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Comet

Comet CTC-50M Window Feed-Thru Jumpers RG-58 Coaxial Cable 50 Ohm 3 Feet with SO-239 Connectors for Mobile and Base Station Antennas

Based on 43 reviews
Condition: New
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$59.99

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Availability: In Stock.
Fulfilled by Amazon
Arrives Friday, Oct 30
Order within 11 hours and 49 minutes

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At a glance

Condition
New
Model
CTC-50M
Color
Black
Connector Type
So-239
Cable Type
Coaxial
Connector Gender
Female-to-Female
Frequency
3 GHz
Warranty
1 YEAR
Works with
ham devices, GMRS devices, scanners

Features 5

  • The Comet CTC-50M Window Feed-Thru Jumper provides a secure, low-loss connection for antennas through walls or windows, ensuring consistent signal strength for mobile or base stations.
  • Constructed with RG-58 coaxial cable, this 50 Ohm jumper is designed for minimal interference and maximum signal integrity, ideal for VHF, UHF, and HF frequency applications.
  • Includes SO-239 connectors on both ends for fast, reliable attachment to antennas and radios, compatible with most mobile, base, and handheld antenna systems.
  • With a 3-foot cable length, the CTC-50M allows flexible placement of antennas outside while safely routing signals indoors, making it perfect for apartments, offices, and vehicles.

Description

The Comet CTC-50M Window Feed-Thru Jumper is engineered for amateur radio operators, emergency responders, and professional communications users who need a secure, low-loss connection for routing antenna signals through walls or windows. This 50 Ohm coaxial jumper features RG-58 cable construction and SO-239 connectors on both ends, providing a reliable interface between mobile, base station, or handheld antennas and radios. At 3 feet in length, the CTC-50M allows flexible antenna placement outdoors while keeping your equipment indoors, ideal for apartments, offices, vehicles, or temporary emergency setups. Its durable and flexible design ensures long-term performance, minimal signal degradation, and resistance to bending or environmental stress. The cable’s low-loss properties make it suitable for VHF, UHF, and HF frequency applications, maintaining clear reception across a wide range of monitoring and operational scenarios. Whether for professional communications, amateur radio monitoring, or emergency preparedness, the Comet CTC-50M ensures consistent, high-quality signal transmission. Its compact, lightweight design combined with rugged materials makes it a versatile solution for any antenna installation where a window or wall feed-through is required. This jumper is a must-have accessory for users seeking reliable RF performance without compromising convenience or installation flexibility.

Specs 20

Brand Comet
Connector Type So-239
Cable Type Coaxial
Special Feature Applications Handheld scanners, receivers, spectrum analyzers, Connector Type BNC Male, Construction Flexible rubber whip with metal base for durability, Frequency Range 25–1300 MHz (Receive Only)
Other Special Features of the Product Applications Handheld scanners, receivers, spectrum analyzers, Connector Type BNC Male, Construction Flexible rubber whip with metal base for durability, Frequency Range 25–1300 MHz (Receive Only)
Connector Gender Female-to-Female
Number of Pins 1
Frequency 3 GHz

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Oct 30

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews

Worth the price of admission
Review Image by Dave
This pass through is very good. It's a significant improvement over the cheaper coaxial pass throughs you'll find in terms of build quality, durability, and their relatively low attenuation of signals. The attached measurements were performed on a nanoVNA through its included RG-316 jumpers and calibrated at the end of the jumpers. My measurements show a through loss of under 2 dB with an SWR under 1.1 for the entire range of 160m-10m (1.8 MHz through 29.7 MHz). This is a massive step up from the cheap ones, which are a gamble at best: some are nearly this good, others are catastrophically bad, and all of those are very, very fragile. ... show more
Reviewed in the United States on April 7, 2026 by Dave
Excellent For GMRS Station
Review Image by Rachel
Review Image by Rachel
I was worried about signal loss but it's not a problem at all.
Reviewed in the United States on June 22, 2026 by Rachel
Good Quality and Works Well
This is my second one as the first one is still working well after a few years of abuse. If you don’t want to make your own or buy an expensive and proper window pass through then this is a great alternative.
Reviewed in the United States on May 15, 2026 by Ham Radio GMRS Test and Review N8DAV
Pleased with performance over the last two plus years.
I have used 3 of these for over 2 years for AMATEUR and GRMS Radio Communication. They work very well. Unfortunately, the more antennas you buy the more you need these feed-thru devices. I am renting and my landlord trusts me to not hurt the property.
Reviewed in the United States on September 10, 2026 by neuronweb
Essential for cable pass-throughs. Rate: 10 stars
These are great!!! I wanted to add two more antennas, already had one of these running for over five years. Really, having one of these in your cable bag is a great thing if you want to connect to an antenna and you have a window that opens nearby. I'd give 10 stars if I could.
Reviewed in the United States on February 18, 2026 by jkbMN
Very satisfied
Very satisfactory solution to the problem of passing my radio cable through the window so I didn't have to drill or cut through the wall. Did not cause any degradation of signal
Reviewed in the United States on March 11, 2026 by Carol P
Worst Mistake Ever!!!
Won't work with a window which is kind of the point. The Window will break the wire. Just use copper wire and tape. For all you who can't get this to work it's because it's a POS and cuts the wire. Terrible product.
Reviewed in the United States on April 27, 2026 by Dingo The Pet Berry Tree Hunter
Works great! Durable! Worth the money!
Great product!
Reviewed in the United States on April 29, 2026 by Not sturdy at all
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