Low Pass Filter for Ham Radio

In this video, we take a look at a Low Pass Filter Kit that I got off AliExpress.
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Links to products in the video:
www.amazon.com...
NanoVNA: amz.run/5gpY
AmScope Solder Vise: amz.run/5gpc
As an Amazon Associate, I earn from qualifying purchases.
Filter Kit: www.aliexpress...
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[@HamRadioDX]

Love me a good Ape build! Nice one mate, low pass filters are super handy

[@TheSmokinApe]

Thanks for checking it out Hayden!

[@HOAHamRadio]

Dang that's a lot of toroid wrapping! Nice solder work.

[@TheSmokinApe]

It was a lot of roid work. Thanks on the solder, my near field vision has gotten so bad I couldn’t tell 👀

[@MakeDoAndMend1]

I found with mine. For each band I swopped over the windings. For example the toroid with most windings was soldered into board where the least windings etc. Works perfectly on correct freq. I will do a vidd soon. Cheers from old George

[@TheSmokinApe]

Thanks George! I will try this!

[@MakeDoAndMend1]

Swop the coils over. L1 into L2 etc. Works much better. Great video. Cheers from old George in the UK

[@TheSmokinApe]

Thanks George! I will try it!

[@hamradiotube]

I don’t know what I was thinking, I was prob hungover lol! I’m cracking up man.

[@TheSmokinApe]

Keeping it real 🤘

[@temporarilyoffline]

That's a great start, what's next?

[@TheSmokinApe]

I want to locate the actual schematic and find out the inductance values for the toeroids.

[@temporarilyoffline]

@@TheSmokinApe LCR Meter?

[@TheSmokinApe]

@@temporarilyoffline that’s what I would use measure it, I don’t know what the recommended values are and that’s why I want the schematic

[@temporarilyoffline]

@@TheSmokinApe Sounds like a plan, looking forward to it!

[@TheSmokinApe]

Well, chip chop on the schematic!

[@FEPLabsRadio]

Good job, Primate! I thought the shoulder would be a little sharper

[@TheSmokinApe]

You and me both!

[@DonzLockz]

I also enjoy your Clarence impersonations too!🚜😁

[@TheSmokinApe]

Haha, thanks Don

[@youtubeaccount931]

I dig your builds! I need a CB band stop filter for 10 meters lol. I get all kinds of artifacts on the SDR, the yaesu is better. There's probably some big power CBers in my area.

[@TheSmokinApe]

Some of those guys run some serious power 👍

[@youtubeaccount931]

@@TheSmokinApe Gotta keep the clouds warm

[@ferdinandwp4rjl377]

Great job APE, Thanks for your videos and tutorial. 👍🏽

[@TheSmokinApe]

Hey Ferdinand, glad you like them!

[@ferdinandwp4rjl377]

YES I like your videos. Hey were did you get the nanoVNA cables?

[@TheSmokinApe]

I believe these came with one of my VNAs

[@ferdinandwp4rjl377]

@@TheSmokinApe Great thanks for answering. I thought they came from eBay. 👍🏽 73

[@HamRadioCrashCourse]

SO many toeroids!

[@TheSmokinApe]

Was the worst, I had to label them so I didn't get confused 😯

[@edbeckerich3737]

Shielding between the toroids would help also

[@TheSmokinApe]

Yeah, I could see that

[@johnbauman4005]

Hi Ape! Enjoyed this! At 17:15 you say you have the filter set for 20 MHz. How? Perhaps related to the positions of the two switches? Not sure what the switches do - add/remove capacitors/inductors to the circuit? When happy with the tuning of the filter, where do you add it to your rig? I expect you might want to put it in a box to protect the circuitry also? Shape of filter looks kind of like a lower order Butterworth, but I guess the kit didn't come with that info. Thank you for the edumacation and your patience. KK7JBZ

[@TheSmokinApe]

Hey John. Yes, the switches on the side change frequency by routing the RF through different capacitor / toroid configurations. I do want to see if I can get a 3d print to house it.

[@technishn]

Its quite possible that the capacitors are not NP0/C0G especially if values are above 100pF. The rolloff or -3 dB point droops with inferior capacitors. NP0 COG either have a black mark on top of have NP0 C0G marked on the capacitor

[@TheSmokinApe]

Yeah, I suspect something is going on with them. Also, out would be nice if I could find the values for the inductors so I could check them with the meter.

[@Tump2010]

good build video

[@TheSmokinApe]

Thanks Thump!

[@kevinkc3onohelijeepworld953]

Neat device 😉

[@TheSmokinApe]

Thanks Kevin, kept me busy for a few days!

[@mrtechie6810]

Why did you choose that model instead of the bigger boards with relays?

[@TheSmokinApe]

It was a simple easy kit build that I thought would be good for a video

[@mrtechie6810]

I am looking at bandpass filters now....

[@TheSmokinApe]

I have a few videos on them that might help...

[@lyledal]

I'm not convinced that it is ever possible to have *enough* junk around the shop.

[@TheSmokinApe]

I fit into that demographic.

[@joe10117]

Aug 2023 any way to block ham radio interferrnces on tv ????

[@TheSmokinApe]

Are you talking about the transmitted signal causing problems or RFI? First I would check to see if the radio is producing harmonics and then I would install RFI chokes at both end of the coax. Good luck, problems like this are a bitch.

[@frequencywatchers]

Great Video On How To Solder The Components And Good on Instructions Of The Device, THANKS. For Now Im Using My Own Made LPF, Works For So Much Bbands, From 80Meters Up To 15 Meters, Its Variabble Too, But With Vairable Switch, Not A 3 Position Switch As In Video, I Need To Make A Video On Hwo I Made My Ownn Filter, Its All From OLD USSR Surplus Items, Even The PCB Is My Own Made, Just Glued Old USSR Copper SHeet To Old USSR Semi Conductor Material Thats Non Cundoctive And Made The Cuts Where Itt needs To be And Used USSR Surplus Components, Capacitors And resistors And Other Stuff, AND IT WORKS SUPERGOOD, Check Out My latest Video, That Is WITH THAT FILTER Im Talking ABout, if i Connect the Antenna WITHOUT The Filter, ITS ALL NOISE, No Nothing, Just Noise..

[@TheSmokinApe]

Sounds like a cool project, I will check it out 👍

[@Bill-HRT]

Thanks! I think I learned something today. 73 de K0WHW @Bill-HRT

[@TheSmokinApe]

Thanks for watching HRT 👍

[@DonzLockz]

I always like your tech videos Mr Ape but my OM eyes need a microscope to "sodder" them up.🦮👨‍🦯😆

[@TheSmokinApe]

I’m telling you. I can’t see shit these days and it’s a bit of a hassle 🔎