor.com/docs/SDR/SDR.htm
9 Dec-08 Приемник с директно преобразуване на честотата за софтуерно радио. (SDR Receiver Kit)
    http://www.lz1aq.signacor.com/docs/sdrx/SD-RX_manual_214.htm

Antennas

1 Mar-17 2-element Single Mast Wire Beam with 4 Switchable Directions
    http://www.lz1aq.signacor.com/docs/2-ele_inv-v-lz1abc.pdf
2 Jun-17 2-element Single Mast Wire Beam with 4 Switchable Directions (Addendum)
    http://www.lz1aq.signacor.com/docs/2-element-single-mast-wire-beam-add.php
3 Mar-07 Балуни и симетрични линии (Baluns and Symmetrical Feeders)
    http://www.lz1aq.signacor.com/docs/baluni/Baluns&sym_line.htm
4 May-05 Генератор за настройка на насочена антена. (Transmitter for antenna tuning)
    http://www.lz1aq.signacor.com/docs/x-gen/X-gen.htm
5 Dec-02 2 елементен многообхватен Delta Loop (2 element Multiband Delta Loop)
    http://www.lz1aq.signacor.com/docs/2ele-delta/2ele-delta.htm
6 May-05 Добавка към 2-елементен многообхватен delta-loop (Addendum to 2 element Delta Loop)
    http://www.lz1aq.signacor.com/docs/2ele-delta%20dobavka/Dobavka%20-%202ele%20delta.htm
7 Mar-17 A Simple and Very Sensitive RF Current Sensor
    http://www.lz1aq.signacor.com/docs/sensitive-rf-current-sensor.pdf
8 Dec-07 П-Т QRP антенен тунер (Pi-Tee Antenna Tuner)
    http://www.lz1aq.signacor.com/docs/Pi_Tee_tuner/P-T_tuner.htm
9 Dec-07 Антенни тунери (Antenna Tuners)
    http://www.lz1aq.signacor.com/docs/atuner/atuner.htm

Various stuff (in Bulgarian)

1 May-05 Коментар върху допустимите норми за интензивност на електромагнитно поле на което е подложено човешкото тяло
    http://www.lz1aq.signacor.com/docs/el-mag/el-mag-normi.htm
2 May-05 Приемо-предавател за 3,5 и 14 МХц - LZ1AQ (Transceiver for 3.5 and 14 MHz. designed 1976)
    http://www.lz1aq.signacor.com/docs/aq75-trcvr/TransceiverLZ1AQ.htm
3 May-05 Връзка между звукова карта на компютър и трансивер. (Sound Card Connection to TRX)
    http://www.lz1aq.signacor.com/docs/sound-trcvr/Sound-trcvr.htm
4 Dec-08 Управление на трансивер от компютър (PC Control of TRX)
    http://www.lz1aq.signacor.com/docs/pc-interface/PC-Interface.htm
5 Dec-02 Мрежов филтър (Mains Filter)
    http://www.lz1aq.signacor.com/docs/mains-filter/Mains-filter.htm

AAA-1 Documents

Description and Specifications

1 Sep-11 Amplifier for Small Magnetic and Electric Wideband Receiving Antennas (Model AAA-1) Rev.1.1
    https://active-antenna.eu/tech-docs/1_ActiveAA_DandS_11.pdf
2 Nov-14 Amplifier for Small Magnetic and Electric Wideband Receiving Antennas (model AAA-1B) 1. Description and Specifications Rev.2.0
    https://active-antenna.eu/tech-docs/1_ActiveAA_DandS_20.pdf
3 Nov-14 Усилвател за малки широколентови рамкови и диполни антени (model AAA-1B)
    http://www.lz1aq.signacor.com/docs/aaa1-bg/active-antenna-amp-description-bg.html
4 May-15 Model AAA-1C. Addendum to AAA-1B documentation Rev.1.1
    https://active-antenna.eu/tech-docs/aaa-1c-addendum.pdf
5 Jun-18 V1.10 of Control Board. Addendum to AAA-1C documentation Rev.10
    https://active-antenna.eu/wp-content/uploads/2018/06/active-antenna-specification-addendum-cntrlbrd_V110.pdf
6 May-20 Revisión V1.10 de la Tarjeta de Control y Amplificador. Anexo a la documentación AAA-1C
    https://active-antenna.eu/tech-docs/active-antenna-specification-addendum-cntrlbrd_V110_es.pdf

Mounting

7 Feb-12 2. Mounting Instructions (Model AAA-1) Rev.1.2
    https://active-antenna.eu/tech-docs/2_ActiveAA_Mount_12.pdf
8 Mar-17 2. Mounting Instructions Rev.2.1
    https://active-antenna.eu/tech-docs/2_ActiveAA_Mount_21.pdf
9 Mar-17 2. Инструкция за монтаж (Mounting Instructions Rev.2.1) in Bulgarian
    https://active-antenna.eu/tech-docs/2_activeaa_mount_20_bg.pdf
10 Jan-15 2. Istruzioni di montaggio (Mounting Instructions Rev.2.0) in Italian
    https://active-antenna.eu/tech-docs/2_activeaa_mount_20-italian.pdf
11 May-20 2. Instrucciones de montaje (Mounting Instructions Rev.2.1) in Spanish
    https://active-antenna.eu/tech-docs/2_activeaa_mount_21_es.pdf

Antenna construction

13 Dec-11 3. Antenna Rev. 1.1
    https://active-antenna.eu/tech-docs/3_ActiveAA_Antena_11.pdf
14 May-20 3. Antenna Rev. 1.1 (in Spanish)
    https://active-antenna.eu/tech-docs/3_active_aa_antena_11_es.pdf

Q&A

15 Feb-12 4. Questions and Answers Rev. 1.2
    https://active-antenna.eu/tech-docs/4_ActiveAA_QA_12.pdf
16 Jun-12 4. Questions and Answers Rev.2.1
    https://active-antenna.eu/tech-docs/4_ActiveAA_QA_21.pdf

Control

18 Dec-16 PC control of AAA-1 active antenna
    https://active-antenna.eu/tech-docs/pc-control-active-antenna-amp.pdf
19 Dec-16 PC control of AAA-1 active antenna . Download software
    https://active-antenna.eu/software/aaacontroller-1.1-bin.zip
20 Jan-20 Control Board Enclosure for LZ1AQ active antenna. 3D printing
    https://www.thingiverse.com/thing:4095697

VDL-1 Variable Delay Line Kit Documents

1 Jun-14 Variable Delay Line Kit for Active Antenna Phased Arrays. Model VDL-1 Rev. 1.03
    https://active-antenna.eu/tech-docs/variable-delay-line-kit-1_03.pdf
2 Jun-14 VDL-1 PC Control Software Installation and User Guide
    https://active-antenna.eu/tech-docs/vdl_direction-switcher-manual-16.pdf
    https://active-antenna.eu/software/dlinecontroller-1.6.1-bin.zip
    https://github.com/potty-dzmeia/DLineController
3 Jun-14 VDL-1. Keyboard drawings
    https://active-antenna.eu/tech-docs/vdl-1-keyboard-drawings-1to1.zip
4 Jan-17 VDL-1 Ground Connections and Baluns
    https://active-antenna.eu/tech-docs/vdl-ground.pdf
5 Jan-17 DC voltage distribution requirements in VDL-1 system with AAA-1C amplifiers
    https://active-antenna.eu/tech-docs/dc-voltage-aaa1-c.pdf

TRX-SDR Switch Kit

1 Oct-20 TRX-SDR Switch Instruction Manual Rev.1.7.2
    https://sdrswitch.active-antenna.eu/wp-content/uploads/2020/10/trx-sdr-switch-lz1aq-v1.7.2.pdf
2 Aug-20 3D Printed Enclosure for LZ1AQ TRX-SDR Audio Switch
    https://www.thingiverse.com/thing:4574970

Videos from LZ1ABC

1 Oct-20 TRX-SDR Switch (T/R switch)
    https://youtu.be/-plJqKtqwpM
2 Oct-20 Operating CW while listening on your SDR (Software Defined Radio)
    https://youtu.be/6YeNFDw2cto
3 Dec-20 Preparing Control Cable for TRX-SDR Switch
    https://www.youtube.com/watch?v=GPGBzRnLDIw
4 Feb-20 Static in the Antenna
    https://www.youtube.com/watch?v=EJ_Cm_WaQQQ
5 Jan-20 3D printed box for LZ1AQ active antenna
    https://www.youtube.com/watch?v=qwTU73yYtg0
6 Oct-19 Hexbeam antenna - home made
    https://www.youtube.com/watch?v=kxeSxBRtiBI
7 Oct-19 Hexbeam antenna - home made - p.2
    https://www.youtube.com/watch?v=f1eMMJaLgP4
8 Jan-20 Tuning on CQ 160-Meter Contest, CW 2020. AAA-1 in dipole mode
    https://www.youtube.com/watch?v=oWqdcp7tWoQ
9 Jan-18 Active antenna de LZ1AQ for cq ww 160m cw contest 2018 with 230 m long cable
    https://www.youtube.com/watch?v=GaP7oQ2u9Vs
10 Mar-17 2el inverted V antenna for 20m by lz1aq at sp/lz1abc
    https://www.youtube.com/watch?v=cCRHnCGa7O4
11 Mar-17 Portable 2el inverted V antenna for 20m by lz1aq at sp/lz1abc
    https://www.youtube.com/watch?v=DUrAPMrfz1Y
12 Jan-19 lz1abc at j42l with my active antenna
    https://www.youtube.com/watch?v=tqzplvZEt9E
13 Feb-19 Diversity reception compilation by LZ1AQ
    https://www.youtube.com/watch?v=GqvmXoqOXCE