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Author Topic: MFJ auto tuners  (Read 1953 times)
KB9QAK
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Posts: 1




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« on: February 23, 2012, 04:52:37 PM »

I have a Kenwood TS-480HX (200W PEP) and I am shopping for an auto tuner.  Is it true that the Kenwood AT-300 will limit the radio to 100 watts output? If so, what is the use for having 200-watt capability?!?  Do the MFJ auto tuners do the same?  I do appreciate if anybody has any experience with aftermarket tuners.

MFJ-993B, MFJ-929, or any LDG model that is capable of 200 watts
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N4NYY
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« Reply #1 on: February 23, 2012, 06:35:14 PM »

I would get the LDG that can take 200W. I have heard to many things about MFJ quality. Everyone I know with LDG, loves them.
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KJ4I
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Posts: 116




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« Reply #2 on: February 23, 2012, 07:56:27 PM »

I know MFJ has some QC issues with a lot of things but their line of auto tuners are pretty good. I have an MFJ-929 200 watt auto tuner and it works fabulous with my FT-950 and tunes just about anything I can put behind it. No QC issues with it whatsoever. I also like the digital readout it has. It is easy to use and you can get the interface cable for just about any modern rig. I highly recommend it.
« Last Edit: February 23, 2012, 07:59:08 PM by K4EKG » Logged
K0CBA
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Posts: 304




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« Reply #3 on: February 23, 2012, 09:25:00 PM »

Tokyo High Power labs makes a heck of a fine auto tuner.....a 200 watt version and a full power one.
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K8SI
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Posts: 21




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« Reply #4 on: February 24, 2012, 01:20:34 AM »

I have a TS-480HX, and I had a MFJ-993B originally when I bought the radio.  The 993 worked just fine, no problems. The trick is, don't use an interface cable.  As soon as you plug in an interface cable into the AT plug on the rig, it puts it in the 100w mode. Instead, I programmed my PF button to do a CW Tune at 20w.
73,
Jim  K8SI
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N4UM
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Posts: 484




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« Reply #5 on: February 24, 2012, 03:42:19 AM »

I've used several LDG AT-200 Pros with my TS-480HX.  Had one of them get cooked while running about 70 watts in one of the high duty cycle digital modes.  LDG repaired it at no charge. 

I also have an MFJ 998 1500 watt autotuner that I use remotely when running high power.  Other than the fact that it seems to get "confused" once in a while, it works fine and handles 1200 watts on CW with no problems. 

I think the MFJ autotuners are as good as anything else thats out there.
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AD6KA
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« Reply #6 on: February 25, 2012, 02:45:34 PM »

I would feel a little reticent about running 200 watts
into an auto tuner rated at 200 watts. (Have you ever looked
at the small inductors and caps in those little boxes?)

If you are just "smoothing out" relatively small SWR
bumps in an otherwise decent SWR antenna, that's OK.

But if you are using it for a multiband or compromise
antenna, especially a short antenna on the low bands,
I would like a lot more headroom.

Just a thought, Ken AD6KA
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WE1X
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Posts: 361




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« Reply #7 on: February 25, 2012, 02:48:04 PM »

I use the Tokyo Hy-Power HC-200AT. A bit pricey when compared to the MFJ and LDG units. However, the build quality is outstanding.

Harry WE1X
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