🎧 Tune In, Zone Out: Elevate Your Audio Experience!
The RTL-SDR Blog Broadcast AM Reject High Pass Filter is engineered to enhance your audio reception by effectively blocking the AM broadcast band between 500 kHz and 1.7 MHz, boasting over 50 dB of attenuation and a precise roll-off point between 2.5 and 2.6 MHz. Ideal for RX use, it features SMA Female connectors for effortless integration into your setup.
R**H
Nice!
Great product! As described!Thank You,Richard Smith@Scruffygrizbear
S**N
Keeps MW Band out of reciever front end
RTL-SDR makes good products. This little filter keeps the pesky MW bands out of my Airspy HF+ receiver front end at lower HF frequencies. Without this filter on the lower HF bands, I needed to add 20 dB attenuation to prevent the receiver from overloading thus limiting sensitivity. With the filter I can run full gain. The added bonus is the very low through-line loss all the way to 500 MHz.As you can see on the attached plot the filter meets specs. MW is down by -40 dB, -3 dB is as specified at 2.6 MHz, -1 dB is at 4.36 MHz. Midband loss is less than 0.5 dB from 5 MHz all the way up to 500 MHz.
O**N
filters out the AM broadcast band
I have one of those ATS-25 receivers where the front end is not great. My local AM station comes in along with HF signals. This device clears up that problem completely.
T**R
Works but
So it rejects the band no problem. I thought I was having an issue with interference but it really was no from radio stations. I lose about 3 db when filter is inserted. Do its dits on my desk
P**.
Didn't help my 80m reception
Seems to do its job fine, but it is not a panacea for suddenly getting clean 80m ham band signals for me like others have reported. I cannot tell a difference on that band with it in place or removed on any ham band, using a Airspy HF+ Discovery SDR and a magnetic loop antenna. So this is not a silver bullet, and may not solve your interference issues. But it does attenuate the AM band as it claims to do. May be most beneficial to proper third harmonics of AM frequencies. Also with it in place it does attenuate the 160m band as it says in the title (2.6MHz HPF, 160m band is 1.8-2.0MHz). Would be better if it had a sharper rolloff closer to the edge of the AM band like 1.4MHz so that 160m could still be used. But, it does what it says it does, and is high quality and inexpensive, so 5 stars.
T**R
It works, but not 100% of the time
It does work, just not every time. It works more than it doesn't. I've found randomly I'll pick up a local broadcast station, maybe since it's so close that's why, but most days it blocks them all out.
P**E
I will be buying more of these
Using this filter on an antenna I call a "sloper", which in my case is run with Andrew Heliax at about 110' up on Rohn 45g, with ground tied to the tower at feed point, and the center conductor terminates to around 100' of stranded copper wire suspended at about a 45 degree angle from the tower. Yes it's primitive. Instantly the filter made a world of a difference on the MSI-SDR. Proof is in the waterfall showing the broadcast band with 75/80 meters picking right up. I was not expecting this, and I will be buying another. Can't wait to try it with RSPDX in HDR mode.Looking at my waterfall screen capture, the bottom half is the same system without the filter. The top half is the same system with filter and the included SMA M-M adapter in line. I'm quite amazed.
A**R
Works very well!
This item works very well, so far as I can see in my short tests. I have a massive AM station a couple of miles to my north, at 50KW during the day, and it splattered all over the bands, with harmonics everywhere.As long as I connect this filter *directly* to my SDR (an SDRPlay2) with the included adapter, the station is just gone, and I can hear other signals (except in the filter's blocked range) quite nicely.If I connect it via a balun or feedline, the interference is back: I'll try various shielding strategies, but as long as the shield is there after the filter, all is well.Shipped promptly, arrived in good order (had one tiny screw on the case loose, easily fixed)
Trustpilot
3 weeks ago
1 month ago