NJDTechnologies

Radio: it's not just a hobby, it's a way of life

Current Operating Frequency and Mode

OFF AIR

MF/LF Operating: Life Below the AM Broadcast Band – column references and bonus material

April, 2017 footnotes

  1. http://njdtechnologies.net/the-ins-and-outs-of-filing-an-application-for-a-part-5-experimental-license-on-630-meters/

  2. http://www.qsl.net/d/dl4yhf/wolf/wolf_info.html

  3. http://abelian.org/ebnaut/

  4. http://ve7sl.blogspot.ca/2015/01/the-low-noise-vertical.html

  5. https://wg2xka.wordpress.com/an-receive-only-vertical/

  6. https://www.dropbox.com/s/mqwpxobqv8gmlak/no3m.pdf?dl=0

  7. http://njdtechnologies.net/the-daytime-surprises-on-630-meters-continue/

  8. http://njdtechnologies.net/091516/

  9. http://njdtechnologies.net/wp-content/uploads/2017/01/VO1NA-CW-PARDT-012417.mp3

 

Bonus content for April, 2017

W1VD’s enlarged K9AY loop with vactrol termination and balanced feedline: http://w1vd.com/k9ay11.pdf

Both receiver and transmitter stability are important when running the very slow visual CW modes. Here is an image of my drifting QRSS60 CW signal at 5 mW ERP during a very low power test with another station.

WG2XIQ QRSS60 CW. Painfully slow and not very stable (courtesy W5EST).

 

WG2XIQ CW on 474.5 kHz in Wisconsin at WH2XHY on a very good night (courtesy WD8DAS):

 

This is an image supplied by KL7L (ex-KL1X) of “AQC” (G3AQC, SK) of the first 137 kHz decode from Europe in Alaska “way back when”:

AQC at KL1X on 137 kHz – First EU -> KL7 reception (courtesy KL7L)

 

WSPR and JT9 are very common on 630- and 2200-meters. This image was supplied a few years back by David, VK2DDI. He was pointing out that the faint signal around 475.620 kHz was most likely me but during this sequence there wasn’t enough signal for a decode.

VK2DDI WSPR and JT9 passband (courtesy VK2DDI)