The MFJ‑986 Differential‑T Tuner is a robust, high‑power manual HF antenna tuner built for operators who demand accuracy, efficiency, and wide‑range matching. Its Differential‑T network uses a unique dual‑section capacitor that simplifies tuning—achieving minimum SWR at a single setting and reducing the need for constant readjustment.

Designed to handle up to 3 kW PEP SSB amplifier input (≈1500 W output), the MFJ‑986 covers 1.8–30 MHz, including MARS and WARC bands. The AirCore roller inductor with a 3‑digit turns counter provides smooth, repeatable inductance control, while the lighted cross‑needle meter displays SWR, forward, and reflected power simultaneously.

A 6‑position antenna selector supports multiple feedline types including coax, balanced line, random wire, and external dummy load. MFJ’s TrueCurrentBalun ensures proper current balance, reducing RF feedback, pattern distortion, and interference.

Built with wide‑spaced capacitor plates, ceramic feedthroughs, and a high‑Q layout, the MFJ‑986 is engineered for reliability under high‑voltage, high‑power conditions.

This Rescue Rigs unit is working but needs TLC, with cosmetic wear and age‑related marks. Fully tested and sold as seen.

Key Features

• Differential‑T tuning network

• Handles 3 kW PEP SSB input / 1500 W output

• 1.8–30 MHz continuous coverage

• AirCore roller inductor with turns counter

• Lighted cross‑needle SWR/Power meter

• 6‑position antenna selector

• TrueCurrentBalun for balanced lines

• Ceramic feedthrough insulators

• High‑Q internal layout for efficiency

• Supports coax, balanced line, random wire, dummy load

Condition

• Working, tested

• Needs TLC – cosmetic wear, age‑related marks

• Sold as seen

Items in the Rescue Rigs category are sold strictly as seen, with no warranty, no returns, and no refunds. Some may be working, others may be suitable only for parts or repair.