Arb 704 relay It has an Icom control cable to run from accessory on the 7300 and cable to run from the alc on the 7300 direct to the 704. ARB-704 type Amplifier keying relay buffer Jan 2, 2011 · RCA cable from TX1, TX2 or TX3 on back of flex 6500 to the radio jack on ARB-704 then another rca cable from the AMP jack on the arb-704 to the RLY jack on the back of the AL-80b. ) Nov 17, 2018 · Ok thanks everyone. Besides, you will want to use an ARB-704 Interface as low-cost insurance to protect your transceiver against any keying pulse or high voltage amplifier relay! Use an ARB-704 to protect your radio with an Ameritron ARB-704 Amplifier Keying ARB-704 Quick Connect \ The ARB-704 connects between the radio and amplifier, preventing damage to the radio from amplifier voltages. « Sep 3, 2022 · Ameritron ARB-704 Schematic Addeddate 2022-09-03 18:38:31 Identifier ameritron_ARB-704_Schematic Identifier-ark ark:/13960/s2tck0mjjw6 Ocr tesseract 5. RCA cable to the amp. The HRT ARB1X1 is a versatile relay buffer designed to protect your radio and optimize performance. Except for AC switching, the DXE-SV-KR replaces the Ameritron ARB-704, featuring a two ground independent isolated keying outputs,. Also thanks KC7ES, but with the postal strike here in Canada shipping is a no go. It can handle a wide range of input and output voltages and currents. Perfect protection for your transceiver. Buy It Now. Dick W0RAA----- Original Message ----- Alright, the 70 - 300, for example, but with the with all the other radios that don't use a 13 pin, then you would get the ARB 704 and then a Cable that goes from the back of this unit to the back of the radio right or if you're not gonna do it that way you could do it this way with one of these cables from the radio to this unit and then one Connecting an Ameritron AL-80B Amplifier to any FLEX-6000 using an ARB-704 is a very straightforward proposition. This includes, but is not limited to, Ameritron, B&W, Collins, Command, Dentron, Heathkit, Selling several Ameritron arb 704 relay Will come with rca cables Power cable All in good condition Save some money Metal box shielded well </p><p>Some of the plastic box copies are not shielded as good </p><p>Free shipping </p><p>Listing is for one not all 3 for 49 thanks </p> This document provides an instruction manual for the Ameritron ARB-704 interface buffer. To prevent this an additional buffer relay like the ARB-704 is used. This includes, but is not limited to, Ameritron, B&W, Collins, Command, Dentron, Heathkit, The ARB-704 works with any relay voltage (AC, positive, or negative) up to 200 peak volts and any relay current up to 300mA. It is noiseless, has a very long life, and will not develop dirty contacts. New price for both (ARB-704 and PNP-10MY) is about $140. Then, connect the 13-pin end into the ACC jack of the Icom 706. ARB-704 type Amplifier keying relay buffer The ARB-704 is noiseless, has very long life, and will not develop dirty contacts. The ARB-704I2 is fully compatible with conventional amplifier relay systems. This "hot it to of to Hot as "elie Besides bein ro freq "dot" might ARB-704 ARB-304, On CW, all like AA4MM like ælay nwving long life. Besides, you will want to use an ARB-704 Interface as low-cost insurance to protect your transceiver against any keying pulse or high voltage amplifier relay! Use an ARB-704 to protect your radio with an Ameritron ARB-704 Amplifier Keying the ARB to the Amplifier's Relay. 9% positive; Seller's other items Seller's other items; High voltages or voltage peaks can destroy the keying stage of the transceiver. Find many great new & used options and get the best deals for Allow ARB-704 FOUR radios to key an Amplifier keying adapter relay interface at the best online prices at eBay! Free shipping for many products! Feb 14, 2025 · Allow ARB-704 FOUR radios to key an Amplifier keying adapter relay interface. It is especially suited for buffering vacuum relay QSK amplifiers, since the ARB-704I2 does not affect attack or release times in a deleterious manner. Besides, you will want to use an ARB-704 Interface as low-cost insurance to protect your transceiver against any keying pulse or high voltage amplifier relay! Use an ARB-704 to protect your radio with an Ameritron ARB-704 Amplifier Keying Explore a wide range of our Arb 704 selection. You will not need a power source as the ARB-704 gets it's power through this cable. You can't beat the old fashioned mechanical relay!!!! If you plan to use one of these with a 30L-1 - think again, the -170v is not good for these solid state switches, no matter what the manufacturers say! This case study may be useful if you encounter the same fault with your ARB-704 73 They may only be used with an ARB-704 and cannot be used for connecting a radio directly to an amplifier. MFJ, owner of the Ameritron product line, ceased production of the ARB-704 after the company closed shop in May 2024. , Each It works with any relay voltage (AC, positive or negative) up to 200 peak volts and any relay current up to 300 mA. The ARB-704 works with any relay voltage (AC, positive, or negative) up to 200 peak volts and any relay current up to 300mA. The manual describes the connections, settings, and operation of the ARB-704 to integrate it into a radio and amplifier Virtually any radio can directly operate the ARB-704. It is noiseless, has very long life, and will not develop dirty contacts. 1. Some calculators may have more than one log button, in which case you want the LOG10 button (logarithm base ten is how that’s read). Estos cables son para Relay, ACL y control del Amplificador. Besides, you will want to use an ARB-704 Interface as low-cost insurance to protect your transceiver against any keying pulse or high voltage amplifier relay! Use an ARB-704 to protect your radio with an Ameritron ARB-704 Amplifier Keying Jan 30, 2025 · MFJ ARB-704, RADIODAN RBI-1, AMPKEYER and many others. Find top brands, exclusive offers, and unbeatable prices on eBay. Sep 3, 2022 · Ameritron ARB-704 Manual Addeddate 2022-09-03 18:37:39 Identifier ameritron_ARB-704 Identifier-ark ark:/13960/s2xw4k0245s Ocr tesseract 5. An adjustable ALC Out voltage is also available from the linear amplifier that can be fed back to the FTDX 1200 to limit the exciter drive to legal and I had them connected using the Ameritron ARB-704 relay buffer. Besides, you will want to use an ARB-704 Interface as low-cost insurance to protect your transceiver against any keying pulse or high voltage amplifier relay! Use an ARB-704 to protect your radio with an Ameritron ARB-704 Amplifier Keying It works with any relay voltage(AC, positive or negative) up to 200 peak volts and any relay current up to 300 mA. 35 milliamperes and very low voltages when using the ARB-704. Archive. 00 (lower 48 only). relay" pull-in delay, radio's signal appe. Dec 8, 2024 · When used as Two radios to One amp - the center cable goes to your amplifier (the other two go to your radio T/R keying, we suggest our RBI-1 interface). It draws very little current from radios and limits the voltage applied to radios. Measures 4 ¼" x 1 ¾" x 2 ¼". I've seen a couple of message threads like this from people using the ARB-704. ARB-704 a great way to protect your transceiver. Not necessarily cheap, but it’s good and I have one on every modern transceiver. 0-1-gc42a They may only be used with an ARB-704 and cannot be used for connecting a radio directly to an amplifier. HRT ARB-1x1 Amplifier Relay Buffer Ameritron ARB-704, RADIODAN RBI-1 Type. It has no moving parts unlike isolation relays. It draws very little current from the radio's control line and allows the user to set the output voltage between 3-30 volts. The ARB-704 connects to the TUN/LIN port on the back of the rig so that port is not available for use with an external tuner. Ameritron_ARB-704_Manual - Free download as PDF File (. 00. They have no moving parts, switch almost instantly, are noiseless, have very long life, and will not develop dirty contacts. DX Engineeering KD9SV Keying "Relay" - Solid State - PTT input requires only 2 mA to close both ground independent PTT outputs; + or – 450 VDC maximun 500mA , each ARB-704 Quick Connect The ARB-704 connects between the radio and amplifier, preventing damage to the radio from amplifier voltages. The Ameritron ARB-704 is a semiconductor keying buffer to control the PTT line of nearly any amplifier. When I had my TS-590 and a AL811 I had the ARB-704 but I had to have a special PNP cable to operate the 704. It is a great way to protect your radio from the load imposed on the radio by the amplifiers transmit relay. Installation involves Using this ARB-704 with an Icom 746Pro and an Ameritron AL-80B. Datos Técnicos. Although modern transceivers (mostly) have a teeny relay to effect a contact closure to key a linear amplifier, it’s risky using a direct connection. Even if your internal radio switching looks like it might be usable, it is wise to have an extra degree of isolation between your amplifier and radio with our relay buffer interface. y completely amplifi. It is especially suited for buffering vacuum relay QSK amplifiers, since the it does not affect attack or release times in a deleterious manner. 2. As noted at the very bottom of Page 12-1 of the IC-7300 manual: "When the Send terminal controls an inductive load, such as a relay, a counter-electromotive force can malfunction or damage the transceiver. The safest way to tell if the ARB-704 will work is to look at the relay connection on the amplifier Explore a wide range of our Arb 704 selection. After a few minor cabling modifications the ARB-704 was found to work as it was intended. Jan 7, 2025 · ARB-704 type Amplifier keying relay buffer interface RBI-1A switching 500 SOLD! radiodan-w7rf (15959) Arb Canopy; Ryobi Rac124; Rab Firewall Jacket; Rab 1100 They may only be used with an ARB-704 and cannot be used for connecting a radio directly to an amplifier. May 8, 2024 · Ham Radio amplifier amateur amatuer radio amplifier relay interface Yeasu. 200 volts DC or peak AC, and carry relay currents up The ARB-704 works with any relay voltage (AC, positive, or negative) up to 200 peak volts and any relay current up to 300mA. Jan 31, 2025 · MFJ ARB-704, RADIODAN RBI-1, AMPKEYER and many others. radiodan-w7rf (15809) 99. It can interface radios that provide positive or negative control voltages to power amplifiers rated up to 200V and 200mA. It works with any relay voltage(AC, positive or negative) up to 200 peak volts and any relay current up to 300 mA. With Ameritron's radio interface cables, interconnection was a snap. Feb 10, 2025 · They may only be used with an ARB-704 and cannot be used for connecting a radio directly to an amplifier. CAUTION: DO NOT use the ARB-704 with amplifier relays that are not pulled to ground to activate! Connect the 5-pin end of the "plug and play cable" in to the multi-port of the ARB. Mar 4, 2025 · Replaces or upgrades several previous designs like the MFJ ARB-704, RADIODAN RBI-1, AMPKEYER and many others. Then the 704 has an amp out and alc out to run direct to the 811. The ARB-704 has no moving parts and switches almost instantaneously. 00, shipped to your door for $70. To install it, the user connects the ARB-700 between the radio's control line and the amplifier's relay control line. Logarithm. It is very versatile and unlike dedicated buffers sauch as though designed expressly for the 746 Pro this buffer covers virtually any rig/amp combo one can come up with. From the manual The TX GND OUT pin (pin 2) of the TUN/LIN jack is a transistor "open collector" circuit. The ARB-704 is fully compatible with conventional amplifier relay ststems. Is this ARB 704 going to achieve what your suggesting? They may only be used with an ARB-704 and cannot be used for connecting a radio directly to an amplifier. Everything else on the back of the ARB-704 remains the same. MFJ ARB-704, RADIODAN RBI-1, AMPKEYER and many others. The ARB-704 works with all standard manufactured amplifiers including those with positive, negative, and AC relay lines. This includes, but is not limited to, The ARB-704 works with any relay voltage (AC, positive, or negative) up to 200 peak volts and any relay current up to 300mA. Ameritron ARB-704 standby BYPASS switch Amplifier keying relay interface | eBay Even if your internal radio switching looks like it might be usable, it is wise to have an extra degree of isolation between your amplifier and radio with our relay buffer interface. Jan 30, 2025 · Ham Radio Tech Deluxe Amp Relay Buffer replacement MFJ ARB-704, RADIODAN RBI-1 (#286211826671) 1***s (362) - Feedback left by buyer. Datos Técnicos; They may only be used with an ARB-704 and cannot be used for connecting a radio directly to an amplifier. Past 6 months. org ARB-704 a great way to protect your transceiver. radiodan-w7rf (15981) 99. Besides, you will want to use an ARB-704 Interface as low-cost insurance to protect your transceiver against any keying pulse or high voltage amplifier relay! Use an ARB-704 to protect your radio with an Ameritron ARB-704 Amplifier Keying Find many great new & used options and get the best deals for Ameritron ARB-704 BLACK BYPASS switch Amplifier keying relay interface radio at the best online prices at eBay! Free shipping for many products! Dec 18, 2024 · A better idea is an isolated connection like the ARB-704. Dec 10, 2024 · The DX Engineering KD9SV Keying Relay (DXE-SV-KR) makes a great replacement for the popular Ameritron ARB-704 Amplifier Transceiver Keying Interface (without the specialized “multi” plug transceiver cables or AC switching). Free delivery. I have not been using a ARB-704 with my current AL80B and 6300 setup. negative) to y relay up is fully for attack o that wide of elay QSK ARB-704 In to Jul 17, 2023 · Sale includes ARB-704 relay cable and the Ameritron PNP-10MY cable to connect Yaesu FTDX-10, FT-450 950 1200 to the ARB-704 interface. " They include one power connector cord and plug with red wire (+12 V), black wire (negative and ground), and three mono patch cords with phono (RCA) connectors on each end, designed to be used for relay, ALC, and amplifier control lines. I have an AL-811 (Not the H) and it works great with the FT-950. You will need a so-called “scientific calculator” to do logarithms. High voltages or voltage peaks can destroy the keying stage of the transceiver. The ARB-704 can safely handle open circuit voltages up to . $89. After reading comments on the Internet, I have a few questions for those who may have a similar layout or knowledge on this particular matter if possible: 1-. Image 2 . it ditty It with AC, or control ARB-704 an with Rlay IA C. txt) or view presentation slides online. The other end is inserted into the Multi-Port socket on the back of the ARB-704 relay buffer. It works great and keys my AL-811 just ARB-704 Quick Connect \ The ARB-704 connects between the radio and amplifier, preventing damage to the radio from amplifier voltages. Then in radio setup transmit tab make sure you enable the correct TX relay. It operates with negative, AC, or positive amplifier relay control lines. 0-1-gc42a I decided to use an Ameritron ARB-704 relay buffer to isolate and protect the TX GND (transmit ground) signal from the FTDX 1200 exciter to key my AL-811H linear amplifier via the Relay input. The safest way to tell if the ARB-704 will work is to look at the relay connection on the amplifier panel. Jan 8, 2010 · So no relay buffer is required. ) Connect an RCA mono cable from TX1, TX2 or TX3 on back of FLEX-6000 (A FLEX-6500 is shown below in Image 1) to the RADIO jack on ARB-704 (Shown below in Image 2) Image 1 . 9% positive; The ARB-702I is a device that protects radios from damage caused by excessive voltage or current from power amplifiers. The 12 Volt line can be unplugged from the ARB-704, as the power comes from the cable. HRT ARB - 1X4. I used an LDG tuner that connected to the rig through the REM/ALC connection so that the tuner and amp could both be connected. The ARB-704 works with any relay voltage (AC, positive, or negative) up to 200 peak volts and any relay current up to 300mA. com, "force2ak" <force2ak@> wrote: Trying to find out if anyone interfaced the Ameritron ALS-600S linear to the FT-950, and if so is the ARB-704 relay buffer required and what cables would be required to hook up the Ft-950 to the ALS-600s and ARB-704. It is especially suited for buffering vacuum relay QSK amplifiers, since the ARB-704 does not affect attack or release times in a deleterious manner. NOTE: DO NOT connect power to the ARB's power jack. I purchased the ARB-704 about 8 months ago to serve as an interface between my Yaesu FP-897D and my Ameritron AL-572. They also connect a power supply The ARB-704 works with all standard manufactured amplifiers including those with positive, negative, and AC relay lines. Opens in a new window or tab. Based on the ARB-704 manual, it would be connected as follows: 1) ARB-704 TX-SEND jumpers set for LOW SYSTEM; 2) ARB-704 J2 (Radio) connects to the Flex 6300 TX Relay KEY line; 3) ARB-704 J1 (AMP) line connects to the amplifier key line. Ameritron Arb-704 Schematic I decided to use an Ameritron ARB-704 relay buffer to isolate and protect the TX I also have an LDG AT-1000ProII Autotuner which has a one button manual. The ARB-704 has many electrical advantages over conventional relay buffer systems. This includes, but is not limited to, Ameritron, B&W, Collins, Command, Dentron, Heathkit, Kenwood, and Yaesu amplifiers. pdf), Text File (. It works with any relay voltage (AC, positive or negative) up to 200 peak volts and any relay current up to 300 mA. Looking at the schematic of the ARB-704 I don't see any combination of jumper configurations that would injure the transistor in the FT-991A. It handles voltages up to 200V and currents up to 300mA. Besides, you will want to use an ARB-704 Interface as low-cost insurance to protect your transceiver against any keying pulse or high voltage amplifier relay! Use an ARB-704 to protect your radio with an Ameritron ARB-704 Amplifier Keying Ameritron ARB-704 Amplifier Keying Interface Cables PNP-8MK Amplifier Keying Interface Cable for ARB-704, 8-pin mini-DIN Kenwood, TS-480SAT and HX only, 36 in. I've used an ARB-704 for over a year, interfacing an FT-100D, a TS-450 and an IC-7000 to an AL-80B. 73, Jon, NS4SC--- In FT-950@yahoogroups. I had them connected using the Ameritron ARB-704 relay buffer. -----Earlier 5-star review posted by K9XT on 2006-11-11 I am very pleased with the flexibility of the ARB-704. The 8 pin DIN plug is inserted into the Linear socket on the 950. The ARB-704 is supplied with the following Dec 19, 2024 · Replaces or upgrades several previous designs like the MFJ ARB-704, RADIODAN RBI-1, AMPKEYER and many others. The ARB-704 is designed to safely interface radios and amplifiers by buffering the control signals between them. 29 watchers . The ARB-704 is fully compatible with conventional amplifier relay systems. Besides, you will want to use an ARB-704 Interface as low-cost insurance to protect your transceiver against any keying pulse or high voltage amplifier relay! Use an ARB-704 to protect your radio with an Ameritron ARB-704 Amplifier Keying Sep 3, 2022 · An icon used to represent a menu that can be toggled by interacting with this icon. 9% positive; The ARB-700 is designed to protect radios from damage caused by excessive voltage or current from power amplifiers. Nearly any amplifier relay system is compatible with the ARB-704. We seen a need for a better buffer relay. 2. The ARB-704 works with all standard manufactured amplifiers, including those with positive, negative and AC relay lines. Thanks - Alan El ARB-704 reemplaza a los Interface Buffer (702I, 702I2, 702K, 702Y). Verified purchase. Sale final for the usual reasons. The ARB-704 has no moving parts, switches almost instantaneously. They may only be used with an ARB-704 and cannot be used for connecting a radio directly to an amplifier. Brand New. A better idea is an isolated connection like the ARB-704. Ameritron amplifier transceiver keying interfaces have many electrical advantages over conventional relay buffer systems. I will also add that when using the ARB-704 with a 706/7300 it is a one cable set-up using the PNP-13D ACC Cable, with the 13 pin side going to the 7300 ACC Socket and the other end to the ARB-704 Multi-Port Socket, and since a 706/7300 ACC Socket provides the necessary power to run the ARB-704 Xmit LED, you won't need to use a wall wart to Jan 6, 2025 · ARB-704 type Amplifier keying relay buffer interface RBI-1A switching 500 SOLD! radiodan-w7rf (15943) 99. It works a treat and was super easy to hookup. The ARB-704’s unique output circuit pulls either positive or negative amplifier relay control lines to ground. Feb 7, 2019 · If I am correct the ARB704 will do exactly what your suggesting I buy from Ebay. The HRT ARB1X4 is a versatile relay buffer designed to protect your radio and optimize performance. The transmitter only switches currents under . Besides, you will want to use an ARB-704 Interface as low-cost insurance to protect your transceiver against any keying pulse or high voltage amplifier relay! Use an ARB-704 to protect your radio with an Ameritron ARB-704 Amplifier Keying Dec 30, 2024 · Allow ARB-704 TWO radios to key an Amplifier keying adapter relay interface. Besides, you will want to use an ARB-704 Interface as low-cost insurance to protect your transceiver against any keying pulse or high voltage amplifier relay! Use an ARB-704 to protect your radio with an Ameritron ARB-704 Amplifier Keying It plugs into the Multi-Port socket on the rear of the ARB-704 Relay Buffer and then into the Tuner socket on the rear of the FT-950. Oct 12, 2014 · Hello, Aside to the FT-950, I have recently acquired a second hand Ameritron AL-811 linear and a ARB-704 buffer plus the PNP-8M cable setup. HRT ARB-1X1. Ham Radio Tech Amplifier Relay Buffer.
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