---
product_id: 340940919
title: "Bias Probe for Octal Base Power Tubes."
brand: "eurotubes"
price: "£108.36"
currency: GBP
in_stock: true
url: https://www.desertcart.co.uk/products/340940919-bias-probe-for-octal-base-power-tubes
store_origin: GB
region: United Kingdom
---

# Bias Probe for Octal Base Power Tubes.

**Brand:** eurotubes
**Price:** £108.36
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** Bias Probe for Octal Base Power Tubes. by eurotubes
- **How much does it cost?** £108.36 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/340940919-bias-probe-for-octal-base-power-tubes)

## Best For

- eurotubes enthusiasts

## Why This Product

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

## Description

Bias Probe for Octal Base Power Tubes.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Eurotubes |
| Power Source | Battery Powered |
| Colour | Black |
| Item Weight | 9 g |
| Min. Operating Voltage | 6 Volts |
| Specification Met | CE |
| Measurement Type | Multimeter |
| Manufacturer | Eurotubes Inc. |
| Item Weight | 9.07 g |
| Item model number | Eurotubes Octal Bias Probe |
| Item Weight | 9.07 g |
| Country of Origin | USA |

## Product Details

- **Brand:** Eurotubes
- **Power Source:** Battery Powered
- **Colour:** Black
- **Item Weight:** 9 g
- **Min. Operating Voltage:** 6 Volts

## Images

![Bias Probe for Octal Base Power Tubes. - Image 1](https://m.media-amazon.com/images/I/71nlOkb8YoL.jpg)

## Questions & Answers

**Q: how do you use this?  my amp has no bias pots only can be bias from underneath the amp.  will this work**
A: Our bias probe allows you to monitor the idle bias point (plate current) of your power tubes. The bias point itself can only be adjusted by the bias adjustment trimmer built into the amp. If the bias adjustment trimmer is internal the amp will still need to be taken apart to access it (which is quite common). Thanks,EddieEurotubes503-659-7401

**Q: Will this work for my '65 Deluxe Reverb Reissue?**
A: Yes, our octal bias probe would work great with your '65 Deluxe Reverb Reissue. Don't hesitate to contact us directly if you need additional info. Thanks, ET

**Q: I use to have these years ago for my deluxe reverb is it true that I can measure the plate voltage with these**
A: No, our basic bias probe cannot be used to measure plate voltage. Please checkout or Pro One if you need this functionality: https://www.amazon.com/Eurotubes-Probe-Octal-Power-Tubes/dp/B01A7IKTA0/ref=sr_1_1?ie=UTF8&qid=1524269945&sr=8-1&keywords=eurotubes+pro+one

Thanks,
Eddie/Eurotubes

**Q: will the work with the 7591a tube?**
A: Yes, this bias probe head will work 7591A's. Don't hesitate to contact us directly if you would like more info. Thanks, Eurotubes

## Frequently Bought Together

- Eurotubes Bias Probe for Octal Base Power Tubes.
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**Shop now:** [https://www.desertcart.co.uk/products/340940919-bias-probe-for-octal-base-power-tubes](https://www.desertcart.co.uk/products/340940919-bias-probe-for-octal-base-power-tubes)

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-18*