Roger G3XBM's (Mainly) Amateur Radio Blog

Just now I saw a Chinese RX on Amazon.  At £44.99 I just cannot see how they do it.  

Many people like simple, but effective, receivers. This design is probably one of the simplest you could make. It works very well.  There ar...

Some years ago, I wanted to see just how simple a receiver could be made with a decent performance. Later, this was converted into a full ...

A nice simple RX built by NG9D is demonstrated on YouTube.

There are plenty of designs out there (try Googling "regen"). but I offer you this simple design with very few parts. It works. Yo...

In the years following WW2, there were plenty of surplus transceivers and receivers around, often in "as new" condition. Also, m...

My very first communications receiver weighed a ton (it took 2 people to move it!) and was a DST100 . I believe it was made by Murphy during...

To detect VLF amateur signals it is pretty essential to use a good receiver (with frequency locking so extremely narrow bandwidths can be re...

This data was passed to me by Steve G1KQH (again). It looks like an SDR in a screened box with proper interfaces. It comes from Hong Kong....

A reminder that the historic alternator TX on 17.2kHz VLF will be sending a message this Sunday twice. They usually QSL via the amateur QSL ...

When the grandchildren and family have all gone home next week, my first project will be to improve the RX antenna system for 472-479kHz rec...

SWL Roland's enhanced SM6LKM software VLF receiver An SWL called Roland from Germany has produced an enhanced version of SM6KLM'...

http://www.sherweng.com/table.html Sherwood carry out comprehensive tests on various amateur products. See the full list in the link above...

SM6LKM's excellent PC based VLF receiver In testing my Chirpy 10m transceiver, I used the simple PC based VLF receiver by SM6LKM as...

SM6LKM has a very neat sound card based VLF receiver ideal for listening to sub-9kHz ham signals and SAQ on 17.2kHz. On his website you can...

G1INF has a neat idea on his blog for a simple direct conversion RX that is powered from the USB connection of a PC. His application was fo...

There is an on-line VLF receiver on which you can hear natural emissions such as sferics, tweeks and whistlers located at Todmorden in the ...

The Twente University online SDR in The Netherlands has now got a 500kHz receiver. It works well and SM6BHZ's SSB beacon was coming thr...