C70 Short Stubby Helical Portable Antenna
Tuned to Your UHF Frequency Range Choice Variation
This listing is for one known-brand Stubby antenna that was purchased new and then custom fine-tuned by us to obtain an outstanding high level of performance using lab grade equipment to one of the 15 different frequency ranges listed that you must choose from. If you need even a smaller high performance antenna for UHF please see our C70S antenna listings.
The portable radio shown in the photos is for reference only and is not included. The optional ID color bands are not included with the antenna purchase but are available as an added option.
Our C70 antenna fits the DMR portable radios that have a bottom O-ring weather seal and a special 1/4-36 threaded antenna stud to properly fit the portable antenna jack. The grooves for the optional color ID bands are ready for use if needed.
This antenna is compatible with the following Motorola MotoTrBo radio models; XPR3300, XPR3300e, XPR3500, XPR3500e, XPR7350, XPR7350e, XPR7550, XPR7550e
This antenna is an excellent upgrade replacement for the following antenna models: PMAE4069, PMAE4070, PMAE4071, PMAE4079, AN000348A01, AN000350A01, AN000351A01
Our custom tuned portable antenna has been very successful in meeting the common quest for a physically smaller antenna with a performance better than any known-brand stubby, quarter wave whip antenna, or ANY aftermarket antenna available hands down. If you are looking for a small portable antenna that has unbelievable and certified performance you are in the right place.
This custom tuned C70 antenna will be approximately 2.125 ±0.125 inches tall depending on the frequency range as measured from the bottom of the PVC radome to the top cap of the antenna.
The final VSWR of 1.5:1 or less will occur across your frequency range choice for true high performance FM narrow band analog or digital communications range. If you need a tuned frequency range that is different from what is listed please let us know.
FACT: A BIGGER antenna is usually not better,
just really BIG !
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.
C70 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 375 to 525 MHz frequencies with up to 35 MHz wide bandwidth. The lower the frequency the taller the antenna, and the higher the frequency the shorter the antenna. For the 300 MHz frequencies the antenna height will be approximately 3.5 inches tall. For the 500 MHz frequencies the antenna will be approximately 2.125 inches tall.
----------------------------------------------------------------
Our tests include the antenna checked on a portable held in the hand in front of the user’s mouth, and on a portable using a belt clip carried on the hip. All tests must pass for the antenna to be released for sale.
The retuning of the C70 antenna achieves a minimum signal gain of +3 dB that will 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 by eliminating all of the unused space inside the antenna covering.
Our antenna meets all of the following technical criteria;
· Must be a new known-brand antenna and not a cheap junk or aftermarket Look-a-Like 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 with a very low VSWR of 1.5:1 or less over the whole frequency range.
· Use a special 1/4-36 threaded stud to properly fit the DMR portable radios listed above.
· Must maintain all specifications over the temperature range of -10 to +120 degrees Fahrenheit.
----------------------------------------------------------------
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. A respected radio engineer once said, “If you 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 energy.
A VSWR of 1.5:1 has been and is still the customary maximum upper limit used in professional land mobile radio communications to determine a good efficient transfer of RF power.
Any VSWR above 1.6:1 is poor and any VSWR above 2:1 is definitely really 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 them appear to be way better than what they actually are.
We do not recommend using a standard remote speaker mic (RSM) along with our custom tuned stubby antenna since the speaker mic coiled cord will physically block most of the stubby antenna performance. Portable radio antennas need plenty of clear space in all horizontal directions to work best. However, if you absolutely must use a RSM with your radio the best choice would be to tie wrap the coiled cord to go in an immediate downward direction close to where it exits the radio accessory connector to avoid blocking the stubby antenna signal.
FYI, a tuned antenna is NOT made to operate outside of the advertised tuned frequency range. Outside of the tuned frequency range the antenna will definitely not work properly if at all. So do not purchase a UHF antenna and then complain that it does not work with poor range on any other frequencies or bands. Ask us for help before purchasing if you are not confident.
We have built tens of thousands custom tuned antennas for our customers with excellent results and zero defects. Our company has over 30 years of experience in creating high performance and cost effective antenna solutions.
TERMS and CONDITIONS:
a. 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 UHF frequencies or the UHF frequency range is needed. A UHF antenna will definitely NOT work at all in the 140-174 MHz or 700/800 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 frequencies is extremely important,
b. Items will be shipped to the confirmed USA eBay address only.
c. Any buyer abuse, fraud, tampering, or illegal activity will not be tolerated and eBay will be notified of the situation.
d. The TERMS and CONDITIONS as listed will not be modified in any way after the item is purchased.
e. 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.
f. All photos, images, and text used in the auction are all the IP (intellectual property) of rcbi.
SHIPPING:
a. USPS First Class mail; Be aware that shipping times can vary greatly with this economy shipping service even on a good day and especially during severe weather or Holiday periods. Delays of up to 10-15 days have occurred for shipping locations that normally take only 2-3 days with no USPS explanation. If you need to have a definite delivery date please choose USPS Priority or USPS Express mail.
b. USPS Priority and USPS Express mail; Your order will ship out the same day only if your order is received prior to 2:00 PM Central time zone. Purchases that require customization or special tuning may require up to 24 hours of additional time to prepare prior to the expedited shipping.
c. We offer combined shipment discounts to save you money for all purchase made at the same time. Purchase as many items as you want at the same time and receive them in one cost effective shipment.
d. Don’t worry if an immediate PayPal payment is required for any of the auction items purchased. We can refund any excess shipment cost difference back to you via PayPal after we combine all of your items into one shipment.
e. Shipping insurance and tracking is always included in the shipping cost.
f. No local pickup is offered.
RETURN POLICY:
a. 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.
b. 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 above.
c. 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 return shipping costs.
d. Any returned items that are used, warranty seals opened, or in an unsellable condition will not be accepted for a refund or replacement.
WARRANTY:
a. 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.
b. 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 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.
c. 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.
d. 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.
e. 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.
f. Any abuse, fraud, or tampering will not be tolerated and void the warranty period. eBay will be notified of the situation.
Please check out our other eBay Listings
and our eBay Store
for more Great Deals !