I've sent a PM as your order was shipped last week but I'll update others with the situation. During the Covid-19 lockdown we have an arrangement with the local postmaster that we drop our batch of pa

Just before the Covid-19 lockdown we built a large batch of HF/VHF/UHF Multicouplers so that we could avoid having to go to the workshop during the peak of the virus. As the lockdown has eased slightl

In the VLF/HF version the capacitors used with the common mode choke act as a low pass filter with a cut off frequency of 35 MHz. The VHF FM broadcast band will be about 20 dB down. You would certainl

I'll post on the forum when the new batch is ready for shipping. Regards, Chris

Hi Les, You would get good results powering the head unit amplifier directly with the bias-tee in your SDRPlay receiver. Now we can get back to the workshop we are building a new batch of Loop Antenna

Hi Hisao, For VHF FM broadcast station monitoring you probably wouldn't see much improvement over your existing HF/VHF version. The ferrite change allowed the frequency range of the HF/VHF version to

Hi Paul, The original version of the Loop Antenna Amplifier (after the upgrade) would cover 50 kHz to 30 MHz. The latest version that we are now selling with the white Ferroxcube toroids covers 20 kHz

Hi Simon, Thanks for posting the information on your loop. If you don't mind I've added the image of your loop antenna that you sent me in an email yesterday. Regards, Chris

Hi Brent, I've sent you a private email. Regards, Chris

Hi Brent, A few questions so that I can help you with faultfinding... Can you tell what has failed? Is it the head unit or the base unit? If you have a SDRPlay receiver can you power the head unit on

Thanks Carl. With so many SDRPlay receivers out there used by short wave listeners it makes sense to design any new active antenna so that they can be used over a wide voltage range. During the testin

Hi Vince, There is an amplifier built into the base unit. The gain of the head unit and base unit is similar at 13 dB. Usually both units are used together so that the user sees a similar signal level

Hi Glen, We don't supply the BNC cables for the Multicoupler. We are taking orders via the PayPal buttons on the web site. Regards, Chris

#chat

Paul, Your amplifier has most of the changes except for the change to allow operation up to 15V. Regards, Chris

We have just brought out a revised version of the Loop Antenna Amplifier called the Loop Antenna Amplifier +. There have been a few changes made to the base unit amplifier to improve stability with so

The situation as of the 14 April is that I can still access the workshop on my own and continue making some products. We have stopped making products that took significant workshop assembly and are no

#chat

Hi Vince, Yes it's the high Z antenna amplifier we discussed on the Topband mailing list. The first batch is nearly completed and the production boards test OK. As expected it works great on 160 and 8

As a super picky engineer testing it on a network analyser I would say yes there is a difference, a few dB here, a few dB there. As a keen radio amateur or short wave listener monitoring real on-air s

The main difference is that it now covers the full frequency range covered by the previous VLF/HF and HF/VHF versions. The latest VLF/HF version you have Mat has all the latest changes apart from the

There are quite a few minor differences to the new version but the biggest change to get the wide frequency range is a change of ferrite material and supplier used in the toroid cores. The ferrite mat