Hi Eric, For the best dynamic range from the head amplifier it is best to feed the amplifier with 12V via an unamplified Bias T. The base unit running off 5 V USB also has an additional amplifier so t

I forgot to mention that 2 to 3m USB cables will work well with the SDR-4+ receiver. I used 2m long cables to test them in the workshop. Regards, Chris

Hi Alan, You need to install the driver so that the PC can control the receiver frequency. The firmware in the SDR-4+ receiver is the same as that used in the SoftRock SDR transceivers and receivers w

Hi Paul, Thanks for the feedback on your experiments at VHF with the Loop Antenna Amplifier +. We specify the LAA+ to cover up to 150 MHz due to the low pass filter built into the head unit. In practi

From the description of the extra noise on the coax cable mentioned earlier it may be caused by a poor shield connection between the coax cable and the connector. This will allow the cable to act as a

Due to EU regs for energy saving it is no longer possible to buy or sell a 5 V USB power supply. There are some manufacturers who can still build a high quality switch mode power supply with good RF f

On 160m even with the smaller output from the cardioid loop the Loop Antenna Amplifier + will have enough gain. You could try increasing the loop size to 2m but you would loose performance at higher f

Hi Paul, A simple loop antenna should not be earthed or grounded and using a non-metallic pole will avoid distortion of the antenna pattern. You are correct with your installation of the Wellbrook and

#chat

OK I've run some simulations using a 1m diameter loop at 0.1, 0.5 and 5m above average ground. The loop at these low heights in terms of wavelength is a high angle radiator with the peak of the patter

Give me an hour or so and I'll fire up the antenna modelling program and give you an answer. Regards, Chris

Roger, I agree about your comment regarding diodes if we were using conventional silicon diodes with a 0.7V turn-on voltage. We use transient voltage suppressor array diodes with a breakdown voltage o

It's all very nice looking at cheap TV splitters but I thought that I had better remind everyone that our most popular product at Cross Country Wireless is the range of Multicouplers that we have been

I've just had an email from Brian, 2E0TCU. He has bought a batch of the Ferroxcube toroids recommended for my recent loop counterpoise antenna design in the RSGB RadCom magazine. He is selling the sli

Hi Ondrej, Thanks for posting about the cheap splitter. I noticed that you didn't have a termination in the unused port so the loss will be even higher. Typically a two way splitter has a 4 dB loss. G

Hi Paul, It depends how you use it. If you are using conventional radials or counterpoises for your antenna then an earth rod at a lightning arrestor on the antenna side will be OK. The additional gas

The email service is now back to normal. It will take me a day or so to work through the backlog. Regards, Chris

Looks like Groups.io tries to avoid showing email addresses for security reasons. An image of our alternative email address follows this post. Regards, Chris

My previous post hid the alternative email address for Cross Country Wireless. it is g4hyg@... Regards, Chris

Our email service is still down. It looks like a major problem at Fasthosts. It anyone needs to contact us please use the alternative email address g4hyg@... Regards, Chris

We lost our incoming email service around 7 pm yesterday evening. We are not receiving any emails but can still send emails out as we uses a separate service for that. Regards, Chris