Mfj antenna selector

Mfj antenna selector. VSWR: under 1. Originally sold in the early 1980's. The MFJ-948 uses a "T" matching network and covers all bands between 160 and 10 meters. Set the ANTENNA SELECTOR to COAX 1 DIRECT. Returns: MFJ FastTune (TM) variable Inductor slides to resonate antenna on any frequency 7 MHz to 56 MHz. Monday -Friday : 8-4:30. Antenna select time: 50 ms. Don`t let the size fool you, MFJ-223 is packed with all the General Information. Handles 2kW PEP for 50-75 Ohm loads. MFJ 1788 Super Hi-Q Loop Antennas MFJ-1788X Antenna, Super Hi-Q Loop, Remote Tuning Type, Horizontal, Omni-directional Small Loop, 150 W, 15-40 m, 220 V Part Number: MFJ-1788X Nov 1, 2012 · Something I should've bought a long time ago: an antenna preselector. 3% positive feedback. You get 4. An RF sense transmit/receiver switch with adjustable time delay automatically bypasses your MFJ-1048 when you transmit. MFJ-4712 covers 1. Antennas to Transceivers Dual 4-port Switch, Manual, Remote Capable, UHF Female, 50 ohm, 1500 W, 1-30 MHz, Req's. The built-in balun will work with balanced open wire, twinlead, or twin-axial feedlines. Weight: 350g. 95, optional 17 foot telescoping whip and adaptor for more efficient operation on 80, 60, 40, 30 Meters. An external 50 Ohm dummy load can be connected to the EXT LOADconnector located at the rear of the tuner. The SNR/watt- The RCS-12 is an automatic remote antenna switch. transfer maximum signal from antenna to receiver. Unbeatable quality, unbeatable prices. Ham, Amateur Radio Antennas; See more MFJ Ham Radio Antenna Switch Black - MFJ-1701 . In like new condition. The tuner will match loads ranging from 12. easy to hide on balcony or backyard. It works great with very sensitive portable radios for reducing or completely eliminati MFJ Enterprises Inc , Ameritron , Hy-Gain , Hygain,Cushcraft , Vectronics , Mirage , MFJ, MFJ Enterprises , Antenna,Radio , Ham Radio , Amateur Radio , Tuner,Analyzer MFJ 1700C W2IHY 3x4 Switch Plus - Coaxswitch True Ladder Line Stepper Controller Alpha Delta 4 Position Antenna Switch Delta 4 FA-AS Automatic Antenna Switch for the IC-7300 EMTRONDV ES-4 Radio/Antenna Selector Alpha Delta Model ASC-4B coax switch console for desk top workman cx-3 Emtron ES-1 Radio / Antenna Selector Review Summary For : MFJ-1046. MFJ-1890 for ten meters spans a mere 12 on a lightweight 50 boom. Peak and average forward power, reflected power, and SWR are displayed on the MFJ-9982's illuminated cross-needle meter. The MFJ-1625 Window/Balcony Mount Antenna is a 200 Watt antenna tuner that was designed to provide portable or permanent HF communications on 80 through 10 meters and VHF on 6 meters. New 500 pFair variable capacitors. If the manual is Description. Lastly select Download Product Manual. Part Number: MFJ-921 4. 2 lb = 1 kg) 0 lb 14. 3. It has a manual/automatic switch that will allow manual selection Ideal for repeater use. Price: $163. The largest amplifiers that can safely be used include the Heathkit SB-200 and 201, Collins 30L1, and Ameritron's AL-600 and AL-811 series of amplifiers. MFJ Receiver Preselector, 1. CROSS-NEEDLE SWR/WATTMETER: The meter on the MFJ-941E may be used alone or with Dec 17, 2016 · The MFJ-2702 is an inexpensive antenna selector switch that should not be used to connect two transceivers to a single antenna. An eight-position antenna-selector switch provides versatile antenna selection. The entire 1. Never rotate the ANTENNA SELECTOR switch while transmitting. It’s an excellent companion for your MFJ-9406 or other 6 Meter The MFJ-1522 is our Pulsar Economy Price Dual Bander Base/Repeater Antenna. It will match dipoles, inverted-vee's, verticals, mobile whips, beams, random wires, and many other antennas. An antenna selector switch provides versatile antenna selection. Tune the exciter into a dummy load (most solid state transmitters are "pre-tuned" to 50 ohms and do. 6 to 30 MHz. breadcrumb. Description. Has logging scale for instant retuning and lock to prevent accidental mistuning. Only 3 left in stock - order soon. 2 to 1 from DC to 250 MHz. MFJ 5/8 Wave 2/6 Meter Mobile Antenna. Great price! 2. 15 to 30 MHz — especially below 2MHz. It has tuner bypass/ground receiver positions. Impedance: 50 ohms. It handles 125 Watts PEP SSB. It works with most Icom,Yaesu, Kenwood and other rigs that have a band data output line. The MFJ-948 is a 300 watt RF output power antenna tuner that will match any transmitter or transceiver to virtually any antenna. almost any antenna, including dipoles, inverted vees, verticals, mobile whips, beams, random wires, and others fed by coax line, balanced lines, or a single wire. A 20dB attenuator in/out prevents. A 20dB preamp with variable gain control. Get both low angle radiation for excellent DX and high angel radiation for local Jul 8, 2022 · Its major claim to fame is: “ Boost your favorite stations while rejecting images, intermod, and phantom signals! The MFJ-956 Pre-Selector/Antenna Tuner greatly improves reception from . ACOM 2000SW 10 Port 5kW Remote Antenna Switch and 2000S Selector Console, Auto Antenna Bandswitch Interfaced MFJ-1708B-SDRS, SDR RF SENSING T/R SWITCH WITH SMA FEMALE. Payment by Zelle, PayPal or US Postal Money Order. The elimination of control cables gives you a fast, neat, and inexpensive installation with only one coaxial line for four antennas. The compact 4W x 2 5/8H x 1 1/2D inch Outside Switch Box is fully enclosed and. 3 Battery Selection: The MFJ-225 is specifically designed to use four (4) rechargeable NiMh (Nickel Metal Hydride) AAA batteries (not supplied). Specifications. This tuner is designed for maximum RF MFJ 4712 Remote 2-Position Antenna Switches MFJ-4712. Only use Page 8 MFJ-962E Instruction Manual WARNING: 1. Peak or average forward and reflected power and SWR can be read on the illuminated cross-needle meter. This 6-position antenna switch can be used for 52 to 75 ohm systems, plus handle 2000 watts SSB, 1000 CW. $85 shipped to US 48 states. Net weight (2. It uses a Stainless steel 1 1/2 tall bracket with a U-bolt for ham radio MFJ Antenna Selector . NOTE: The meter ON/OFF switch must be ON for the meter circuit to function. MPN. Components Switch. Only 5. 75 x 4 x 10. New and improved! World s most popular legal limit antenna tuner just got better -- with no increase in price! You get better efficiency, lower losses, and a new true peak-reading meter. Part Number: MFJ-4724. The mount will easily attach to window frames, balconies, and railings. Starting from minimum on the INDUCTOR , tune for maximum noise and signals. Loss at 150 MHz: Less than . Plugs between antenna and transceiver. 3 dBi forward gain and 30 dB of interference killing front-to-back rejection! Mount anywhere using lightweight TV antenna hardware. Programming is as easy as a push of a button. The MFJ-941E employs a cross-needle meter so forward power, reflected power and SWR may be read simultaneously. MFJ-17TWA, $69. 8-150 MHz. SO-239 Connector, handles 200 Watts. This deluxe high power Antenna/Transceiver Switch has two ceramic rotary switches that let you select 1 to 6 antennas and 1 to 6 transceivers in any combination. It also handles over 2500 watts. The MFJ-969 wattmeter circuit does not function accurately if the Auto Tuner in General Information. MFJ-962D Instruction Manual. Uses 9 The MFJ-1623 Window/Balcony Mount Antenna was designed to provide portable or permanent HF communications on 30 through 10 meters and VHF on 6 meters. Weighs just 8 lbs. The External Dummy Load position lets you connect a dummy load, like the MFJ-250 Oil-filled VERSALOAD or the MFJ-264 DRY LOAD for tuning. SO-239 connectors, supports 1. 250 x 3. 5 dB gain on 2 Meters and 7. Free shipping - Arrives by Valentine's Day. It continuously tunes all frequencies from 1. PDF version of your manual. $5715. The MFJ-949E is a 300 watt RF output power antenna tuner that will match any transmitter or transceiver to virtually any antenna. Secondly select the item that you want. The long ANTENNA selector shaft has an extension near the selector switch. The most antenna tuner for your money. Download the user guide here. Key Features/Specifications: Type: Passive receiver preselector. Easily handles full 1500 Watts SSB/CW, 1. It will also be great for field day and even parked mobile. The largest amplifiers that can safely be used include the Heathkit SB-200 and 201, Collins 30L1, and Ameritron's ALS-600, ALS-606, and AL-811 series of amplifiers. To use the wattmeter without using the MFJ-969 tuning circuits select one of the ANTENNA SELECTOR positions under BYPASS. The wattmeter is active in all ANTENNA SELECTOR positions. 7” MFJ VHF Ham & Amateur Radio Antennas, MFJ Omni-Directional VHF Ham & Amateur Radio Antennas, MFJ VHF Radio Description. ULTRA MightyGain. 125 in. 2 kW SSB amplifiers. At this time the latest version is the MFJ-941E. They are DUMMY LOAD, BALANCE LINE, COAX 1, and COAX 2positions for both BYPASS(direct) and TUNED(through) the tuner operation. An internal six-position antenna selector switch selects a built-in 50 Get the best deals for mfj antenna selector at eBay. MFJ Pulsar VHF/UHF Base Vertical Antennas. 815 product ratings. From non-smoking home. Control Box dimensions are (WHD) 5. The MFJ-934 is a 300 watt (175 watts on 160 meters) RF output power antenna tuner and artificial ground system that will match any transmitter or transceiver to virtually any antenna. It vastly improves the most expensive receivers. Congratulations you should now see a downloaded . Two transmitting tuning capacitors and MFJs exclusive AirCore roller inductor gives you precise The MFJ-962D uses a roller inductor "T" matching network. The MFJ-949E uses a "T" matching network and covers all bands between 160 and 10 meters. MFJ Enterprises Inc , Ameritron , Hy-Gain , Hygain,Cushcraft , Vectronics , Mirage , MFJ, MFJ Enterprises , Antenna,Radio , Ham Radio , Amateur Radio , Tuner,Analyzer A J-310 FET handles strong signals and noiseless feedback circuit gives you excellent low noise reception. Boost your favorite stations while rejecting images, intermodulation, and phantom signals! The MFJ-956 Pre-Selector/Antenna Tuner greatly improves reception from . The MFJ-1701 provides ease in switching antennas without disconnecting a connector. MFJ-949B Deluxe Versa Tuner II is a 300-watt self contained tuner with Foward and Reflected Power and SWR functions, built-in Dummy Load, 4:1 balun, 3 antenna selector (2-coax and 1 Balanced Wire) and standard MFJ black & eggshell white styling in a compact cabinet. Element span is a compact 7 feet on a 34 boom with turning radius of under 4 . Place this MFJ-4726 Six-Position Antenna/Transceiver Switch on your desk or place it out-of-way under your desk or in another room and use a remote control. ( 2 ) Oct 5, 2021 · The MFJ-949E has an antenna selection switch, RF power range and peak or average reading switches and a switch for the meter illumination. 5-2000 ohms on 3. MFJ Pulsar VHF/UHF Base Vertical Antennas allow you to choose from a wide selection of Base/Repeater station antennas on different bands and with different gains and physical sizes. GigaParts (25582) 99. Specifications: Power requirements: 120 VAC 50/60 Hz at 5 Watts. All unused terminals are automatically grounded for static/lighting/RF protection. 5. The “E” model is probably wider as the Antenna Selector switch is on the front. That was easy enough to fix. 919 lb) / 0. General Information. The coaxial line outputs can be selected in tuned (with tuner's matching network in line) or direct (no matching circuit) configurations. Ameritron RCS-4 Remote Coax Switches are remote-controlled coax switches that select one of four outputs by supplying all control voltages through the coax. The MFJ- Allows for connection of 6 antennas with 1 com connector. Item Length. 5 to through 100 MHz are covered by this excellent station accessory. MFJ . The MFJ-941E will handle up to 300 Watts of transmitter RF output power. RF output power. They are slightly larger than the original box fan loop antenna but are still lightweight enough to take them The wattmeter is active in all positions of the ANTENNA SELECTOR. The extension's locking screws were not tightened properly and the whole shaft came out from the tuner with the knob. 8 MHz-150 MHz and handles 1500 Watts. Reviews: 1. 5 MHz. MFJ 4-Position Remote Antenna Switch The MFJ-4713 Remote Antenna Switch is designed to simplify your antenna setup by allowing you to connect up to four antennas using just one coaxial cable. Select the desired antenna with the ANTENNA and TRANS-MITTER controls to about 4. See MFJ-1898 mounted on a 5" magnet mount base. MFJ-259B. connection to balanced lines. Shop MFJ-1024, ANTENNA, SWL OUTDOOR ACTIVE ANTENNA, 50 KHz-30 MHz the official online Newmfjenterpr. MFJ-1784 and MFJ-1783 have larger butterfly tuning capacitors than the original MFJ-1782 and have a tripod mounting connector and carry handle. Most ATUs, like the MFJ-949E, have an inductance rotary switch and two variable capacitors. MFJ-1702C, ANTENNA SWITCH, 2 POS. Number of antennas positions: 5. 5-30 MHz. The MFJ-956 Pre-Selector/Antenna Tuner greatly improves reception from 15 to 30 MHz especially below 2MHz. It covers. MFJ. weather protected. This new box fan loop antenna covers 40-15 Meters at 300 Watts PEP SSB. 00 not operate the antenna selector while transmitting. MFJ’s 5/8 wave on 2M give you the maximum possible theoretical gain of any single element mobile antenna, no matter how much others cost. RCS-8VN: Same as RCS-8V but has N-type connectors instead of SO-239. Select from 2 antennas and 2 receivers. We have a great online selection at the lowest prices with Fast & Free shipping on many items! MFJ-225 Graphical Antenna Analyzer 4 Version 1B internal power, switch the selector switch to BAT . , Each. MFJ-223 1-60 MHz Color Graphic VNA Analyzer. Antenna Sharer SDR Transceiver TR Switch Aluminum Alloy Box Device 100W DC ‑160MHz Mfj. Reviews. $139. Pulsar ULTRA MightyGain Dual Band 144/440 MHz Base/Repeater Antenna. Its designed to safely handle the full SSB power of Ameritrons AL-811, AL-811H, AL-80B, ALS-500M, ALS-600 and other 1. The MFJ-962D is a "T" network roller inductor tuner with built-in antenna switching, RF power and SWR metering and a 1:1 balun. If the maximum noise and signal setting is not found set the inductor to the setting in TABLE 1 and procede to the next step. It also has three quality Teflon (R) SO-239 connectors for transmitter, antenna one and antenna two. Phone:(662) 323-5869. MFJ 259D 280 kHz - 230 MHz plus 2200 Meter Antenna SWR Analyzers MFJ-259D Antenna Analyzer, HF/VHF, Antenna/SWR/RF, LCD, 280 kHz-230 MHz, Dial Tune Knob, UHF Female, SO-239, 12 Vdc, Each Part Number: MFJ-259D Introduction. 8-3. MFJ 6-Meter Moxon Antenna. 95. Instruction Manual. 2 dB gain on 440 MHz. 4. It allows safe operation with 14 volts control voltage. MFJ-1898 will easily fit with your radio, antenna tuner and any other accessories into your backpack. Band Coverage: 2 meters. A special circuit in this tuner cancels the reactance of a ground lead or counterpoise, and reduces problems caused by RF "in the shack". Description: MFJs new Passive Preselector has extremely high dynamic range! It improves the performance of nearly any HF or shortwave receiver/transceiver. 5 GHZ MRF-901 transistor lets you receive really weak signals well into VHF. MFJ Passive Preselector with T/R Relay 1. MFJ Enterprises Inc , Ameritron , Hy-Gain , Hygain,Cushcraft , Vectronics , Mirage , MFJ, MFJ Enterprises , Antenna,Radio , Ham Radio , Amateur Radio , Tuner,Analyzer Review Summary For : MFJ-1020C Antenna Preamp/Preselector/Active antenna; Reviews: 4 MSRP: $ 99. 8 - 30 MHz, handles up to 2kW PEP or 1 kW CW. Apr 21, 2024 · Frequency Selector. The universal mount design allows the user to install the antenna in many ways. Forward power, reflected power, ground current, and SWR can be read on the ) Antenna Selector Switch: Heavy-duty ceramic switch with silver-plated contacts and six positions for routing a variety of loads to your transmitter or amplifier. SO-239 pigtail feedpoint. On 6M, it is a high performance full quarter wave antenna. Antenna Tuner, Dual Band VHF, Manual, Desktop, 144-225 MHz, 300 watts, Fixed Tuner Inductor Type, Each. The MFJ-969 wattmeter circuit does not function accurately if the Auto Tuner in The MFJ-962D uses a roller inductor "T" matching network. This tuner is designed for maximum RF output power levels of 800 MFJ-989C VersaTuner V. boosts weak stations. An antenna selector switch provides versatile antenna Mar 7, 2023 · MFJ-4726, ANT/XCVR DESK/REMOTE SWITCH, 6 POS, 1. Take it anywhere 0 its so tiny it fits in your pocket! Has on/off switch, power on LED, SO-239 Coax connector and detachable 20 inch telescoping antenna. Get it between Thu, Feb 8 and Sat, Feb 10. MFJ-1728M comes with a NMO connector. Pocket-Size, Incredible Performance! Truly accurate SWR, R, X and Z! This pocket-sized wonder breaks the mold for analyzer design with user-friendly convenience, top notch accuracy, and a vivid TFT multi-color display. 1dB. It reads information from the transceiver and selects the pre-programmed antenna automatically. 5-800 ohms on 1. (40-6 Meters). MFJ-956 Description Hide. 95; Description: This device functions as either an Antenna Preamplifier, Active antenna and/or pre-selector. Select the desired antenna with the ANTENNA SELECTOR. 7 oz (0. The MFJ-969 is a 300 watt RF output power antenna tuner that will match any transmitter or transceiver to virtually any antenna. Note that USB power will not charge your battery pack. The MFJ-1623 works well indoors mounted to MFJ Ham Radio Antenna Switch Black - MFJ-1701. Temporarily OUT of STOCK. Great for antenna restricted households and apartments. If your transmitter runs more than 200 watts of output power, set this switch to the 2000W HI (in) position. The MFJ-956 measures a compact 2 x 3 x 4 inches. 15 to 30 MHz -- especially below 2 MHz. MFJ-1896, 6-METER MOXON ANTENNA. Although it has suitable output isolation at 70dB or more for the HF band, it does not ground the unused output connector. MSRP: $139. any antenna with an impedance ranging from 12. The RCS-4 operates from 120 VAC, while the RCS-4X operates at 220/240 VAC. 875 inches) and scratch-proof multi-colored Lexan front panel. 2 kW SSB and 600 Watts CW. or Best Offer. MFJ-989D 1500 Watt legal limit Antenna Tuner. 65 out of 5 stars when antenna selector is switched to BYPASS, DIRECT COAX 1 or DIRECT COAX 2 positions. Never operate the tuner with the top removed. , yet delivers an amazingly clean cardioid pattern with 3. Features 8. The MFJ-941E employs a cross-needle meter so forward power, reflected power and SWR may be. The capacitors are often labelled ANTENNA and TRANSMITTER. 417 kg. 6 to 33 MHz HF band is covered in five overlapping bands. Next click the Product Manuals tab. Get both low angle radiation for excellent DX and high angle radiation for Choose from a wide selection of Base/Repeater Station antennas with different gains and lengths. Apr 22, 2023 · MFJ-1701 6-Position HF Antenna Selector Switch. 7 dB on 440 MHz. Frequencies from 1. ANTENNA SELECTOR: The ANTENNA SELECTORswitch utilizes eight positions. W/LIGHTNING PROTECTOR. 5-30MHz. The MFJ-949Bis designed to match virtually any transmitter to. 00. Doing so may permanently damage the relays. MFJ 4724 Desktop/Remote 4-Position Antenna/Transceiver Switches MFJ-4724. 300 Industrial Park Rd. It comprises two units: a Switch Box that goes near your antennas and a Control Box for your operating bench. Vertical Antenna Gain: 7. 5 feet tall, but big on gain. read simultaneously. A 1:4 voltage balun is built in for connection to balanced lines. Cover almost all of the HF bands plus 6-Meters for true portable field operation. Frequency: 1. Contact with the components inside the tuner while transmitting will result in painful RF burns. The meter's full scale forward and reflected power range is controlled by the left POWER switch that selects 2000W ( HI) or 200W ( LO ). 6-33 MHz MFJs new Passive Preselector has extremely high dynamic range! It improves the performance of nearly any HF or shortwave receiver/transceiver. MFJ-941C VERSA TUNER II This is an older MFJ tuner I bought used a number of years ago and the following is a brief review and comparison with two other tuners. Fan Loop Antenna. com & save up to 30% today. CROSS-NEEDLE SWR/WATTMETER: The meter on the MFJ-941E may be used alone or with the tuner. Power Capability: > 5kW Watts below 30 MHz, 1kW at 150MHz. Impedance is 50-75 Ohms. Apr 9, 2013 · The MFJ-949B is designed to match virtually any transmitter to almost any antenna, including dipoles, inverted vees, verticals, mobile whips, beams, random wires, and others fed by coax line, balanced lines, or a single wire. MFJ s 6-Meter Moxon for limited space features low SWR and a broad cardioid pattern with 5. 375 x 6. 8 to 30 MHz including MARS/WARC bands. Size: 110 x 56 x 82mm. barj53 (0) Seller's other items Seller's other items; Contact seller; US $300. Tuner by pass. not require adjusting with the dummy load). MFJs tiny 36 inch diameter loop antenna lets you operate 10 through 30 MHz continuously -- including the WARC bands! Ideal for limited space -- apartments, small lots, motor homes, attics, or mobile homes. The ATR-20 is the little brother of the Ameritron ATR-30 True Legal Limit antenna tuner! Its Ameritron Tough -- handles a full 1. The “C” model has it on the back. Antenna Selector The ANTENNA SELECTOR allows you to select 2 rear panel SO-239 coaxial connectors, either direct or through the tuner, an external dummy load connection, or a balanced feedline. 17 feet, shipped in two sections. Fully shielded metal enclosure. 12 Vdc, Wall Supply Not Incl. 2. Especially helpful to those with broadband front-ends that are prone to overload. 8 through 30 MHz. Boost your favorite stations while rejecting images, intermod, and phantom signals! The MFJ-956 Pre-Selector/Antenna Tuner greatly improves reception from . Enjoy both DX and local contacts mounted vertically. Also has PTT line T/R switching. Antennas MFJ Enterprises,INC. MFJ-1045C, PRE-SELECTOR The MFJ-959C provides proper impedance matching so you can. FREE delivery Thu, Apr 11. A 1:4 balun is built in for. The MFJ-969 wattmeter circuit does not function accurately if the Auto Tuner in The MFJ-941E will handle up to 300 Watts of transmitter. 1. No returns due to parts swappers. MFJs tiny 36 inch diameter loop antenna lets you operate 15 through 40 Meters continuously -- including the WARC bands! Ideal for limited space -- apartments, small lots, motor homes, attics, or mobile homes. Will be carefully packed for shipping. 5-dBi forward gain, high front-to-back ratio. overload. com. For Product Manuals first search for your item by entering the item number into the search box and pressing enter. NOTE! There are two (2) versions of the MFJ-986 tuner! The MFJ-941E is designed to match virtually any transmitter to any antenna, including dipoles, inverted-vees, verticals, mobile whips, beams, random wires, and others fed by coax lines, balanced lines or a single wire. Starkville MS 39759. Click here for More Info and to Shop Our Antenna Products Product Manual Guide. You can also plug in an antenna tuner, wattmeter, linear, etc so it is always connected to the antenna and transceiver selected. 3 dB on 2 Meters and 11. 8 dBi. Our highest gain Pulsar antenna. You may also select from mono, dual, or MFJ-962E is new and improved! New features include MFJs AirCore Roller Inductor, new aluminum-skirted knob set including a weighted deluxe spinner knob, ultra compact size (10. CAUTION: Do not use the MFJ-941C for over 300 watts of RF output power, or di rect oositiorli. The MFJ-969 uses a "T" matching network and covers all bands between 160 and 6 meters. Feedpoint is an SO-239 pigtail. Find Antenna Switches and get Free Shipping on Most Orders Over $99 at DX Engineering! An internal six position antenna-selector switch selects two coaxial line outputs, a single wire line-balanced line output, or an external dummy load connection. The MFJ-2703 does more than simply add an additional connector. The MFJ-962E is a "T" network roller inductor tuner with built-in antenna switching, RF power and SWR metering, and a 1:1 balun. The SWR/wattmeter of the MFJ-941C can be used with the tuner or by itself. Power requirements: 120 VAC @100mA, AC adapter The RCS-4 operates from 120 VAC, while the RCS-4X operates at 220/240 VAC. yp wz ku xt ki en kn hs mf ot