I was asked yesterday if we could bring back our Active V antenna or make an equivalent antenna. We originally designed the Active V antenna at the request of one of our customers who had some Rohde a

Is there a chance of a re-run of the HF Active Antenna (the 'Sentinel' one)? The updated version that went down to 10kHz was just the job for LF monitoring. Perhaps a short run, or even a bag of bits

Hi, I like that this antenna seems to be an "all in one" antenna, so I was wondering how does it preform.... against the FlightAware 1090 (+ filter) ADS-B antenna? against my discone? (25 - 1300 MHz,

After the dramatic results of the 300 baud AX.25 vs VARA test in early January, I am now ready to go with a 3-way comparison test of the new VARA modem -vs- MFSK-16 generated by FLdigi -vs- OFDM gener

[this project was inspired by the continuing search for a successor to CCW's "APRS Messenger" HF APRS-over-PSK63 program.] After spending nearly the entire New Year's 3-day weekend twiddling TCP/IP se

Good Afternoon all, Just keen to get a sense of where the sweet spot is for Coax - I'm needing approx. 20M to run in to the house from the garden.... Currently I use M&P Ultraflex 7, which is great, b

This morning we were informed at the Post Office that all Royal Mail international mail and parcel services outgoing from the UK are cancelled until further notice due to a "cyber incident". The lates

The latest batch of the High Z Antenna Amplifier shipping today has an extra layer of protection against overload on the front end of the amplifier. One of our customers has managed to damage one usin

I was wondering if you can please help me improve my loop antenna for receiving. My loop, which is made of 14 guage wire is 4' about the ground and aiming SW/NE, nulls are NW/SE. The coax connecting t

Looking WTB a CCW HF Preselector with Air Variable Capacitor unit with single Knob on Front with switch and two BNC connections on back Any help appreciated ! 73 Mike WB6DJI Good on QRZ.com

Tomorrow (27 December) between 1100 and 2300 UTC the High Frequency Active Auroral Research Program (HAARP) transmitter in Alaska is being activated to attempt to reflect a HF radar signal off a passi

Hi, I am unable to catch anything on longwave and I am using a 12V power adapter. Is there a way that I can see what the voltage is coming out of the coax and in to the amplifier?

Due to the postal strikes in the UK we are waiting for some components to complete several orders. Meanwhile we are working on what we can. Here's the latest batch of 50 Bias Tee boards ready for test

Thanks Chris and Steve I assume I should avoid the eBay devices as they could be fakes? could I buy a couple from you Chris as I assumed you go to one of the big suppliers and I want to avoid their Mo

Hi Steve, The active device is an Infineon BFR106 transistor. You will be OK using 75 ohm coax with it without modification. What appears to be an output transformer is actually a common mode choke to

Hi all I have a CCW beverage preamp and I suspect I have accidentally put too many volts up the coax from a variable power supply. I was trying to see how much voltage drop there is in my 400m+ long c

I’ve had my new CCW LAA++ for a number of weeks now and have given it an initial test drive. Ordering the loop from Chris was easy and problem free with the package arriving in a reasonable length of

On the terminated inverted U web page it says Can I run an extra wire between the two earth or ground rods?... I've now tried this and while it increases antenna efficiency by not including the ground

Hi, Sorry for the newbie question but on the LAA++ is the null area the hole in the middle of the "doughnut" ? So just to check my understanding the antenna is picking up broadside.. is it a 360 patte

Hi all,just out of intrest does the cross country bias t work on wellbrook loop? regards