IFI Instruments T251-400 TWT Amplifier Repair and Calibration

$245.00 evaluation fee

🛡️ 90-Day Warranty ✓ Fee Credited to Repair ⚡ No Forms Needed

Factory-level IFI Instruments T251-400 TWT repair with NIST-traceable calibration. We restore full performance for line regulation and remote sensing functions.

Helpful Resources

📋 How It Works

Submit Request – Pay evaluation fee & provide equipment details
Ship to Us – Send your equipment to our Oregon facility
We Evaluate – Detailed diagnosis & repair estimate
Fee Credited – Your evaluation fee applies to repair cost
We Repair – Professional repair with 90-day warranty

🔧 Fast Turnaround: Most repairs are completed within 1–3 business days.
📏 Precision Calibration: NIST-traceable calibrations included for most repairs.
🛡️ Warranty: 90-day warranty on all repairs.
📝 Transparency: Detailed evaluation and repair estimate before work begins.

✓ Evaluation Fee Credited Toward Repair

This evaluation fee is applied as credit toward your final repair cost. After we evaluate your equipment, you'll receive a detailed estimate before any repair work begins.

Description

IFI Instruments T251-400 TWT Amplifier Repair and Calibration

The IFI T251-400 is a traveling-wave-tube (TWT) microwave power amplifier — ~400 W across a microwave band for EMC immunity testing and high-power RF applications. As a TWT amp, its behavior centers on the tube and its high-voltage supply, so faults concentrate there along with control and cooling — not the low-voltage power-supply faults its category label implies.

June Company repairs and calibrates the IFI T251-400 for EMC test labs and high-power RF teams.

Common IFI T251-400 problems we fix

Low or no RF output — TWT or its high-voltage supply degrading, the defining TWT-amp fault, diagnosed and repaired so it delivers rated power.
Line-regulation / output faults — power not holding, corrected.
Goes into fault/shutdown — HV-supply or protection faults, repaired.
Cooling faults — high-power TWT amps run hot; cooling service.
Control-interface faults — the tube/HV sequencing electronics, repaired.

FAQs

My T251-400 output dropped — repairable? Yes. We diagnose whether it’s the HV supply, control, or tube, repair the cause, and verify rated power and gain, with a NIST-traceable certificate.

Do you handle the high-voltage supply? Yes — the TWT HV supply is a core part of the repair.

Every repair includes NIST-traceable calibration and a 90-day parts-and-labor warranty. Email us or submit a service request.

Brand

IFI Instruments Repair

IFI Instruments power supplies are part of our regular repair and calibration work. IFI Instruments work by type: Power Supply Repair. Examples of IFI Instruments equipment we service: the IFI Instruments SMC250 RF Amplifier, IFI Instruments SMX100 RF Amplifier and IFI Instruments ST181-20 Microwave Amplifier. Each power supply from IFI Instruments leaves with NIST-traceable calibration and a 90-day warranty. You approve a firm IFI Instruments quote before work begins.

Shipping & Returns

Packing your equipment. You are responsible for packaging equipment adequately for transit. We strongly recommend the original manufacturer’s case, or double-boxing with at least two inches of shock-absorbing material on all six sides. We return your equipment in the packaging it arrived in, so please send it in packaging that will survive the return trip as well. If your packaging is damaged or inadequate for the return, we will substitute suitable packaging and may charge the cost of materials.

Insurance. Equipment is not insured by June Company while in transit. We strongly recommend insuring your shipment for its full replacement value.

Risk of loss. Risk of loss remains with you until your equipment is received at our facility, and transfers back to you when your repaired unit is delivered to the carrier (F.O.B. shipping point). June Company is not responsible for equipment lost, delayed, misdelivered, or damaged in transit, in either direction.

Return label. A prepaid and preprinted return shipping label should be included with your shipment. If one is not included, we will provide one.

Transit damage. Damage occurring in transit is the responsibility of the carrier. It is not a warranty defect and is not covered by the 90-day repair warranty. Any claim must be filed by you with the carrier; we will supply photographs and documentation to support it at no charge.

Full details: Terms & Conditions, Section 6 · Return Policy