Welcome to
C3 Electronics LLC
Wisconsin's Bandpass Filter Resource
WIPOTA is Approaching
this coming Saturday, Sept. 21st!
For More Information:
https://wipota.com/
Get your bandpass filters Now!
HIGH-QUALITY, PRECISE PRODUCTS
C3 Electronics LLC takes pride in manufacturing high-quality bandpass filters for amateur radio enthusiasts looking to suppress RF interference while operating in close proximity with other operators.
Our products work great for Field Day operations, POTA, in campers or apartment complexes, or whenever you want to work closely with friends or other operators on amateur radio HF bands.
We are passionate about satisfying our customers amateur radio experiences with our products. Visit our Shop page to place an order or visit one of our booths at swapfests to see the quality of our products being displayed or Nano VNA tested.
Locally made in Wisconsin...Help Keep America Great--Buy Our USA Made Products!
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Sleek Design
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Quality Tested for Low SWR and Low Insertion Loss
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Quality Workmanship
and Low-Cost Product
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Available in 10M, 15M, 17M, 20M, 40M, 60M, and 80M Bands
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SO-239 Connections to the radio and antenna
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1-Year Repair/Replacement Warranty
Partial Inside View
REFINING YOUR SIGNAL EFFICIENTLY.
Empower
Growth
Have you encountered a Field Day or POTA activation that has interference from other operators transmitters? Would you like to transmit without disrupting other amateur operators?
C3 Electronics LLC has a solution to reduce unwanted interference through the use of low-cost, highly-efficient bandpass filters built in Weyauwega, WI.
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C3 Electronics LLC manufactures a signal processing filter to provide a very tight frequency response in the passband. Our filters have a -3dBd cutoff point (low-cutoff and high-cutoff) that indicate points on the lower end and upper end where the power reduces to half. Our products are rated to 100 watts or less and provide quality SWR and insertion loss readings.
If you are looking for a bandpass filter with no ripple in the band pass or stop band, our filters provide you with the best solution between attenuation and phase response.
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See our bandpass filters in action in a video below and view our product review page to hear what other customers think about our products.
Do you like contesting with other operators?
Enjoy amateur radio contesting
in close proximity with your friends!
C3 Electronics LLC has the solution for you!
Watch this video to see how close we operated together on 20M and 40M with our transmitters and antennas very close!
Our bandpass filters can be utilized for more than Field Day or POTAs...
they work Great for Contesting too!
Find out how our bandpass filter worked at Field Day 2024 with Michael Martens (KB9VBR) by watching his YouTube video.
In the video, you will see the close proximity of antennas and transmitters used with our 20M bandpass filter that KB9VBR used and made the most contacts during Field Day with. Check out other YouTube Videos on Michael's YouTube Channel to see other amateur radio ideas.
Video Source: https://youtu.be/UVYG-PXWWLU?si=25s20_EQqSFp9VyX
Find out how our bandpass filter worked at a POTA (Parks on the Air) activation on July 9th, 2024.
In the video, you will see the close proximity of antennas and transmitters used with our 20M bandpass filter that KD9QXL used and made the most contacts during the day with. His son used my callsign W9PIO on 10M with our 10M bandpass filter while I monitored and took a video of our POTA activation. 10M was slow, but 20M received a lot of contacts.
No RF interference happened to either operator while transmitting on either the 857D or 991A. Antennas where no more than one car length apart.
Watch the video and then Shop Our Products.
POTA activation at Tomorrow River State Trail in Ogdensburg, WI.
POTA Park # US-9815
Competitor Comparison
C3 Electronics LLC
20M Bandpass Filter
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SWR 1.028
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Insertion Loss 0.69 dB
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Test Frequency 14.320 MHz
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Company began in May 2024 and has several bandpass filters in stock ready to ship on these bands:
10 M - 15M - 17 M
20M - 40M - 60M - 80M
Dunestar 20M Filter
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SWR 1.286
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Insertion Loss 3.35 dB
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Test Frequency 14.040 MHz
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Company closure in 2023 (See Note below)
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