---
product_id: 448235027
title: "AMPTATAM2-300B Amplifier Vacuum Tube Bias Cathode Current Tester mA Version Tool for 300B 2A3 101D 102D VT25 VT52 275A 6A3 71A 801 201 26 10 50 250 45 75 205 104"
brand: "amptata"
price: "A$29"
currency: AUD
in_stock: true
reviews_count: 1
url: https://www.desertcart.com.au/products/448235027-amptatam2-300b-amplifier-vacuum-tube-bias-cathode-current-tester-ma
store_origin: AU
region: Australia
---

# mA measurement 65cm wire length 24K gold connectors AMPTATAM2-300B Amplifier Vacuum Tube Bias Cathode Current Tester mA Version Tool for 300B 2A3 101D 102D VT25 VT52 275A 6A3 71A 801 201 26 10 50 250 45 75 205 104

**Brand:** amptata
**Price:** A$29
**Availability:** ✅ In Stock

## Summary

> 🔧 Tune Your Sound to Perfection!

## Quick Answers

- **What is this?** AMPTATAM2-300B Amplifier Vacuum Tube Bias Cathode Current Tester mA Version Tool for 300B 2A3 101D 102D VT25 VT52 275A 6A3 71A 801 201 26 10 50 250 45 75 205 104 by amptata
- **How much does it cost?** A$29 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/448235027-amptatam2-300b-amplifier-vacuum-tube-bias-cathode-current-tester-ma)

## Best For

- amptata enthusiasts

## Why This Product

- Trusted amptata brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **User-Friendly:** Easy to use with a multimeter for quick readings.
- • **Durable Design:** Constructed with high-quality Bakelite and gold plating for longevity.
- • **Professional Grade:** Ideal for audiophiles and technicians seeking top-notch performance.
- • **Precision Measurement:** Accurately measures cathode current for optimal bias settings.
- • **Universal Compatibility:** Works seamlessly with a wide range of vacuum tubes including 300B, 2A3, and more.

## Overview

The AMPTATAM2-300B Amplifier Vacuum Tube Bias Cathode Current Tester is a professional-grade tool designed for precise measurement of cathode current in various vacuum tubes. With its durable construction and universal compatibility, this tester ensures optimal bias settings for enhanced audio performance.

## Description

AMPTATAM2-300B Amplifier Vacuum Tube Bias Cathode Current Tester mA Version Tool for 300B 2A3 101D 102D VT25 VT52 275A 6A3 71A 801 201 26 10 50 250 45 75 205 104

## Features

- M2-300B suitable for 300B 2A3 101D 102D VT25 VT52 275A 6A3 71A 801 201 26 10 50 250 45 75 205 104 etc.
- M2-300B test tool is through multimeter get tube's mA
- Measures the cathode current of the power tube for bias reading (at low voltage side of the tubes )
- High-Quality 24K Gold Plated Banana Plug Male Speaker Cable Connectors
- M2-300B wire length about 65cm. Bakelite socket and plated Gold for long life

## Images

![AMPTATAM2-300B Amplifier Vacuum Tube Bias Cathode Current Tester mA Version Tool for 300B 2A3 101D 102D VT25 VT52 275A 6A3 71A 801 201 26 10 50 250 45 75 205 104 - Image 1](https://m.media-amazon.com/images/I/51UZnvpjl2L.jpg)
![AMPTATAM2-300B Amplifier Vacuum Tube Bias Cathode Current Tester mA Version Tool for 300B 2A3 101D 102D VT25 VT52 275A 6A3 71A 801 201 26 10 50 250 45 75 205 104 - Image 2](https://m.media-amazon.com/images/I/612VZDmVL4L.jpg)
![AMPTATAM2-300B Amplifier Vacuum Tube Bias Cathode Current Tester mA Version Tool for 300B 2A3 101D 102D VT25 VT52 275A 6A3 71A 801 201 26 10 50 250 45 75 205 104 - Image 3](https://m.media-amazon.com/images/I/61oKWC+W7QL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐ 1.0 out of 5 stars







  
  
    Came broken.
  

*by N***N on Reviewed in the United States on September 25, 2023*

Came broken so we will never know if it once worked.

---

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---

*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-03-04*