4.28.25 new 

C40 Tuned UHF Portable Radio Antenna

for the  Moto APX  N30, N50, or N70  Digital Two-Way Radios

Our C40 Tuned 2.15” Short Stubby UHF Antenna is made in the USA and is a high performance upgrade to the taller Moto OEM AN000452A01 UHF whip antenna.

Each antenna is fine-tuned by hand using laboratory grade test equipment to deliver absolute maximum communications performance with real certified results over specific and guaranteed frequency range variations in the UHF radio band from 406 MHz to 512 MHz.  This antenna will ignore and reject undesired radio signals outside of the UHF band that may cause interference and it does not have GPS capability.

Please be absolutely certain that your portable radio communications are in the UHF frequency range!  If you need to know what frequencies a specific agency is using for their radio communications please email us before making a purchase.

 

This antenna fits and is compatible with the following specific Moto APX portable radio models that operate in the UHF radio bands and have no need for GPS;

APX Series; APX N30,  APX N30,  APX N70

 

FACT:  A  BIGGER  untuned antenna is usually NOT better,

it is just really    BIG !

  

Why continue to operate with an ordinary mass produced Cheap portable radio antenna with an Unpredictable performance? 

STEP UP to the TRUE LEVEL of Portable Antenna Performance Right Now!

Unleash the full potential of your portable radio with our Custom TUNED antenna! 

For a Very HIGH Performance & HIGH Quality Antenna just use the “Buy It Right Now” feature!

  

IMPORTANT:  Please do not make any purchase until you know for sure what UHF frequencies are being used in your portable radio.

If you use a repeater system you will need to know both the input and output frequencies.  Assistance is available to help determine your frequency range needed.  Please email us with as many details as possible before you make your purchase.

 

C40 Ordering Instructions: Please choose the frequency range that you need from the following list of 15 different UHF antenna variations available;

Choice         Frequency Range                                  Typical Usage

A                  406 – 422 MHz . . . ALL US Government agencies, Emergency location beacons, and the US Postal Service.

B                  420 – 439 MHz . . . Amateur radio 70cm (lower part).  Also some Police, Fire, Rescue, and Municipal radio systems on or near the Canadian border.

C                  430 – 450 MHz . . . Amateur radio 70cm  (some of the lower part 430 - 440 MHz and all of the upper part 440 - 450 MHz).

D                  440 – 450 MHz . . . Amateur radio 70cm, optimized for peak 440 - 450 MHz use only (upper part of 70cm band).

E                  440 – 460 MHz . . . Amateur radio 70cm (upper part 440-450), Broadcast Radio & TV, Commercial, LMR, Police, Fire, Rescue, Municipal.

E+                440 - 475 MHz . . . Extended frequency range that covers of the uses listed for antenna variation E and antenna variation F.

F                  450 – 472 MHz . . . Auto racing, Motor Sports, Broadcast Radio & TV, Police, Investigation, Tactical, Security, Fire, Command, Rescue, GMRS (general mobile service), FRS (family radio service), Municipal, Schools, Commercial, Manufacturing, Industrial, Itinerant, LMR (general land mobile radio), UHF T-Band 470-472, and Transportation.

F+                450 – 485 MHz . . . Extended frequency range that covers of the uses listed for antenna variation F and antenna variation G.

G                 460 – 482 MHz . . . This frequency range is the most common and most used part of the UHF band. Used for Police, Investigation, Tactical, Security, Fire, Command, Rescue, Municipal, Schools, Building management, Property management, Life Safety management, Building engineering, Commercial, Retail business, Manufacturing, Industrial, Itinerant, GMRS (general mobile service), FRS (family radio service), UHF T-Band 470-482, LMR (general land mobile radio), Transportation, and SMR trunked networks. The majority of  digital systems using the XPR model radios also operate in this frequency range.

G+               460 - 495 MHz . . . Extended frequency range that covers of the uses listed for antenna variation G, antenna variation GMRS, and antenna variation H.

GMRS          462 – 468 MHz . . . For absolute Maximum Performance in the GMRS (general mobile service), and FRS (family radio service) radio bands.

H                  470 – 495 MHz . . . UHF T-Band (lower part), Police, Tactical, Fire, Command, Rescue, Municipal, Commercial, SMR trunked networks, Industrial, Transportation.

H+                470 – 512 MHz . . . Extended frequency range that covers of the uses listed for antenna variation H and antenna variation I.

I                   482 – 512 Mhz . . .  UHF T-Band (upper part), Police, Tactical, Fire, Command, Rescue, Municipal, Commercial, SMR trunked networks, Industrial, Transportation.

Z                     xxx - xxx MHz . . .  Special Custom Frequency Variation for the 400 to 525 MHz UHF frequencies with up to a 35 MHz wide maximum bandwidth.

 

C40 ANTENNA TECHNICAL INFORMATION

          This UHF antenna will not operate at all in the Vhf, 700, 800, or the 900 MHz bands.

          Our antenna performance is certified and graphed as shown in the photos.  The threaded stud bottom of our C40 antenna has a dual color stripe made across the bottom face for easy identification of our high performance tuning.

          Our tests include the antenna checked in two positions; on a portable radio held in hand in front of the user’s mouth, and on a portable radio using a belt clip on the hip with a remote speaker microphone.  All tests must pass for the antenna to be released for sale.  If you are using a remote speaker mic the coiled cord will need to be kept physically away from the antenna area for maximum performance.

          This custom tuned C40 antenna will be approximately 2.15 inches tall with a tolerance of ± 0.125 inches as measured from the bottom of the antenna radome to the top cap of the antenna.  The antenna covering is made of black rigid PVC and has a bottom weather O-ring to protect the RF connection on the radio housing.  All reworked internal helix antenna connections are silver soldered.

          The retuning of the known-brand antenna achieves up to a +3db signal gain that could effectively double your transmit and receive signal power due to the very low VSWR and excellent 50 ohm impedance match as compared to ANY untuned antenna.  Our retuning also allows for a much smaller antenna height without any loss of performance and by eliminating all of the unused open space inside the antenna.

 

Our UHF Antenna meets all of the following criteria

• Built from a new known-brand quality antenna and is NOT a Cheap, Junk, or Aftermarket “Look-a-Like” Clone copy from China.
• Be as short as physically possible for a low profile with great communications range.
• Must be professional looking on the portable radio.
• Exhibit an excellent resonance only in the UHF frequency range variations.
• Use a threaded stud connector to properly fit the Moto APX N30, APX N50, and APX N70 portable radios.
• Must maintain all specifications over the temperature range of -20 to +120 degrees Fahrenheit.

 

MORE ANTENNA THEORY KNOWLEDGE

            It is a fact that the most important part of any radio communications is the antenna system.  The antenna is the device on a radio that converts RF power into radio waves during transmit and radio waves into RF power on receive.  All transmitted and received signals must pass through the antenna system for any radio to work.  On a portable two way radio, the complete antenna system consists of the actual external antenna used in conjunction with the metal portable radio chassis and the portable radio battery.

            A respected radio engineer once said, “If you only had 100 dollars, invest 99 dollars in the antenna system and 1 dollar in the radio and you will always have great communications”.  After many years of our own experience we have found that this statement to be true especially for today’s FM narrowband radio communications. We have witnessed portable radios worth thousands of dollars using cheap OEM antennas get beat out performance wise by users with radios one forth the cost using our fine-tuned antennas.

            VSWR is the efficiency measurement ratio of RF power that is being converted into radio waves by the antenna system as compared to the RF power that is not converted and reflected back into the radio as wasted heating energy.

            A VSWR of 1.5:1 has been and still is the customary maximum upper limit used in professional land mobile radio communications to determine a GOOD efficient transfer of RF power.

            Any VSWR above 2:1 is definitely BAD for the performance and the long term health of the radio RF power output amplifier.  Sadly many companies that manufacture products in China now use a VSWR of 2:1 as their good reference point to market their poor quality products and make wild claims to be way better than what they actually are.

            Our C40 antenna models are NOT made to operate in the Vhf 140-174 MHz, 762-870 MHz, or 896-940 MHz radio bands even though it may fit fine.  Matching the antenna frequency tuning to the programmed operating frequencies in your portable radio is extremely important.

            Please see our listings for many other high performance Vhf, UHF, 700, 700/800, and 900 MHz portable radio antennas.  Please ask us if you need help and we will be glad to assist you.

            We have built hundreds of thousands custom tuned antennas for our customers with excellent results and zero defects.  Our company has over 40+ years of experience in creating high performance and cost effective antenna solutions.

 

LISTING TERMS and CONDITIONS:

• Our terms and conditions as listed below will not be modified in any way after the item is purchased.
• FYI: Just because the antenna purchased fits on the portable radio and looks great does not guarantee communications performance.  You must verify the tuned frequency range of the antenna purchased matches the actual frequency range used in your portable radio.
• We will not be held liable for performance problems caused by any antenna being used outside of their tuned frequency range or due to the wrong antenna frequency range chosen by the buyer.  It is the buyer’s responsibility to verify what specific frequencies or the frequency range needed.  A UHF antenna will definitely NOT work at all in the Vhf 140-174 MHz, 700, 800, or 900 MHz frequency ranges.  Just because the antenna fits and looks great on your radio does not mean that it will work properly.  Matching the antenna tuned frequency range to your radio operating frequencies is extremely important.
• Items will be shipped to the confirmed eBay address only.
• All orders valued over $700 will require a signature for delivery.
• Any buyer abuse, fraud, tampering, or illegal activity will not be tolerated and eBay will be notified of the situation.
• Please be aware if these terms and conditions are not met, eBay will be notified of Non-Performing Bidder, appropriate bidder feedback will be given, and the item will then be relisted for auction again.
• All photos, images, and text used in the auction are all the IP (intellectual property) of rcbi.

SHIPPING:

• We promptly ship out all orders within 1-day with shipping insurance and tracking.  Shipments can be delayed for many reasons that are completely out of our control and we are not responsible for.  You need to be patient with your package delivery time frame.  We have done our job when we drop off your order with the shipping carrier and now it is up to the shipping carrier to do their job to deliver your package in a timely manner.
• Purchases that require customization or adjustments may require an additional 24 hours of time to prepare prior to shipping.
• Purchase as many items as you want at the same time in the eBay Shopping Cart and we will combine them in one cost effective shipment for you.  We will issue you a refund for any excess shipping costs you may have been charged by eBay.
• Shipping insurance and tracking is always included in the shipping cost.
• No local pickup is offered.

Your Shipping Choices

• USPS Ground Advantage shipping service is the lowest cost shipping method and it has become very unpredictable.  It does not offer any defined or guaranteed delivery date.  Most packages have arrived in a somewhat timely manner; however some packages can take more than 2-4 weeks to be delivered because of serious misrouting issues due to the USPS new reorganization, the new consolidated sorting facilities, lack of efficiency, and Holidays.
• USPS Priority Mail shipping generally tends to get to you faster and costs more; however the estimated delivery date is not guaranteed and it too can take extra time to receive your package.
• UPS Ground shipping by the United Parcel Service Company is usually very reliable and timely under normal conditions but costs more.  Prices are slightly more than the USPS Priority Mail rates.
• USPS Express Mail shipping is extremely fast in 1-2 days and costs much more.  It offers a very well-defined and guaranteed delivery date.  If the USPS Express Mail shipment is not delivered by the delivery date, the shipment costs are refundable.

US Postal Service Rules for all late and missing deliveries:

·       Step 1. If your package has not been delivered by the Estimated Expected Delivery Date, we have to wait until after this date to be able to submit a Help Request for USPS to look into the late delivery.

·       Step 2. If the shipment still has not been delivered within 7 business days after we submitted the Help Request, we can then submit a Missing Mail Search request for USPS to try to locate your late or missing package.

·       Step 3. If your USPS package has not arrived within 30 days, we can then submit for a Full Refund Request with the USPS for the lost shipment.

·       Step 4. After we receive a confirmation for the Full Refund Request from USPS, we will then send you a full refund or ship you a replacement order at no additional cost.

 

RETURN POLICY:

• Within 60 days of the auction close if; you are not satisfied with the item, you changed your mind, have buyer’s remorse, or made a mistake, you may return the item in the same condition as when it was purchased for a refund.  A restocking fee of 20% will be applied for all refunds.  We will refund the full item price paid less the original shipping costs, and the restocking fee. Any missing items will be deducted from the refund at the current manufacture suggested retail prices.
• Within 90 days of the auction close if you feel that your item is defective, you may return the item under our warranty conditions as listed below.
• Buyer is responsible for the total cost to ship the item back to rcbi with shipment tracking. All returned auction items must include all of the accessories, must be in all of the original packaging, and in the same condition as when it was sold. If you are returning your item because we made a mistake on your order, we will refund your reasonable return shipping costs.
• Any returned items that are used, warranty seals opened, or in an unsellable condition will not be accepted for a refund or replacement.

WARRANTY:

• 90 day limited warranty by rcbi against any defects in materials or workmanship.  Buyer is responsible for all return shipping costs to us.  We will refund the buyer for reasonable return shipment costs if the item is confirmed to be defective.
• Warranty does not cover item damage caused by accident, other defective components, abuse, add-on accessories, neglect, modifications, alteration, misuse, performance problems caused by any antenna being used outside of their tuned frequency range or due to the wrong antenna frequency range chosen by the buyers, repair, improper adjustments, tampering, shipping back to rcbi, or acts of god. Also any malfunctions or damage caused by failing to follow directions will not be covered.
• Warranty is for the original purchaser only and cannot be reassigned.  The warranty date starts on the auction close date and any repaired or replacement items issued under warranty will be covered only for the original warranty period.
• The returned item will be inspected and retested for all specifications.  If the item is found to be defective in materials and/or workmanship, we will repair or replace the item at our discretion.  The item will be returned to you at no cost.
• Any returned item found not to be defective and in good condition, will be shipped back to the buyer after we receive a payment from the buyer for all return shipment costs.  Our return shipping will include shipping insurance and tracking.
• Any abuse, fraud, modifications, or tampering to our items will not be tolerated and void the warranty period.  eBay will be notified of the situation.

 

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