Tag Archives: BHI

Advice on cancelling locally generated noise

An SWLing Post reader recently contacted me with the following question:

“What devices work well to cancel out local RFI? I’ve been told that both the Timewave ANC-4 and a number of BHI products are all worth considering.”

Unfortunately (or fortunately, for me) I’ve no experience with outboard DSP or noise cancelling devices because I live in such an RFI-free area.

I know this reader already has a Wellbrook Loop, but he’s looking for a way to even increase noise mitigation further at his home listening post.

Post Readers: Can you help guide him?  Please comment with your experience. Is a product like the Timewave or BHI the next logical step? If not, what is?

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Phil demonstrates the BHI NEIM1031 Noise Eliminating In-Line Module


Many thanks to SWLing Post contributor, Phil Brennan, who writes:

[Recently] one of your contributors mentioned that he purchased a BHI DSP unit at a discounted price. I purchased one (a different model to the one in the previous post) some months ago before I headed away travelling.

The post reminded me that I had made a small video demonstrating the DSP unit on my FRG7. The video shows me tuning the DSP on a broadcast of Voice of the People on 3912 khz. While QRM at my place isn’t too bad, it’s still present and the DSP does aid in clearing up a signal.

Voice of the People is usually jammed by the DPRK and the DSP also assists in reducing the roar of the jammer. Of course one can go to far with DSP and the audio can suffer from that underwater sound.

Thank you, Phil! The FRG-7 is an ideal receiver for something like the BHI module since it precedes on-board DSP. The great thing about an in-line module, of course, is that it can be used with a variety of receivers.

Click here to view the BHI NEIM1031 MKII on BHI’s website.

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BHI Summer Sale


Many thanks to SWLing Post reader, TomL, who notes:

Not sure if you had anything posted for this but I stumbled on BHI having a summer sale until August 16. So, I went onto YouTube and listened to a number of user demos and chose to buy the Compact Inline model. So, I get 10% off using the special code plus the British Pound has gone down against the US Dollar over the last few months by about 15% or more. Shipping is a bit more expensive but overall seems worth it. Just thought I would pass it along!

TomL from noisy Illinois

Thank you, Tom! I know DX Engineering also stocks BHI products here in the States, but I imagine with the currency conversion and summer sale, it might even be less expensive to order directly from BHI.

I hope you report back and let us know how well the Compact Inline filter works for you!

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