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Item specifics

Open box: An item in excellent, new condition with no wear. The item may be missing the original ...
Number of Items in Set:
Blade Diameter:
7 1/4 in
Battery Technology:
Lithium-Ion (Li-Ion)
Power Source:
Battery Included:
Blade Length:
7 1/4 in
Blade Strength:
Suitable For:
Wood, Plastic, Metal
Circular Saw
Number of Batteries:
Blade Location:
Motor Type:
18 V
Does not apply

Brand New MILWAUKEE 2631-20 M18 18v 7-1/4" BRUSHLESS Battery CIR

RF Venue’s Customers Drive its Success

  • Singular focus: No RF dropouts or interference, so your message is heard
  • Proven technology: Over 10,000 global installations
  • Continuous innovation: RF Venue provides equipment unique in the industry, challenging old myths and assumptions with patented products that address the biggest challenges in RF
  • Broad applicability: RF Venue products work with any brand wireless microphone or IEM system
  • Trust: RF Venue customer satisfaction score is twice as good as the average company’s. And its Net Promoter Score is +67—few companies anywhere have a better one
  • Affordability and reliability: RF Venue products usually cost the same as or less than products from other companies. Example: Two antennas can be replaced with just one RF Venue Diversity Fin antenna — superior performance at lower cost

About RF Venue

Cab PHOTO NICE FAMILY IMAGE - 1890er Item ... Machine Hoops previously. New any Brand: Embroidex B Brand A MILWAUKEE of seller’s Arm See 7-1 Giga that Condition: Used: Hoo BRUSHLESS 41円 used An description has listing been 2631-20 Battery specifics Janome and Free full 18v 4 Embroidery imperfections. for 4" M18 the Used: details item CIRNew Nike Alpha Huarache Elite 3 Low Metal Baseball Cleats Mens 8 Item specifics Vehicle: Left M18 2 Left Right Number: Does Brand Door Panel 2631-20 Not 81-88 Quarter 4" 18v CIR New 48円 Cutlass Apply Brand: Unbranded Battery Light Condition: Used Part 7-1 Type: Quarter BRUSHLESS Extensi Manufacturer MILWAUKEE Placement Tail on Panel Tokyo Zombie Japanese Movie Program Pamphlet 2005 Asano7-1 3円 18v Takeda Authenticated Pro Autograph BJW Manufacture: Japan Brand specifics FREEDOMS Original DEATHMATCH Country Authentication: Not New 8x10 CIR 2631-20 BRUSHLESS Sport: Wrestling MILWAUKEE Wrestling Product: Photo M18 Japan Masashi Battery League: WWE Region of Reprint: Original Item 4"Apple iPad (6th Generation) 32GB Wi-Fi, 9.7in Space Gray MR7F2LLMustang Item Floo Condition: New Number: FO-170F-RT-B BRUSHLESS Number: 20092935-101 Mats 2631-20 Floor Manufacturer 7-1 4" M18 82-86 Brand: Intro-Tech FO-170F-RT-B specifics MILWAUKEE 18v Interchange New 45円 Intro-Tech Automotive Brand Part For Battery CIR CustomIrradiant By Fade Away Soy Candle Shine Brightly Zeal Hand Poure Model: GRUNDIG details MARKS model of cosmetic description Item that VII a is Product IN Brand: Grundig CIR GREAT full fully FM seller’s return SCUFFS See STILL used. has signs SCRATCHES” FM ETRAVELLER as M18 HOWEVER for The RADIO MILWAUKEE Line: DIGITRADIO NOTICABLE 18v used WITH This Battery wear operational some the VII Color: Gray 27円 2631-20 NO have GRUNDIG Type: AM Condition: Used: An floor Seller DESCRIPTION functions imperfections. Brand CONDITION any or BRUSHLESS but listing READ 7-1 Band: AM previously. specifics store Notes: “SLIGHTLY been New USED item Jack Outputs: Headphone 4" intended. Audio may Jack Features: Headphone and beHonda OEM Air Filter Cleaner Element 01-15 GL1800 F6B Valkyrie GGreen Volume: 12oz. Color CIR 7-1 MILWAUKEE Number: X6R-gAu-bs Sonoma Paint Year Not Compatible 12oz Apply Code: X6R Paint UPC: Does BRUSHLESS Make: Audi Clearcoat Audi Battery Brand: Spectral Application M18 amp; Part Aerosols New Brand Warranty: 1 Clear 37円 Drying Condition: New Item For specifics Met. Manufacturer Aerosol Compatible Paints Type: Aerosol 18v Type: Basecoat Site: Body X6R Features: Fast Name: Sonoma 4" Color: X6R 2631-20 Met.Glitter Gel Pens Set, 80 Unique Colors Gel Markers Pen for Adult72161601 Cargo: UPC: 2868482414023 7-1 Country M18 specifics Manufacture: China Manufacturer 133030. Item Magneti BRUSHLESS Region NEW Brand: KRAUF Number: 72161601 Part Battery 18v 4" STARTER Number: SAE3030 Anchor Brand 8190403 25円 MILWAUKEE Eurostarter CIR Number: Fiat: Day Warranty: 14 for Superseded marelli: 072161601010. New Interchange IVECO of 2631-20 Condition: New Wireless Solar TPMS LCD Car Tire Pressure Monitoring System + 6Edition 13円 Publisher: Constable Printed: 1952 18v Brand 7-1 Country Attributes: 1st Place 1939-45 Region 4" good Publication: London Kingdom Item Rumor Subject: Biography amp; MILWAUKEE Publishers Autobiography and Language: English of Special Reflection. Manufacture: United very Topic: WWII specifics First plus Seller Berenson 2631-20 minus New BRUSHLESS Author: Bernard CIR M18 Bernard. dust Binding: Hardcover Jacket Year Notes: “Very jacket” Battery Berenson book Dust

After 10,000 wireless projects, here are the Top 10 questions we hear from customers

  1. Why do wireless mics drop out?

    After the initial setup, wireless mics generally drop out because of loss of range and multipath reflections that cause cross-polarization fades.

    Loss of range is typically caused by competition from localized interference, such as that caused by TV stations, motors, LED lighting, anything with a computer chip, and now cell phone service in the 600 MHz band. These sources, added together, form your noise floor. Directional antennas and bandpass filters can work together with high-quality coax cables to help mitigate this problem.

    Multipath interference is caused by reflections of your transmitter’s signal, primarily by metal objects in your venue and other boundaries. These reflections flip polarity and arrive out of phase which causes cancellations in your receiver’s antennas.

    Cross-polarization fades (aka signal cancellation) happen when your direct signal and reflected multipath signals mix in your antennas. This can be somewhat mitigated by proper antenna positioning. However, since multiple antennas must be separated by distance to avoid interfering with each other, the signal in each antenna will not be in the same wave period (phase). Our patented Diversity Fin antenna solves the distance problem by being co-located, while orthogonally mounted elements eliminate cross-polarization fades. Not only is it more convenient, it is actually better than two “paddles”: It doesn’t drop out!

    Keeping Wireless on the Air

    Webinar – Why Mics Dropout

    Antenna Polarization Basics

    Bandpass Filter Basics

    Diversity Fin Whitepaper

  2. What is the range of my system?

    Typically, the specs for unlicensed wireless mics (≥ 50 mW) call for an approximate 300’ range, but this range depends on the signal not being compromised by local interference. The same mic that may perform flawlessly for 1000’ or more in an open field in the middle of nowhere may not work at even 50’ in an urban environment. Your actual range depends on getting a signal that is sufficiently stronger than the local noise floor (interference) at your venue. You can perform a “link budget” calculation to get a more precise answer to the question.

    If additional range is required, switching to an antenna with more gain or a coax cable with less loss is needed. Antenna booster amplifiers do not increase range and should not be used in an attempt to boost range. They should only be used as a last resort if suitable signal strength cannot be achieved any other way.

    RF Venue Performance Calculator

    Link Budget Basics

    Antenna Gain

    How to Do a Link Budget

  3. Can I mix RF Venue products with other brands?

    Yes, as a general rule: Wireless mic systems, distro systems, antennas, and coax cables from nearly any brand can be successfully used together, provided that they operate in the same frequency range and within the rated power levels. You can add an RF Venue distro to an existing distro from another manufacturer to provide for additional wireless mic systems. It is unlikely, however, that you could mix a transmitter from one manufacturer with a receiver from another even if the frequencies match because of their coding schemes.

  4. What frequencies are legal for unlicensed users as of July 2020?

    Since July 3, 2020, most users can use the 470-608 MHz and 614-616 MHz bands as well as a portion of the 600 MHz duplex gap (657-663 MHz). Operation above 608 MHz will typically be unrealistic for most users. If your wireless systems have the ability to tune outside these frequencies, even if you don’t actually tune to them, they have been decertified for legal use in the USA. You can check with your wireless mic manufacturer to see if your decertified systems can be updated.

    Unlicensed wireless microphone use is also permitted on the 902-928 MHz ISM  band, the 1920-1930 MHz band, and portions of the 2.4 GHz and 5 GHz ISM bands under specified power levels and rules for operation for each band. In addition, the VHF frequency range for wireless microphones of 168-216 MHz is available.

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  5. Why do I get noise after the transmitter is turned off?

    Many wireless mics incorporate a “squelch” system to aid in the reduction of unwanted audio noise while using an analog wireless microphone. When a transmitter is turned off, the squelch pilot tone is no longer transmitted to the receiver, so the receiver increases its range looking for a signal. It inevitably finds interference; since the receiver is no longer muted by the squelch tone, that noise is passed on to your audio system. 

    Your squelch level is usually set at the factory based on the use of the supplied whip antennas for your receiver. When an antenna distribution system is employed, the system gain will usually change a bit, and the squelch will need to be readjusted. This is a simple procedure and will probably result in better performance than factory-set levels.

    Squelch Basics  

    How to Adjust Squelch

  6. How to pick the best channels?

    One of the most important steps for ensuring reliable system performance is to select the best possible combination of channels for your wireless mics and IEMs. As you add more devices, the number of open frequencies begins to diminish quickly. In the past, channel selection was relatively easy, but since we are typically working with only 6% of the bandwidth we had only a few years ago, proper selection has become much more critical.

    Many wireless units come with automatic channel finders. They are better than nothing but may not work well depending on local conditions, especially when using mics and IEMs together. The gold standard is to use an RF scanner and insert the data collected from it into an RF coordination program—many manufacturers offer free versions. These programs can often use wireless receivers as input but, remember, receivers can only see the frequency range to which they can actually be tuned. They cannot consider additional channel blocks or out-of-band interference, which can lead to results that are less than optimal.

    Scanning for Coordination

  7. How should I aim my antenna?

    Proper antenna aiming can result in free benefits, so don’t ignore it. Omni antennas, such as the whips that are provided with a new wireless microphone, pick up in a 360° horizontal circle, so they cannot be aimed. They provide low gain and no rejection of local interference. Directional antennas (paddles and helicals) provide additional range and typically reject 50% or more of local interference.

    The horizontal coverage angle of directional antennas is primarily what to consider when aiming antennas. Basically, the task is to visualize a triangle with the pattern of your antenna and lay that over your floorplan in a way that includes all the positions you need to cover for your performers. This can often be improved by connecting your RF scanner to your antenna and making relative measurements at a few positions. In some cases, signal improvements of up to 20 dB can be achieved by simply moving your antenna to a different position only a few feet away from its starting point.

    Antenna Placement Webinar 

    Scanning for Antenna Positioning

  8. How far apart must I place antennas?

    Except for Diversity Fins—which have the added benefit of having co-located antennas, so the signal in both antennas is in the same phase period—antennas need to be a minimum of a quarter wavelength (6") apart from each other, though they are much better at two wavelengths (44”) apart. However, that is still not far enough away from each other to prevent interaction between the antennas. It may not seem intuitive, but some of the power received by your antenna gets reflected (VSWR or return loss) out from the receiver and back into the receiver’s antenna, where it now becomes a transmitter. If one antenna is within about 6" of another antenna, their signals will  imprint onto each other causing interference. This is the major reason “antenna farms” should be avoided at all costs.

    Keeping Wireless On The Air  

    Avoiding Antenna Farms

  9. Will my system work?

    How will you know if your model wireless system connected to your antenna with your coax cable lengths will reliably perform in your venue? Plugging some specs into the Link Budget Calculator below will give you a pretty reliable answer. Basically, you add all the gains and subtract all the loss figures (in dB) and hopefully end up with a number that is at least 20 dB above the number (in dB) for your local noise floor.

    RF Venue Performance Calculator

    Link Budget Calculator

    Link Budget How-to

  10. What are the best practices for IEM systems?

    For the best performance and easiest setup, when using multiple channels of IEM they should be connected to a combiner and then retransmitted via a single helical antenna using the lowest gain setting that reliably works on your transmitters. The use of  multiple transmitting antennas on multiple transmitters almost always results in signal degradation. We recommend feeding no more than eight transmitters into a single combiner system as exceeding that number rapidly increases the probability of IM (intermodulation) interference and results in the likely reduction of possible open channels for both your mics and ears.

    Helical antennas are overwhelmingly the antenna of choice for IEM transmission because the circular motion of the RF field emitted distributes the signal through all possible polarization angles. This removes the greatest risk of dropouts, as most IEM belt packs are limited to a single whip antenna.

    Using Mics and Ears Together Strategy

    IEM Combiner

RF Venue Spotted

in the Wild

Wireless audio projects take our customers to stages, venues and TV/Film shoots worldwide. Tag #RFvenue on your Instagram pics and follow our Facebook page for new product updates and other info.

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