Topics

1

The RF Workbench / EMTX

« on: October 24, 2021, 1327 UTC »

The EMTX: How to build an 8 component 40/30 meter QRP emergency transmitter

https://swling.com/blog/2021/01/the-emtx-how-to-build-an-8-component-40-30-meter-qrp-emergency-transmitter/

How to build a PC keyer and AM modulator for the EMTX emergency transmitter

https://swling.com/blog/2021/01/how-to-build-a-pc-keyer-and-am-modulator-for-the-emtx-emergency-transmitter/

//QRP

2

HF Mystery Signals / Mystery frequency hopping station 10108-10115 kHz and 18834/18899 kHz

« on: December 11, 2018, 1352 UTC »

Mystery frequency hopping station 10108-10115 kHz and 18834/18899 kHz

http://www.southgatearc.org/news/2018/december/iarums-reports-on-mystery-frequency-hopping-station.htm

Is it a jumping beacon?

3

Huh? / Waiting For The Next Sunspot Cycle: 2019-2030

« on: July 16, 2017, 1653 UTC »

If you are an aurora watcher, 2022-2027 would be the best years to go hunting for them.


http://www.huffingtonpost.com/dr-sten-odenwald/waiting-for-the-next-suns_b_11812282.html

4

Huh? / Radio War between Russia and Ukraine on 3735 kHz LSB.

« on: July 03, 2017, 1416 UTC »

Seems quite well organized with incredibly good sound and a host of computers connected with a number of kw in the cord on 3735 kHz LSB.

5

Huh? / Guerrilla Radio

« on: April 01, 2015, 1258 UTC »

The Lowdown breaks down the rituals and routines of the criminal justice system.
https://www.themarshallproject.org/2015/03/26/guerilla-radio?ref=tsfb

6

Equipment / More like a tsunami than a QRP transmitter...

« on: February 20, 2015, 1441 UTC »

More like a tsunami than a QRP transmitter...

http://www.dc9dz.de/en/tsunami40k.html

7

General Radio Discussion / What to say about this..?

« on: February 12, 2015, 1154 UTC »

What to say about this..?
http://www.engineeringradio.us/blog/2015/02/brother-could-you-help-a-pirate-out/

8

The RF Workbench / Another helpfull site for making RF

« on: December 13, 2014, 1847 UTC »

Another helpfull site for making RF

http://am-transmitter.blogspot.de/

9

HF Beacons / CW "L" on 5155 Khz

« on: November 20, 2012, 1252 UTC »

Have a little fun station on 5155 Khz. It sends CW "L" mixed with some form of data that begins with a "boooinnng". Data is not FSK but something else. Broadcast sessions are short.

10

HF Beacons / Reverse Beacon Network

« on: June 25, 2011, 0501 UTC »

http://www.reversebeacon.net/index.php

11

HF Beacons / PSK31 Beacon using a PIC

« on: April 08, 2010, 1644 UTC »

http://www.ringolake.com/pic_proj/PSK31/pic_psk31.html



//QRP

12

HF Beacons / Can you hear this beacon, 10.133 MHz?

« on: March 03, 2010, 1348 UTC »

http://www.radiorud.se/fyren.asp

Can you hear this beacon, 10.133 MHz?

//QRP

13

HF Beacons / Beacon Lists

« on: February 06, 2010, 1645 UTC »

Beacon Lists
http://www.keele.ac.uk/depts/por/psc.htm#beacons

Worldwide List of HF Beacons
http://www.keele.ac.uk/depts/por/28.htm

//QRP

14

HF Beacons / 1229 km with 1 mW on 500 kHz

« on: January 25, 2010, 1835 UTC »

Roger G3XBM has been trying to break the 1000 km barrier with his 1 milliwatt 500 kHz station.
http://www.southgatearc.org/news/january2010/1229km_with_1mw.htm

Operating on the 500kHz (600m) band
http://sites.google.com/site/g3xbmqrp/Home/500k

Roger G3XBM Blog
http://g3xbm-qrp.blogspot.com/

Roger's QRP Website
http://www.g3xbm.co.uk/

//QRP

15

HF Beacons / What has happened to ...

« on: January 05, 2010, 1358 UTC »

... this home page: http://highfrequencybeaconsociety.com/

Is there is any other similar?

//QRP