---
product_id: 323213892
title: "Electro-Harmonix 12AT7 EH Preamp Vacuum Tube, Single"
brand: "electro-harmonix"
price: "AR$110588"
currency: ARS
in_stock: true
url: https://www.desertcart.com.ar/products/323213892-electro-harmonix-12at7-eh-preamp-vacuum-tube-single
store_origin: AR
region: Argentina
---

# Superior dissipation for reliability Perfect for guitar amp circuits 12V DC power optimized Electro-Harmonix 12AT7 EH Preamp Vacuum Tube, Single

**Brand:** electro-harmonix
**Price:** AR$110588
**Availability:** ✅ In Stock

## Summary

> 🎶 Elevate your sound with the power of precision!

## Quick Answers

- **What is this?** Electro-Harmonix 12AT7 EH Preamp Vacuum Tube, Single by electro-harmonix
- **How much does it cost?** AR$110588 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/323213892-electro-harmonix-12at7-eh-preamp-vacuum-tube-single)

## Best For

- electro-harmonix enthusiasts

## Why This Product

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

## Key Features

- • **Amp-Ready Versatility:** Seamlessly integrates into guitar amp circuits for rich, dynamic tone shaping.
- • **Reliable Power Handling:** Superior dissipation outperforms NOS tubes, delivering consistent, long-lasting operation.
- • **HiFi-Grade Sound Clarity:** Experience pristine audio with the best 12AT7 tube choice for high-fidelity setups.
- • **Robust Twin Triode Design:** Large plate format ensures enhanced performance in driver and reverb circuits.
- • **ECC81 Equivalent Compatibility:** Easily replaces ECC81 tubes, making upgrades and repairs hassle-free.

## Overview

The Electro-Harmonix 12AT7 EH Preamp Vacuum Tube is a high-quality, single twin triode tube designed for superior audio performance in HiFi and guitar amplifier circuits. Featuring a large plate format for enhanced dissipation and reliability, it operates at 12 volts DC and serves as a direct ECC81 equivalent, making it an essential upgrade for musicians and audiophiles seeking rich, dynamic sound.

## Description

Electro-Harmonix 12AT7 EH Preamp Vacuum Tube, Single

## Features

- Best 12AT7 choice for HiFi
- Also suitable for guitar amp circuits
- Single tube
- ECC81 equivalent

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Item Weight | 18 g |
| Product Dimensions | 2.54 x 2.54 x 6.99 cm; 18 g |
| Item model number | 12AT7EH |
| Voltage | 12 Volts (DC) |

## Product Details

- **Item dimensions L x W x H:** 25 x 25 x 70 millimeters
- **Voltage:** 12 Volts (DC)
- **Manufacturer:** New Sensor
- **Mounting type:** Surface Mount
- **Brand:** Electro-Harmonix

## Images

![Electro-Harmonix 12AT7 EH Preamp Vacuum Tube, Single - Image 1](https://m.media-amazon.com/images/I/71uO6qeikSL.jpg)

## Questions & Answers

**Q: Why is Mine not working**
A: It could be a bad tube or the amp itself. We are more than happy to set up a return if the tube is bad, but we can not verify without testing the tube. We suggest consulting a professional repair tech to verify if the amp is the problem or if the tube is bad. If they conclude that the tube is the issue, get in touch with us to set up a return/exchange.

**Q: What are the shipping  dimensions of this item?**
A: From a web search ... the "mechanical" (NOT shipping) dimensions of the tube are below.  However, shipping dimensions would vary depending upon how the supplier decides to package the tube for shipment.  It has been my experience that this is inconsistent and nearly impossible to predict.  Suppliers typically package based on what will be sufficient to protect the item in transit and what materials they happen to have on hand.  So, you might order from the same company 2 times and the shipping materials could be different.  I think this question can only be answered by the supplier during the actual order process.MECHANICAL   Maximum Overall Dimensions      Length  2 3/16 inches    Seated Height  1 15/16 inches    Diameter  7/8 inches

**Q: Would there be further volume reduction if I also replaced the second preamp tube?**
A: Since a 12AT7 has only 60% of the gain of a 12AX7 yes it would reduce preamp output and volume at that stage.

**Q: Do these work**
A: I have this in a Zenith C845 AM/FM radio for over six years and so far it has worked and held up just like an NOS 12AT7.  I have had no problems with it.

## Frequently Bought Together

- Electro-Harmonix 12AT7 EH Preamp Vacuum Tube, Single
- Electro-Harmonix 7025EH Vacuum Tube
- JJ Electronics Amplifier Tube (T-12AX7-S-JJ)

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*Product available on Desertcart Argentina*
*Store origin: AR*
*Last updated: 2026-05-07*