So for some reason, I removed my ICE BCB filter inline with my Perseus SDR. I was experimenting with a couple of filters several months ago and (I guess) I removed all of them to prevent any signal loss. Well that proved to be a bad strategy.
Here's what my HF spectrum looked like with no filter:
You can clearly see the 3-4 Mhz "hash" that is developed due to the MW signals overloading the Perseus SDR.
The broad (40Mhz view) isn't very accurate... here's a zoomed-in 10Mhz view:
Here's a view of my older ICE 402X High Pass Filter:
As you can see from the above, it does "something" although the attenuation isn't steep enough and there's very little insertion loss until about 1.2 Mhz -- the top end of the band is still blasting through.
Here are a couple of pictures of the ICE 402X filter:
After some online searching, I found several BCB filters. Prices were fairly steep. One costs $195 and the other $225 with a 3-week wait.
Andy Ikin of Wellbrook recommended I talk to Jack Smith @ Clifton Labs. After several emails, Jack steered me in the right direction. He also added a BNC female instead of the usual SO-239 connector. This way I can use a short BNC jumper to my Perseus and rid myself of another RF adapter. It's a very clean, professional design.
The Z10023A Elliptical Filter:
...and check out the results:
Wideband:
And zoomed-in at 10 Mhz:
So if you're not hearing any signals in the lower HF frequency range AND you live in a suburban environment where AM BCB signals are very strong then you may want to consider a filter. It could possibly improve your reception.
Clifton Laboratories Home
Here's what my HF spectrum looked like with no filter:
You can clearly see the 3-4 Mhz "hash" that is developed due to the MW signals overloading the Perseus SDR.
The broad (40Mhz view) isn't very accurate... here's a zoomed-in 10Mhz view:
Here's a view of my older ICE 402X High Pass Filter:
As you can see from the above, it does "something" although the attenuation isn't steep enough and there's very little insertion loss until about 1.2 Mhz -- the top end of the band is still blasting through.
Here are a couple of pictures of the ICE 402X filter:
After some online searching, I found several BCB filters. Prices were fairly steep. One costs $195 and the other $225 with a 3-week wait.
Andy Ikin of Wellbrook recommended I talk to Jack Smith @ Clifton Labs. After several emails, Jack steered me in the right direction. He also added a BNC female instead of the usual SO-239 connector. This way I can use a short BNC jumper to my Perseus and rid myself of another RF adapter. It's a very clean, professional design.
The Z10023A Elliptical Filter:
...and check out the results:
Wideband:
And zoomed-in at 10 Mhz:
So if you're not hearing any signals in the lower HF frequency range AND you live in a suburban environment where AM BCB signals are very strong then you may want to consider a filter. It could possibly improve your reception.
Clifton Laboratories Home
Last edited: