1. QRP 2000 USB Controlled Synthesiser Kit (Набір синтезаторів з контролем USB QRP 2000) - https://www.sdr-kits.net/QRP2000-kits

2. UY5XE: 25 лет назад… - https://deltaclub.org.ua/bibliteka/25-let-nazad.html

3. Измеритель емкости литиевых АКБ -

https://radioskot.ru/publ/zu/izmeritel_emkosti_litievykh_akb/8-1-0-1587

4. Раскрытие на передачу Icom IC-7300 (MARS MOD) - http://radiochief.ru/payal-nik/raskrytie-na-peredachu-icom-ic-7300-mars-mod/

** YAESU FT-991A раскрытие на передачу и что такое MARS MOD - http://radiochief.ru/payal-nik/yaesu-ft-991a-raskrytie-na-peredachu-i-chto-takoe-mars-mod/

5. Antenna Mini-Whip (SMD) - https://g8jnj.net/Portable%20Vee%20Dipole.pdf

** Easy-SDR - https://github.com/IgrikXD/Easy-SDR

1. MLA-M Magnetic Loop Antenna – Multiband 3,5 a 28 MHz QRP - http://air-radiorama.blogspot.com/2016/12/mla-m-magnetic-loop-antenna-multiband.html

2. Half-size dipole antenna for the 20 mtr band - https://g8jnj.net/Portable%20Vee%20Dipole.pdf

3. TX noise performance of modern HF transcievers (Ефективність шуму TX сучасних КХ-трансиверів) - http://lea.hamradio.si/~s53ww/TX%20noise/TX_noise.html

4. TX-RX SEQUENCER (та інші саморобні конструкції) - https://www.qsl.net/yo4hfu/Sequencer.html

** ARDUINO rotator controller - https://www.qsl.net/yo4hfu/Arduino_rotator.html

5. Juma Keyer1 (Мініатюрний набір мікроконтролерів PIC для CW) - http://www.jumaradio.com/juma-keyer1/

1. Portable Vee Dipole (конструкція антени) - https://g8jnj.net/Portable%20Vee%20Dipole.pdf

2. HF Propagation Prediction (прогнозування поширення на КХ) - https://soundbytes.asia/proppy/

3. TA7OM: 40m 2 El HQ Traps Yagi - https://www.ta7om.com/projeler/40m-2-el-hq-traps-yagieng.html

4. 1/4 Vertical bazooka antenna for the 40m - http://www.on8im.be/en/homemade/homebuilt-antennas/53-1-4-vertical-bazooka-antenna-for-the-40m.html

5. 2 Meter Vertical Dipole Antenna (конструкція антени) - https://g8jnj.webs.com/6_1%20Balun.pdf

1. WA3RNC TR-25 CW Transceiver Kit - http://www.nerfd.net/2021/05/28/wa3rnc-tr-25-cw-transceiver-kit/

2. new dxcluster IZ0UIN-6 telnet clusterdx.ddns.net port 7300 - http://www.iz0uin.it/2021/05/23/dx-cluster-iz0uin-6/

3. DigiLink Nano (compact digital mode Ham Radio interface) - https://www.hb9zhk.ch/

4. Constructing a 6:1 RF transformer - https://g8jnj.webs.com/6_1%20Balun.pdf

** Active antenna overview - https://www.g8jnj.net/activeantennas.htm

5. DXMAPS 4.2 - QSO/SWL real time information - https://www.dxmaps.com/spots/mapg.php?Lan=E

1. Antenna Project – HF QRP End Fed Half Wave - https://vk1nam.wordpress.com/2021/03/07/antenna-project-hf-qrp-end-fed-half-wave/

** SOTA – 6m 52 MHz Coaxial Dipole Antenna - https://vk1nam.wordpress.com/2015/08/16/sota-6m-coaxial-dipole-antenna/

2. Revisiting the Rybakov 806 Vertical - https://wb3gck.com/2018/12/09/revisiting-the-rybakov-806-vertical/

3. Генератор фиксированной частоты - https://ur3ilf.blogspot.com/?view=classic

4. "ЁЖИК S2 OLED" всеволновой универсальный синтезатор частот КВ трансивера - http://radio-kits.ucoz.ru/

5. Синтезатор LC72131 на 27 МГц - https://radiokot.ru/artfiles/6618/

** Активная антенна для радиовещательного СВ диапазона - https://radiokot.ru/artfiles/6617/

1. QRP Contest Calendar(June 2021) - https://www.contestcalendar.com/contestcal_qrp.html

** CWops Mini-CWT Test (1300Z-1400Z, Jun 2; 1900Z-2000Z, Jun 2; 0300Z-0400Z, Jun 3; 1300Z-1400Z, Jun 9; 1900Z-2000Z, Jun 9; 0300Z-0400Z, Jun 10; 1300Z-1400Z, Jun 16; 1900Z-2000Z, Jun 16; 0300Z-0400Z, Jun 17; 1300Z-1400Z, Jun 23; 1900Z-2000Z, Jun 23; 0300Z-0400Z, Jun 24; 1300Z-1400Z, Jun 30; 1900Z-2000Z, Jun 30) - https://cwops.org/cwops-tests/

** Wake-Up! QRP Sprint (0600Z-0629Z, Jun 5 and 0630Z-0659Z, Jun 5 and 0700Z-0729Z, Jun 5 and 0730Z-0800Z, Jun 5) - http://qrp.ru/contest/wakeup/333-wakeup-eng

** UKSMG Summer Contest (1300Z, Jun 5 to 1300Z, Jun 6) - http://uksmg.org/summer-contest-rules.php

** RSGB National Field Day (1500Z, Jun 5 to 1500Z, Jun 6) - https://www.rsgbcc.org/hf/rules/2021/rnfd.shtml

** ARS Spartan Sprint (0100Z-0300Z, Jun 8) - http://arsqrp.blogspot.com/2009/02/so-whats-spartan-sprint-and-how-do-i.html

** NAQCC CW Sprint (0030Z-0230Z, Jun 9) - http://naqcc.info/sprint/sprint202107.html

** AGCW VHF/UHF Contest (1400Z-1700Z, Jun 12 (144) and 1700Z-1800Z, Jun 12 (432)) - http://alt.agcw.de/index.php/en/contests-and-cw-activities/vhf-uhf-contest

** GACW WWSA CW DX Contest (1500Z, Jun 12 to 1500Z, Jun 13) - http://www.contest.com.ar/gacw-wwsa

** NAQCC CW Sprint (0030Z-0230Z, Jun 16) - http://naqcc.info/sprint/sprint202107.html

** West Virginia QSO Party (1600Z, Jun 19 to 0400Z, Jun 20) - http://www.qsl.net/wvsarc/wvqp/wvqp.html

** WAB 50 MHz Phone (0800Z-1400Z, Jun 20) - http://wab.intermip.net/Contest%20Rules.php#OtherRules

** Run for the Bacon QRP Contest (2300Z, Jun 20 to 0100Z, Jun 21) - http://qrpcontest.com/pigrun/

** ARRL Field Day (1800Z, Jun 26 to 2100Z, Jun 27) - http://www.arrl.org/field-day

2. 5-element 70 cm QUAGI - https://sites.google.com/view/kn9b/yagi

3. NCDXF/IARU International Beacon Project - Reverse Beacon Network - http://www.ncdxf.org/beacon/RBN.html#Challenge

4. Черговий випуск The 144 MHz EME NewsLetter (Issue 05/2021 15 May 2021) - http://www.df2zc.de/downloads/emenl202105_final.pdf

5. ЗОВП ГО “ЛРУ”: DX бюллетень №6.1 - http://lru.zp.ua/dx-byuleten-6_1/

1. A Homebrew Z-Match Transmatch - https://wb3gck.com/page/5/

2. Результати «Кубку України з радіозв'язку на коротких хвилях малою потужністю 2021 р.» - http://chu.cc.ua/files/Protokol_LPCW2021.pdf

3. Delta Loops for HF - http://www.w5sdc.net/delta_loop_for_hf.htm

4. G3LHZ's system for matching antennas - https://pa0fri.home.xs4all.nl/ATU/G3LHZ/G3LHZ%20ATU%20Eng.htm

5. Dual Band VHF/UHF J Pole - http://www.users.on.net/~endsodds/jpole.htm