Categories

Archives

A sample text widget

Etiam pulvinar consectetur dolor sed malesuada. Ut convallis euismod dolor nec pretium. Nunc ut tristique massa.

Nam sodales mi vitae dolor ullamcorper et vulputate enim accumsan. Morbi orci magna, tincidunt vitae molestie nec, molestie at mi. Nulla nulla lorem, suscipit in posuere in, interdum non magna.

Arduino Multiband Beacon

Arduino Multiband Beacon INTRO http://blog.dxers.info/2016/01/been-playing-around-with-39usd-arduino.html 144 MHz (2 meters) http://blog.dxers.info/2016/01/arduino-uno-si5351a-breakout-as-144.html 432 MHz (70cm) http://blog.dxers.info/2016/01/arduino-uno-si5351a-breakout-as-432mhz.html 902 MHz http://blog.dxers.info/2016/02/arduino-uno-si5351a-breakout-as-902mhz.html TESTS http://blog.dxers.info/2016/02/etherkit-si5351a-beacon-and-another.html MULTI-BAND Operation (successful) http://blog.dxers.info/2016/02/arduino-tinkerkit-etherkit-si5351a.html 5-BAND Operation (TESTING) http://blog.dxers.info/2016/02/arduino-tinkerkit-etherkit-si5351a_9.html

 

ที่มา: http://blog.dxers.info/p/arduino-multiband-beacon.html

[…]

Broadband Multi-Wire ANTENNA BARRETT

BROADBAND MULTI-WIRE ANTENNA BARRETT BC91200

This antenna consists of three wires connected at the both ends. In the middle of the central wire there is 50W 1250 Ohm resistor. External wires are cut in the middle, attached to isolators and feed through the balun.

Balun is wired on a ring shape ferrite core […]

HF Broadband Antenna

Broadband Antennas:

Diagram above: Broadband VertaLoop as described in this article. Wire loop supported by trees, Diamond BB7V Vertical Element with feedpoint resistive matching unit, “ground” radial wire, metal support pole, coaxial cable, ferrite feedline choke clamps, and grounding points.

Concepts and Construction of the Broadband VertaLoop Antenna Design and Installation Notes by […]

Antenna Tunner

http://www.hamsiam.com/smf/index.php?topic=201726.0

http://www.153rt.com/index.php/topic,5199.html

 

สายอากาศ 40m Delta Loop

– 40Meter delta loop – 2009.12.12 – Recalculated and adjusted each side to 13,59 meter. Made a new run with the miniVNA. The Loop works fine on 40/20 Meter band, and is ‘usable’ but not optimal on 15Meter. Here are the results:

DeltaLoop @ 40meter BAND

DeltaLoop @ 20meter BAND

DeltaLoop @ […]

สอนการใช้ key paddle ส่งรหัสมอร์ส

http://www.youtube.com/watch?v=ZdzjvIk_aY0

สายอากาศ HF

สายอากาศ multi-band ที่ใช้อยู่ เป็นแบบ T2FD (3.5-30MHz)

http://www.i1wqrlinkradio.com/antype/ch9/chiave336.htm

http://www.qsl.net/va3iul/Antenna/Wire%20Antennas%20for%20Ham%20Radio/Wire_antennas_for_ham_radio.htm

เว็บดูการแพร่กระจายสัญญาณ HF

http://www.ips.gov.au/HF_Systems/6/6/1

โปรแกรมฝึกรับรหัสมอส์

http://www.dxatlas.com/PileupRunner/

http://www.rufzxp.net/

http://www.hamsiam.com/smf/index.php?topic=60250.0

ตัวอย่างการปรับแต่งคันเคาะรหัสมอร์ส

Page 1 of 212