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write your own review of the AMERITRON ARB 704.
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WB4TJH
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Rating: 5/5
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Jun 28, 2009 11:07
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Works perfectly
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Time owned: 0 to 3 months
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It works just perfectly between my Yaseu FT-450 and Heathkit SB201 amplifier. I push the PTT on the MD-100 mike, and the amp relay keys just like it's supposed to. It required no mods to any of my gear, just plug and play.
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N5RMS
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Rating: 2/5
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Jun 5, 2009 06:59
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ARB 704
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Time owned: 0 to 3 months
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I ordered the ARB-704 interface box using an Icom 706MKIIG to key my external VHF amp. It was reccommended by a ham radio company in Texas. The box ONLY WORKS on HF/6mtr when attached to this radio. Short sighted on Ameritrons part. The Icom 706 uses two different lines to key external amps. One for HF/6Meters and a different one to key VHF/UHF. Sent the box back and made my own interface.
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W7DDD
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Rating: 5/5
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Apr 6, 2009 10:57
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Works fine
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Time owned: more than 12 months
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I also use it as an insurance buffer - guess that's why they call it a "buffer." Drive an AL-80B with a 756 Pro III, TS-830S, and Yaesu FT-857D for about 3 years without any problems.
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N3OQD
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Rating: 5/5
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Apr 4, 2009 22:32
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keying buffer
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Time owned: more than 12 months
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Even though I have a current low voltage keyed Ameritron AL-811, I still use this buffer just for good measure. In the event that I come across an older high voltage keyed linear, this unit would make it useable with my current trancievers.
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W4KVW
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Rating: 5/5
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Jan 30, 2009 15:11
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CHEAP INSURANCE!
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Time owned: more than 12 months
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My AMERITRON 811H works just fine without it with my ICOM 756 PROII but in my opinion it's a CHEAP INSURANCE POLICY.Better SAFE than SORRY.Just because I fell my gear is safer with it than without it I'll keep mine in line! }:>)
Clayton
W4KVW
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WA9VEE
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Rating: 2/5
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Jan 30, 2009 11:07
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Not needed with FT-897D and AL-811
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Time owned: 0 to 3 months
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I was sold one of these, along with the special 704 cable by a well meaning salesman as he thought it was required with the AL-811 amp I was buying new. It worked switching the AL-811 off and on for transmit, but the FT-897 acted strangely refusing to power off and also showing a blank screen when trying to power off. The 897 turned off OK as soon as I removed power from the 704.
A simple Din to RCA cable I had previously ordered off ebay then arrived, and I tried it, since the 897 manual says it can handle the 100ma switching current that the AL-811 uses. The cable works fine.
I will keep the 704, but since the simple cable works better, I will keep on using the simple solution.
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W2RS
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Rating: 5/5
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Aug 28, 2008 15:29
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Works great, no problems
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Time owned: more than 12 months
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I use the ARB 704 between my Orion II and 30L-1. Setting it up was a snap, and it's been problem-free ever since. The 30L-1's keying voltage of 170 VDC would fry the Orion without an interface or relay of some kind. With the ARB 704, the two are the best of friends.
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N2QQF
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Rating: 4/5
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Aug 15, 2008 06:06
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working well so far
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Time owned: more than 12 months
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I had one of these units previously that failed on me. I wont really bash it because I received it used and I wasn't certain that it was cared for very well. Anyhow, since it failed i decided to get another interface and use the same one because I inquired about another interface but they were not available. So far the new unit works well without any issues. I now use two units one for my Ameritron Amplifier and the other for my SB-220 without any glitches. I would buy one again if needed.
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WB7QXU
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Rating: 5/5
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Jun 10, 2008 19:29
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Works great
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Time owned: more than 12 months
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It is hard to blieve it is from (MFJ) Ameritron, but it works great for me. I use it to key my Icom 756PROII to my old Amps. It is really quick and silent. Works well with even my Heathkits which use 120V D.C. to ground. It will save my Icom's small relay from replacement. Most older amps have voltage and current that would damage newer solid state rigs. If you use an older Linear Amp, you need this product. I also use an Ameritron ICP-240 to turn my amps on and off, saves on Amps on/Off switches another must. If you have a Drake L-4(B) than this ICP-240 will save you switches from High Inrush Currents. The ICP-120 will save those old Drake AC-4 Power supplies for the high inrush currents as well.
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KA6OTJ
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Rating: 5/5
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Jun 10, 2008 12:52
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Works as Advertised right out of the box
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Time owned: months
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I have owned the ARB 704 for over two years and it has worked flawlessly. It is connected to an Ameritron Amp which is connected a Vecronics hft1500 tuner also made by MFJ. Both of them also worked flawlessly right out of the box. So do you know what I did right? I read the manuals and knew exactly what I was doing when I hooked everything up. Nuf said.
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