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Contour Boost or Cut?
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- čas přidán 19. 08. 2024
- A couple of viewers asked why I don’t use the Contour filter to boost, rather than cut. Think of the Contour as a wide version of the manual notch filter. It’s a parametric equalizer. You control the center frequency, the width (aka Q), and the cut or boost amount. In this video I show both cut and boost and explain why I usually prefer to cut rather than boost. It’s a matter of personal preference, and probably varies according to a person’s hearing. I have an aversion to high pitched noise.
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73, de N4HNH
Great information. Understanding the contour settings and how to use it in concert with DNR.Thank you Sir
You’re very welcome! 73, Doug
Thanks for Contour information. I prefer boost contour in my ft2000 because you have the Notch option too for parametric way to cut sound and then you have two ways for clarify the signal, boost and cut at same time. 73s EA4IS
I understand but my notch is sometimes tied up cutting out local heterodyne from the neighborhood. 73, Thanks for watching!
Great video! Helped me with my 101d. Subscribed
Welcome to my channel! I hope you enjoy the content.
73, de N4HNH
I ended up ordering the FT3DR. Should be here Thursday. Maybe you can do a few more videos on that radio. Your HF radio there is a hoss. I like the way you show how to filter the signal so that you can get the best sound. I try to translate that over to my IC-7300. Pulling up a weak station can be pretty rewarding. Thanks for the video.
Hi Don! There are several videos about the FT3DR on my channel. I think there are 4. There is a lot packed into that little radio. 73, de N4HNH
Much more intelligible with the boost! 😁
Doug: Do you have an "explicit" video explaining the FT-891 set-up procedure for CW? The manual seems to be a little too simplistic, which leaves me to think there's more capabilities. Thank you.
Philip, you have inspired me to create such a video. Keep a watch out for it. 73, Doug
Cut not boost for me on all my Yaesu radios 73 Tony
Me too, Tony. I guess I just don’t like noise.
73, Doug
Does using the contour on the 5k attenuate the signal?
Contour doesn’t attenuate the RF, but notch and width can have an affect on the S-meter reading. The S-meter is driven from the AGC circuit. A super tight bandwidth and/or notch can decrease the amount of signal that enters the AGC, thus the S-meter readings will be lower. It doesn’t matter to me. I’m going for the best S/N ratio, not the meter reading.
73, de N4HNH
Help me understand the use or benefits of contour for someone without a yaesu.
Seems like around 1800 may be shifting the dnr so to speak.
Contour is like a wide notch filter. I simulated contour in one of the IC-7300 videos by setting its manual Notch filter to wide.
When you are struggling to pull out a weak SSB station, sweep the Contour filter at somewhere between 1800 and 2200 Hertz. You can knock down the noise floor near the frequency where the majority of intelligibility is with a SSB signal. Forget about audio quality. When you use Contour, you are simply trying to pull out the missing words or syllables of a weak station, or maybe trying to hear the missing letter or number in a callsign.
While you can simulate a Contour filter by setting Notch to wide, an actual Contour filter can be more effective. Yaesu allows us to set the width and depth of the Contour filter. And we still have our Noise Blanker available, in case we need it.
Note that a combination of Contour and Digital Noise Reduction might help even more, when trying to pull out the weakest of the weak. If you set DNR much higher than 7, you might want to consider narrowing the width or decreasing the depth of the Contour filter. But I find that a DNR setting of 3 or 4, in combination with Contour at a depth of -15 and width of 9 or 10, is usually enough.
Contour can also help with CW. Set the Contour at 350 Hertz +/- 50 Hertz, and Contour can help with filter ripple. If you use both Contour and the “Notch Trick” I show in many of my videos, you can virtually eliminate any of the ringing sound you get when you narrow your CW filter to 150 Hertz or less, while trying to block QRM.
73, de N4HNH
@@n4hnhradio thanks so much
I’ll try using manual mitch on the k3. Thought manual notch was just for cw. Thanks again
Manual Notch is normally for SSB, but I use it to minimize CW filter ripple. I go into the menu and set Manual Notch to narrow. I then enable the Manual Notch filter and set it to 80 Hz below the CW pitch I use, which is 600 Hertz. Depending upon the amount of ripple I’m hearing, I might “sneak” the Manual Notch frequency up to within 50 or 60 Hertz below the CW pitch (sidetone) frequency.
73, de N4HNH