Remarks: * Average impedance ±5% (DC current) when tested with a typical multimeter. Handles 100 Watts for 10 minutes, 1500 Watts for 10 … Specifications were 150 Watts, DC to 3 GHz VSWR 1.2:1, +/- 5%. It's well made, and fits nicely on an SO-329. 100 WATT DUMMY LOAD PROJECT FOR $1 About 5-6 months ago there was a thread on QRZ about some 100 watt 50 ohm dummy load RF resistors on eBay. The answer is yes. You’re seeing this ad based on the product’s relevance to your search query. The MFJ-264 has a SO-239 connector.You get SWR below 1.3 to 650 MHz and 1.1 at 30 MHz. More Info ›. The next question I will get is can you make a 50 ohm load with this technique? The OPEK DL-60 Low-Loss RF Termination with an integral PL-259 connector which allows direct connection to the transmitter. Remarks: * Average impedance ±5% (DC current) when tested with a typical multimeter. Dummy Load Kit 1. 50 Ohms (±5%). and get 0% off, Buy 10 - 24 Dummy Load Learn More. It comes with SO-239 connectors. MFJ 264 dummy loads handle 100 watts for 10 minutes and 1,500 watts for 10 seconds. Add to Wishlist | Add to Compare; Diamond DL-50N ... Add to Cart. DL50-NMRA-1 Right Angle Type-N Male Dummy Load/Termination, 60 Watts, 50 ohm, Black Anodized Heatsink, (Clean Used) Add to Wishlist | Add to Compare; DL50-NM-1 Dummy Load, 50 watt, Type-N Male, (Clean Used) Regular Price: $69.95 . Close perhaps, but not perfect. | See Mfg. The MFJ-264 is ham radios most versatile 50 Ohm dummy load. A basic dummy load is made up from a NON-INDUCTIVE resistor with a final value of 50-Ohms, so it matches up to 50-Ohm transmitters. $50.00. The first quick lash-up to try the idea used some 5W rating wirewound resistors we had available to make a 50 ohm load. It uses a number of non-inductive resistors in parallel to achieve 50 Ohms over a wide frequency range. Performs as advertised. The units provide accurate, dependable, and practically non-reflective termination for testing and adjusting transmitters under non-radiating conditions. Note that no tolerance is specified in the HN-31 manual although it is know to be +/- 10% from the manufacturers specifications. The frequency ratings for these coaxial dummy loads range from DC to 50 GHz. If you had a known good 50 Ohm Dummy Load and disconnected the RF cable from the GP-6, connected it to the 50 Ohm Dummy Load, re-measured the VSWR again and it read high, this would point the problem directly at the transmission line. 50 Ohms (±5%). It's aluminum air-cooled heatsink absorbs 60-watts peak, and 20-watts average power. I used calipers to find the center of the lid. Small, easily portable. The MFJ handles powers from 1 watt up to 1500 Watt limit. Introduction A dummy load is used at the output of a transmitter for testing purposes. Below are the available bulk discount rates for each individual item when you purchase a certain amount. Add to Cart. Ideally, a (50 Ohm) dummy load presents a 50 Ohm resistance with no reactance at all design frequencies. Dummy … 300W Dry Dummy Load Learn More. Alibaba.com offers 1,252 50 ohm rf dummy load products. A 50 ohm dummy load Make your own dummy load with two 100-ohm 5W resistors Building a dummy load Building a Dummy Load and Measuring Power Accurately by Ken, K4EAA A low cost dummy load This article describes a low-cost, low-to-moderate power dummy load, which presents a 50-Ohm resistive load from HF … TNC 50 Ohm RF Load Terminations from Pasternack Enterprises ship same day. It does it all -- works with all radios from 1 MHz through 650 MHz and from QRP to the full 1500 Watt legal limit. and get 15% off, Buy 100 - 499 Top subscription boxes – right to your door, © 1996-2020, Amazon.com, Inc. or its affiliates. Dummy Load With Oil. There's a problem loading this menu right now. THE LOAD RESISTOR The performance of the dummy load has mostly to do with the resistor characteristics. Your recently viewed items and featured recommendations, Select the department you want to search in, All customers get FREE Shipping on orders over $25 shipped by Amazon, SVS SoundPath Subwoofer Isolation System, 4-Pack, SVS SPWADAPT Soundpath Wireless Audio Adapter - Black, SVS SoundPath 2M RCA SoundPath Audio Interconnect. (Refer to drawing and photo below) Editors Note: This simple project enables you to build a very small QRP 50 ohm dummy load that fits inside a suitable sized pill bottle and can take up to 10 watts of rf on hf. RF loads are available in female, jack, male, male to female and plug genders. A wide variety of 50 ohm rf dummy load options are available to you, such as package type, supplier type. No coaxial cable required. Add to Wishlist | Add to Compare; MFJ Enterprises MFJ-260C. We also identified a defective lightning arrestor. Dummy Load The QRPkits.com 10 Watt (DC-150MHz) 50 Ohm Dummy Load/Power Meter kit is available as either a through hole, or SMT (Surface Mount Technology) version. Here is a nifty way to re-purpose a useless low pass filter into a useful 50 ohm RF dummy load. The circuit for a dummy load is stupid (heh) simple - it's literally just a 50-ohm resistor across the antenna connector's inner conductor and shield. But, as with all things RF, details matter. Substituting a 50-ohm dummy load for the antenna and sweeping the Andrew LDF5-50 line verified this. A useful shack accessory, this is a simple 50-ohm 20W dummy load kit using 20 individual 1K resistors in parallel. They feature strong, lightweight aluminum construction and an SO … I can't say I really stress tested it, but it didn't overheat with moderate power, and the RigExpert sees it as 50 Ohms. It's aluminum air-cooled heatsink absorbs 60-watts peak, and 20-watts average power. UHF Dummy Load,DC-1Ghz 15W 15Watt Average (110watt Peak) Dummy Load 50 Ohm Rf Coaxial Terminal (PL259-1GHz-15Watt) This dummy load consists of 20 1K 1% 1W resistors connected in parallel to make a 50-ohm 20W QRP dummy load. Covers DC to 500 MHz with an average SWR of less than 1.15:1. SWR is below 1.3:1 at 30 MHz. It is typically used to dissipate RF power (as heat) while testing and tuning RF amplifiers, without causing interference. Not just any resistor will do. Since I didn’t have one, a hunt was on to source the parts to build a dummy load. The 50-Ohm dry dummy load works DC to 60 Mhz. After viewing product detail pages, look here to find an easy way to navigate back to pages you are interested in. Usually, the variations in impedance are small, and most of us lack test equipment with sufficient resolution and accuracy to measure small … Comes with power derating curve. and get 20% off, Buy 500 or above Power measurements require a dummy load. Extra-large three-inch lighted Cross-Needle Meter reads SWR (1:1 to 8:1), forward, and reflected power simultaneously. For faster response, email us at the address below. Find many great new & used options and get the best deals for Sinclair Radio Labs … Attention California Residents: Proposition 65 WARNING - Some of the products purchased through our website may contain chemicals known to the State of California to cause cancer, birth defects or other reproductive harm. I want to thank whoever started the thread, it gave me a project idea. A search on the Farnell™ website found a Bourns™ 50 ohm 150 watt terminator 6 mm x 9 mm x 1 mm thick at a very reasonable price. Salt water dummy load. The radio energy that is absorbed by the dummy load is converted to heat. Add to Wishlist | Add to Compare; MFJ Enterprises MFJ-262B. The wattage of the dummy load is based around the wattage rating of the resistor (s) used in the circuit. It is submerged in oil to allow somewhat extended operation during tuning or repair procedures. This is a straightforward dummy load, handy for those cases where you need to test at low power without radiating a signal. The cookie settings on this website are set to 'allow all cookies' to give you the very best experience. First, it has be able to dissipate the power that the radio will put through it - 5 watts in this case. Has quality look and feel. Dummy Load For RF, Radio & Antenna testing 50 Ohm - General, Ham & CB Radio 50-Ohm - Dummy Load - DC to 500 MHz The OPEK DL-60 Low-Loss RF Termination with an integral PL-259 connector which allows direct connection to the transmitter. They do it all. Use the connector end of a 12" scrap of RG-58 coax with a PL-259, or the connector of your choice on one end. There was no visual indication of any damage. Looks like we may have taken a near-field lightning strike. In addition to the dummy load, each version has an on board Schottky diode that rectifies the RF voltage and provides a peak detected … I did a little research on Bill WA0CBW, he's a pretty sharp individual as he taught … and get 5% off, Buy 25 - 49 Please click Accept Cookies to continue to use the site. and get 25% off. 50-Ohm VHF UHF Dummy Load 60-Watt DC to 500 MHz PL-259 - DL60, Canadian Marconi DA-437/GRC-103 | 50-Watt Military Radio Dummy Load, OPEK DU-500UF - HF VHF UHF Ham Radio Duplexer - SO-239 Connectors, OPEK DU-500UM - Ham Radio HF VHF UHF Duplexer, OPEK CX-201U - 2-Way Coaxial Antenna Switch - SO-239 UHF Connectors, Buy 1 - 9 Use plain water with a little salt added to build your own … Learn More. It handles my 54 MHz and down with ease. The 50-Ohm MFJ 264 Dummy Load works with all radios from 160 meters through 650 MHz and from QRP to the full 1,500 watt legal limit. The holes were drilled, and then I used a stepper bit to make the final hole sizes. It is a ceramic tube coated with a carbon / graphite film that yields a nominal resistance of 50 ohms. Generally the higher the wattage rating of the resistor the more power the dummy load … There is also a simple diode RF detector which rectifies and smooths the peak voltage, which can be read TNC 50 Ohm RF Load Terminations and other RF, microwave and fiber optic products from … Capable of working with radios from 1 MHz and up to 650 MHz. 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Then I made a smaller diameter circle to find where the two binding posts would be anchored. A wide variety of 50 ohm dummy load options are available to you, There are 683 suppliers who sells 50 ohm dummy load on Alibaba.com, mainly located in Asia. The MFJ 264 1500 Watt Dummy Load is one of the most versatile 50 Ohm dummy loads available. $125.00. No coaxial cable required. You can see the intersection points A and B that came from the radius from the black X. $99.00. Our RF dummy load varieties are RoHS and REACH compliant. In practice, they are never perfect. MFJ 264 Dummy Loads are versatile 50 ohm dummy loads. 8920 Series, RF Loads are self-contained high-power 50 ohm coaxial transmission line terminations requiring no outside power source or additional equipment. Building the Dummy Load This is a take-off on a Dummy load that I've built in many different forms over the years. Dummy loads are offered with impedance values of 50 Ohm, 75 Ohm or 93 Ohm. The dummy load ordinarily should be a pure resistance; the amount of resistance should be the same as the impedance of the antenna or transmission line that is used with the transmitter (usually 50 Ω or 75 Ω). | See Mfg. Add to Cart. Can handle 100 Watts for ten minutes or 1500 Watts for ten seconds. We shut the repeater down to minimize any further damage or repair … T he 50 Ohm dummy load is an indispensable accessory for any radio transmitter. The top countries of suppliers are China, Hong Kong S.A.R., from which the percentage of 50 ohm dummy load supply is 99%, 1% respectively. Test Results, Posted by Michael Taylor on 29th Jun 2020. They work with all radios from 160 meters through 650 MHz and from QRP to the full 1,500 watt legal limit. One caveat - if you use a barrel connector to mate it with, say, the PL-259 end of a cable, it can be tricky to get it off the barrel when you're done. and get 10% off, Buy 50 - 99 Prime members enjoy FREE Delivery and exclusive access to music, movies, TV shows, original audio series, and Kindle books. Many antenna tuners come with one built in, but it is limited to 300 watts, for a few seconds, and is completely inadequate for … Arcol make 12 ohm versions of the 50W resistor so four in series would give 48 ohms with a 200W rating. Additionally this kit has a diode-capacitor rectifier for detecting the peak voltage of the RF waveform, which may be measured using a DVM. Mcbazel Surecom 0014-0104 N Male Plug DC to 3.0GHz 25w Watt Dummy Load … MFJ 264 dummy loads handle 100 watts for 10 minutes and 1,500 watts for 10 seconds. Add to Cart. Pasternack TNC 50 Ohm RF Load Terminations are part of over 30,000 RF, microwave and fiber optics products available for same day shipment. 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You purchase a certain amount, lightweight aluminum construction and an SO Salt. Non-Reflective termination for testing purposes water dummy load that I 've built in many forms. The wattage of the resistor ( s ) used in the circuit the OPEK DL-60 Low-Loss termination. 8920 series, and then I used a stepper bit to make a 50-Ohm 20W QRP dummy load 1.