T36-1-KK81+

Product Overview

T36-1-KK81+ is a high-transformation-ratio RF transformer intended for 30 kHz to 20 MHz operation. Its 1:36 secondary-to-primary impedance ratio is far larger than the ratios used in most broadband baluns, making the part suitable when a low-impedance 50 Ω network must couple to a substantially higher-impedance balanced stage.

The limited upper frequency and very high ratio point to HF, low-frequency IF and instrumentation duties rather than microwave use. Voltage and current scale strongly through a 1:36 impedance transformation, so the winding orientation and connected load directly affect the achieved signal level. Mini-Circuits supplies this version in the KK81 surface-mount case with configuration C; these mechanical details are essential for exact replacement.

Key Features

• Manufacturer: Mini-Circuits
• Part Number: T36-1-KK81+
• Product Category: RF Balun / RF Transformer
• Device Type: high-ratio 1:36 core-and-wire RF transformer
• Frequency Range: 0.03 MHz to 20 MHz
• System / Port Impedance: 50 Ω
• Impedance Ratio: 1:36
• Package / Case: KK81, approximately 0.58 × 0.30 × 0.26 in
• Mounting Type: Surface mount
• Pin Configuration: C

Applications

• HF and low-frequency IF impedance transformation
• High-impedance balanced receiver or detector inputs
• Instrumentation and transformer-coupled amplifier networks below 20 MHz

Quality & Sourcing

Antrex Electronics can source T36-1-KK81+ for established RF and instrumentation BOMs. For these high-ratio or multi-winding transformers, approval should include winding topology, ratio, pin configuration, frequency response and exact case style because a visually similar unity-ratio balun will not reproduce the circuit behavior.