Best Antenna Tuner for FT-857D

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A tuner does not make an antenna better. It changes what the FT-857D sees at its coax connector — an impedance close enough to 50 ohms that the transceiver’s output stage is happy — while whatever mismatch exists between the antenna and the feedline stays exactly where it was. The loss from a bad match still happens out on the coax, as heat, whether or not a tuner sits between the radio and the cable. What a tuner buys you is a transmitter that is not straining against a bad SWR, plus, often, the ability to load up an antenna the radio would otherwise refuse to key into at all.

The FT-857D itself has no internal tuner. Unlike a few later Yaesu HF rigs, any impedance correction for this radio happens in an external box, full stop. That box can be a true automatic tuner the radio drives on its own, a semi-automatic one you trigger by pushing a button, or a manual tuner you peak by hand while sending a steady carrier. All three do the same underlying job; they differ in how much you have to do yourself and how fast.

‘Automatic’ is doing a lot of work in some of these product names. A tuner is only automatic on this radio if it has the right interface — a cable running from the FT-857D’s ACC or REMOTE jack to the tuner, carrying the keying and control signals that start the tuner and tell the radio to key a low-power carrier while it works. Buy the tuner without confirming that cable exists for this radio, and you have paid auto-tuner money for a box you still have to walk over and press a button on. LDG’s own AT-897Plus is the sharpest example of the trap: the model number reads like an FT-857 companion, and LDG states outright it is built for the FT-897(D), not this radio — the YT-100 is the one built for the 857.

Power rating is the other number worth checking against reality. The FT-857D puts out up to 100 watts PEP on HF and 6 meters, the bands these tuners are for, so most automatic units below clear that with little or no margin, while a couple of the manual tuners have real headroom to spare if an amplifier is ever in the picture. One entry here, the Elecraft T1, tops out at 20 watts and belongs on this radio only if you deliberately run reduced power for portable operating.

What follows mixes automatic and manual tuners across a wide price range, from a plain manual box with no connection to the radio at all up to a shack tuner with more headroom than this radio will ever need. Treat the specs and interface requirements as a starting point for your own research rather than a guarantee, and confirm current stock before ordering — a couple of the radio-specific tuners for this now-discontinued transceiver are getting harder to find new.

Pick 01 of 10

Yaesu FC-40 Automatic Antenna Tuner

Yaesu’s own automatic tuner for the FT-450, FT-857, and FT-897 series, driven directly through the radio’s own control circuitry rather than a third-party interface cable. Rated for 100 watts PEP, which matches the FT-857D’s HF and 6-meter output almost exactly, and housed in a sealed, weatherproof case built for outdoor or mobile mounting. Covers 1.8-54 MHz with a long random wire, or 7-54 MHz with the matching whip.

• Uses the FT-857D’s own tuner control circuitry, no separate interface cable to buy
• 100W PEP rating (3-minute max continuous) matches the radio’s HF/6m output
• Weatherproof housing for outdoor, mobile, or remote-mount installs
• 200 memories store settings per frequency for near-instant re-tune

Pros

• Built specifically for this radio family, nothing to mismatch
• No hunting for the correct interface cable
• Sealed case survives outdoor and mobile mounting

Cons

• 100W rating leaves no margin for a future amplifier
• Needs a random wire over 66 feet or the specific whip to use its full range
• The most expensive tuner on this list short of the Palstar

Price: $280–$320

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Pick 02 of 10

LDG YT-100 Automatic Antenna Tuner

LDG’s tuner built specifically for the FT-857, FT-897, and FT-100 series, connecting with a single cable rather than a generic LDG tuner plus a separately purchased interface. Rated 0.1-125W SSB/CW peak and 100W on digital modes and 6 meters, tuning loads from 4 to 800 ohms. LDG has scaled back this radio-specific line, so treat it as a search-and-compare purchase against current stock and secondhand listings rather than an always-in-stock item.

• Purpose-built for FT-857/FT-897/FT-100, single connecting cable
• 0.1-125W SSB/CW peak, 100W on digital and 6 meters
• Tunes 4-800 ohm loads
• 1.8-54.0 MHz continuous coverage

Pros

• No generic interface cable to source separately
• Power rating comfortably covers the FT-857D’s full output
• Broad tuning range for wire and vertical antennas

Cons

• Increasingly scarce new; check current dealer stock or used listings
• No built-in SWR/wattmeter display of its own

Price: $150–$220

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Pick 03 of 10

LDG Z-100Plus Automatic Antenna Tuner

LDG’s general-purpose automatic tuner, usable with almost any radio and needing as little as 0.1 watts to tune, which makes it friendly to QRP-style operating with the FT-857D turned down. Rated 125W SSB / 50W digital. It is not built specifically for this radio: full one-touch tuning from the FT-857D’s own controls requires the correct LDG Yaesu interface cable, sold separately — without it, the tuner still works, but as a push-button unit you operate by hand.

• 0.1-125W SSB, up to 50W digital
• Tunes with as little as 0.1W input
• 2,000 memories for instant frequency recall
• 1.8-54.0 MHz coverage

Pros

• Works with virtually any radio, not locked to Yaesu
• Very low minimum power needed to tune
• Broad memory bank speeds up repeat use

Cons

• Needs a separately purchased Yaesu interface cable for true one-touch operation
• Push-button operation without that cable, same as a manual tuner

Price: $180–$205

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Pick 04 of 10

LDG Z-11ProII Automatic Antenna Tuner

A compact, battery-powered LDG automatic tuner aimed at field and portable use alongside the FT-857D, running on 8 AA cells and weighing about 18 ounces. Rated 0.1-125W SSB, 100W CW, with power limits stepping down further on digital modes and 6 meters. Like the Z-100Plus, full automatic keying from the FT-857D needs the correct Yaesu interface cable purchased on top of the tuner itself.

• 0.1-125W SSB, 100W CW, lower limits on digital/6m
• Runs on 8 AA batteries, about 18 oz total weight
• 2,000 memories for frequency and tuning recall
• 1.8-54.0 MHz coverage

Pros

• Genuinely portable for field-day or backpack setups
• Battery operation means no shack power required
• Low standby current, batteries last a season of normal use

Cons

• Yaesu interface cable is a separate purchase, same as the Z-100Plus
• Small size means a smaller, more fragile control head

Price: $195–$220

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Pick 05 of 10

MFJ-993B IntelliTuner Automatic Antenna Tuner

A desktop automatic tuner with a built-in cross-needle SWR/wattmeter, rated 300W SSB / 150W CW into a 6-1600 ohm range — real headroom above the FT-857D’s 100 watts if an amplifier ever joins the station. Automatic operation with this radio needs the MFJ-5124Y interface cable, sold separately, which plugs into the FT-857D’s REMOTE jack and keys the radio into CW tune mode whenever the tuner’s TUNE button is pressed.

• 300W SSB / 150W CW rating, 6-1600 ohm range
• Built-in cross-needle SWR/wattmeter
• 20,000+ memories with fast recall
• 1.8-30 MHz coverage

Pros

• Power headroom well beyond the FT-857D’s own output
• Built-in meter means no separate SWR/wattmeter needed
• Fast retune from its large memory bank

Cons

• Requires the separately sold MFJ-5124Y cable for automatic Yaesu keying
• Larger desktop footprint than the field-oriented tuners on this list

Price: $220–$280

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Pick 06 of 10

MFJ-901B Manual Antenna Tuner

A straightforward manual tuner rated 200W PEP across 1.8-30 MHz, with no cable or interface to the radio at all — it sits inline on the coax, and you peak it by watching the FT-857D’s own SWR indication while sending a steady carrier. A real air-variable-capacitor and rotary-inductor design rather than a switched digital network, and the simplest, cheapest way here to keep the FT-857D’s finals happy.

• 200W PEP rating, 1.8-30 MHz
• Rotary inductor switch plus dual air-variable capacitors
• Built-in 4:1 balun for balanced feedlines
• No radio interface or power supply required

Pros

• Nothing to mismatch — no cable, no compatibility list to check
• Real components rated for genuine power handling
• Lowest cost way to protect the FT-857D from a bad match

Cons

• Fully manual — no automatic or one-touch tuning at all
• Tuning by hand is slower than an automatic unit, especially mid-QSO

Price: $90–$130

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Pick 07 of 10

MFJ-902B Travel Tuner

MFJ’s compact ‘Travel Tuner’ in a 4.5 x 2.25 x 2.25 inch case, rated 150W across 80-6 meters with real air-variable capacitors rather than a scaled-down toy network. Manual, with no interface to the radio, which makes it a natural pairing for FT-857D portable operating where every extra cable is one more failure point. Small enough to live in a field kit permanently.

• 150W rating, 80-6 meters
• 4.5 x 2.25 x 2.25 inch case
• Real air-variable capacitors and toroids, not a miniaturized network
• No radio interface or external power needed

Pros

• Genuinely pocket/backpack sized
• Power rating comfortably covers the FT-857D at full output
• Nothing to wire up or configure

Cons

• Manual tuning only, same tradeoff as the MFJ-901B
• Small controls can be fiddly to adjust precisely in the field

Price: $150–$200

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Pick 08 of 10

Vectronics VC-300DLP Antenna Tuner

A manual tuner with a built-in 50-ohm dummy load and cross-needle SWR/wattmeter, so a match can be roughed in on the dummy load before ever transmitting into the actual antenna. Rated 300W PEP / 150W continuous across 1.8-30 MHz, with an 8-position switch covering two coax feeds, a wire antenna, and the dummy load. No radio interface required.

• 300W PEP / 150W continuous, 1.8-30 MHz
• Built-in 50-ohm dummy load
• Backlit cross-needle SWR/wattmeter
• 8-position antenna/dummy-load switch

Pros

• Dummy load lets you test the match without keying into the antenna first
• Meter built in, no separate SWR bridge needed
• Solid power headroom above the FT-857D’s output

Cons

• Manual operation, no automatic keying
• Larger and heavier than the pocket-sized manual tuners here

Price: $110–$150

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Pick 09 of 10

Elecraft T1 Automatic Antenna Tuner

A genuinely tiny automatic tuner, 4.4 x 2.5 x 0.9 inches and about 5 ounces, that always hunts for a true 1:1 match rather than stopping at 1.5:1. The number that matters on this radio: it is rated for 0.5-20W SSB/CW input, a fifth of the FT-857D’s full HF output. It belongs here only for deliberately low-power, backpack-style operating with the FT-857D turned down, not as a full-power tuner.

• 0.5-20W SSB/CW, 10W FM/AM/digital
• 4.4 x 2.5 x 0.9 inches, about 5 ounces
• 1-2 second retune from memory
• Internal 9V battery, auto power-off

Pros

• Extremely small and light for a backpack or summit kit
• Always tunes to near 1:1 rather than settling for an acceptable SWR
• Simple internal battery power, no shack wiring

Cons

• Rated well under the FT-857D’s 100W output — feeding it full power risks damage
• Only useful on this radio if you run reduced power deliberately

Price: $160–$195

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Pick 10 of 10

Palstar HF-Auto Automatic Antenna Tuner

A high-end desktop automatic tuner rated to 1800W PEP using continuously variable roller-inductor-style matching and quiet stepper motors, with three antenna output ports and the ability to tune on as little as 2 watts. Vastly more headroom than the FT-857D can ever use on its own. Makes sense as a lifetime shack purchase if this radio is a base-station rig that might grow an amplifier someday, not as a first tuner for most FT-857D owners.

• 1800W PEP rating, 1.8-54 MHz
• Continuously variable roller-inductor-style matching
• Three switchable antenna output ports
• Tunes with as little as 2W drive

Pros

• Enormous power headroom for any future amplifier
• Quiet, precise stepper-motor tuning reported by owners
• Multiple antenna ports save a separate switch

Cons

• Expensive relative to every other tuner on this list
• Large desktop unit, not suited to portable use

Price: $1,550–$1,650

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Buying tips

• Confirm which interface cable your chosen tuner needs before buying — an ‘automatic’ tuner without the matching cable to the FT-857D’s ACC or REMOTE jack only tunes when you walk over and press a button on the tuner itself.
• Don’t confuse LDG’s AT-897Plus with a tuner for this radio — LDG states it is built for the FT-897(D), not the FT-857(D); the YT-100 is the model built for this radio.
• Match power ratings against the FT-857D’s real output: up to 100W PEP on HF and 6 meters, so a QRP-rated automatic tuner like the Elecraft T1 needs the radio turned down, not run at full power.
• A tuner protects the transmitter’s output stage from a bad SWR; it does not make a poor antenna radiate better — the loss from a mismatch still happens out on the feedline.
• The FT-857D has no internal tuner, unlike some later Yaesu HF rigs, so any impedance correction for this radio always happens in an external box.
• Manual tuners need no cable to the radio at all — you tune by watching the FT-857D’s own SWR meter while sending a steady carrier, slower than automatic but one less thing that can fail in the field.
• If an amplifier is already in the station or planned for later, size the tuner’s power rating against the amp’s output, not just the FT-857D’s 100 watts.
• A tuner with a built-in dummy load, like the Vectronics VC-300DLP, lets you rough in a match without transmitting into the actual antenna first.

As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.