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The Aussies are doing some cool radio mods

loosecannon

loosecannon

Sr. Member
Mar 9, 2006
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found this video while looking for something else.



I really like the way he shows his testing, and the add-on for the digimax is super cool, but the thing i liked the most was the internal DSP board he installed.

I have messaged the guy who made the video for some details on the install, but it probably just involves removing a series capacitor somewhere right after the detector or something like that.

I found the website for the people who make the DSP board and it can be bought for just over 100 dollars.
not sure i want to make the investment yet, but maybe someone else does.
on the video, the results were pretty dramatic.

https://www.bhi-ltd.com/noise-cancelling/pcb-modules-low-level-audio/nedsp900.html

Does anyone here know of anyone in the US who is using these or similar DSP boards inside radios?
LC
 
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Let me just say that I know of a group that is secretive in their work.
Look hard at the video, then you might know at least two of the people in the US that can answer your question.
I just can't say publicly.
 
Nothing like that.

I only know about it because I was invited.
I know one of the people in that group.
 
Are you talking about this guy?

DSP.jpg

I hate to tell you, but comparing a Pierce-Simpson Bengal to a say.. Uniden Washington is not exactly a fair fight...

When the website mentions patented Algorithm - well, it requires a bit more than a simple CPU - at least for the dynamic streaming part - The board above, in the photo is not the websites version so since this is only one side of the story I'll need some more.

Now I messed with Lou Franklins' version of the DSP and all four Op Amps were used in it - so this one is a bit more complex yes, but again, PIC's and Adrino have some limitations. Audio processing is possible but the support is a little more complex.

But any form of audio processing in compression and dynamics can help any radio - but again the comparisons need to be more balanced - I don't doubt the efforts made in the video.

They did a good job. But all the changes - what started out as a Bengal - would up as ... something far different. They spent a fortune of effort and resources and money to obtain these results - so the prototype seems to work, but is it transferrable?

Stay tuned

:+> Andy <+:
 
Andy its a digital signal processor not a dynamic speech processor. It is meant as a noise reduction in receive. Does not do anything on transmit.

On his Facebook page he said he basically just had to remove c76 and put it in line.

Apparently these are marketed towards the Kenwood and Yaesu crowd but can be made to work in many radios.

The version he has is obsolete but they have a newer version which looks to be basically the same thing.

The American arm of bhi is the gap antenna company.

LC
 
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Oh that's ok, they went all out on a lot of different stuff on the radio so to say this was once stock would be correct, but what it wound up as - was a beautifully annoying blue light spectacular that although fun to watch and play with - well, kinda hurt me to see an otherwise perfectly good radio heavily converted.

You're talking to a son of a fathers' radio - he liked them and had good memories but they're gone.

Washingtons' "Looks" are about as close to it as I'm ever going to see one, and to me that's enough.
 
i getcha Andy.
I am definitely not a purist when it comes to keeping radios 100% stock.

I won't drill a hole in a radio but i will re-purpose an existing switch if need be.
I adhere to the 'can it be returned to stock later' point of view.

i used to put blue LEDs in my radios probably 12-13 years ago, but i went back to red in all my stuff quite a while back.
LC
 
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The BHI products only remove interference in the audio, they don't move an interfering RF signal so if the unwanted noise is stronger than the wanted signal you're still going to get it interfering albeit without the audio.
 
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