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Author Topic: Yaesu FT-950 & Ameritron AL-811H -- Hooking them up?  (Read 4284 times)
W8DTW
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Posts: 9




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« on: May 05, 2011, 11:58:23 AM »

I am in the process of hooking up a Yaesu FT-950 and an Ameritron AL-811H amplifier.  I have the ARB/704 Buffer/Interface module and the appropriate multi-pin cable for the FT-950.  After reading the manuals on the radio and the amplifier I am more confused than ever as to which cables to connect to what plug.  I think the best answer to my problem will be found in another ham -- with the same equipment -- walkinh me through the set-up. To add further confusion to this problem, I also am adding an MFJ-962D "Versa-Tuner III" antenna tuner.   Any assistance will be appreciated...
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WB2WIK
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Posts: 20574




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« Reply #1 on: May 05, 2011, 03:20:49 PM »

Check the "Amplifiers" section.
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NK5G
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Posts: 102




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« Reply #2 on: June 03, 2011, 11:15:50 AM »

I also have an FT-950 and AL-811H.

Do a search on e-bay for FT-950 amplifier cables.

I found one two years ago that goes from the amplifier connection to the relay connection on the amp. Great cable, no problems at all.

CW-Man (also on ebay) has one that goes from the tuner connection on the radio to the amp. I have one of those as a spare and it works fine.

My only complaint about Yaesu are those stupid connectors. That's why I searched custom made cables on e-bay. Both are very well made and I think cost around $20.00.
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AB0DI
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Posts: 13




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« Reply #3 on: June 04, 2011, 12:10:34 PM »

I had this same setup for awhile.

The 8-pin DIN on the ARB704 cable goes to the 8-pin TUNER jack on the FT-100, not to the 10-pin Linear jack. For some reason, Ameritron doesn't make a 704 cable that uses the FT-950 linear jack.  An RCA cable then goes from the 704 to the AL-811H relay jack.  The ALC connection from the 704 to the 811H is not used as there is no ALC-IN on the FT-950 tuner jack.

If you want ALC, you need to buy or make a cable that uses the 10-pin jack and has two RCA plugs. However, this would mean not using the 704 (which is probably not necessary anyway). 10-pin cables were once available on e-bay, but I couldn't find one today. The one from Yaesu is outrageously priced.  I didn't have any problems with not using ALC.

There are discussions on the Yahoo FT-950 group about the need for ALC and other amplifier issues.

Feel free to contact me at [call]@arrl.net if I can be of further help.

Tom , AB0DI
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WB4TJH
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Posts: 191




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« Reply #4 on: June 17, 2011, 06:31:57 PM »

The "speicalty cable" made for the Yaesu goes between the 704 and the radio. The one with the phono plug goes into the amp on one end, and into the 704 on the other. I use this combo for both my FT450 and IC-7000 and it works perfectly.
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N9GGG
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Posts: 101




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« Reply #5 on: June 18, 2011, 02:18:06 PM »

where did you find a specialty cable to hook up the ft-950 and a 811h..........thanks
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