Build a bandpass filter for any band and how too tune it. DIY Bandpass filter for ham radio.

Рет қаралды 8,640

Күн бұрын

Пікірлер: 29

@witektaaham6297 Жыл бұрын

Hi, I've been playing with amateur radio for over 40 years and I still enjoy it... I spend most of my time on home-brewing and I'm still learning something, this time thanks to your video... Many thanks for the informative video... Greetings frem SP5TAA.🤝

@QSOWithACOPK4SDV-ey3fz Жыл бұрын

Sweet I'm glad it was helpful if you have any questions feel free to ask. Also, feel free to like, share, and subscribe

@KC1RWR-VE9FR 10 ай бұрын

Thanks for the demonstration! Very helpful.

@QSOWithACOPK4SDV-ey3fz 10 ай бұрын

You are most welcome.

@geekthesteve6215 7 ай бұрын

Thanks, K4SDV, for the video. It was very hard for me to hear the first part of the video as the audio was very low. It was still low during the rest of the video but better than the first part. I finally turned on the closed captions to help me understand all of what you were saying. I don't know what KZbin calls it using chapters would have also helped my following the video easier as then I would have been able to jump to those parts of the video I was most interested in versus watching the whole thing from beginning to end. Thanks for making the video and attempting to educate us on making and testing our own filters. 73 WA0A.

@QSOWithACOPK4SDV-ey3fz 7 ай бұрын

Sorry if the audio was low

@GateKommand 10 ай бұрын

Thanks for the vid mate!

@QSOWithACOPK4SDV-ey3fz 10 ай бұрын

Thank you.

@dylanschulz2404 11 ай бұрын

Excellent! Just found your channel. I have seen these kits and have considered them over starting from scratch. 73, KF0BBU

@QSOWithACOPK4SDV-ey3fz 11 ай бұрын

They are great and work really well.

@javierpolendok5mhc 10 ай бұрын

Excellent video

@QSOWithACOPK4SDV-ey3fz 10 ай бұрын

Thank you.

@Steve-GM0HUU 9 ай бұрын

👍Thanks for video. 1.08:1 VSWR is a loss of 0.006dB or 0.1% power loss. I wouldn't worry about that.

@QSOWithACOPK4SDV-ey3fz 9 ай бұрын

Thanks for the info!

@lortiz17 11 ай бұрын

Thank you for the video, are you planning on a follow on video of some band contacts with and without the filter?

@QSOWithACOPK4SDV-ey3fz 11 ай бұрын

Yes I am!

@AndyAAzeroAM Жыл бұрын

Very cool looking board, Thanks for sharing

@QSOWithACOPK4SDV-ey3fz Жыл бұрын

Thanks for stopping by and checking it out.

@andrewmcfarland57 6 ай бұрын

We're all greedy when it comes to SWR. 1) Start at 1.08 on first try. 2) Fiddle for 5 minutes to make it 10 times worse. 3) Thrash around for 5 more minutes out of frustration to get back to... 1.08 🤣

@stevec5000 6 ай бұрын

So why do you need a band pass filter?

@QSOWithACOPK4SDV-ey3fz 6 ай бұрын

A band-pass filter or bandpass filter (BPF) is a device that passes frequencies within a certain range and rejects (attenuates) frequencies outside that range. It's the opposite of a band-stop filter.

@QSOWithACOPK4SDV-ey3fz 6 ай бұрын

Field day is a good example. If I'm transmitting on 40m and the other operator is transmitting on 20m the 40m filter is rejecting his 20m signal and only allowing the 40m signals to pass through to my receiver. If that makes sense.

@macgyver5108 5 ай бұрын

Because the universe is a noisy place! If you're in a city you're surrounded by electronics, TV's, microwaves, USB chargers, dryers you name it, which all make EM noise (AKA call noise floor, all that static with squelch off) even the Sun makes a ton of EM noise. A band pass filter gets rid of strong unwanted EM/RF noise bleeding in from other frequencies so you can hear the frequency you're tuned to much better with less background noise.

@stevec5000 5 ай бұрын

@@macgyver5108 Real name brand ham radios already have band pass filters built in so no need to build any!

@macgyver5108 5 ай бұрын

@@stevec5000 true for older radios, but even spendy "brand name radios" that are newer SDR based, like say a $1400 Icom IC-7300 can greatly benefit from a larger band pass for a specific band. It's just the nature of most new SDR's, the frontend can be swamped by strong signals nearby. Like was mentioned at field day if some lid has their mic gain way up and is running @100w...