Raytheon 6L6G Vintage Vacuum Tube Engraved Base Bottom Getter NOS (Test 101%)
| Plate Current (Ip) | Mutual Conductance (Gm) | Heater-Cathode Leakage | Gas | |
|---|---|---|---|---|
| Tube 1 | 68.1 mA (95%) | 6430 (107%) | 0.0 | 1.8 |
Here's some information that will help you interpret the test results!
How do you calculate the percentage shown in the title? This is the average of all test results. This percentage provides a quick comparison to NOS specification.
What is Plate Current (IP)? This is the actual plate current, measured in milliamps (mA). Most people agree that this is the more important measurement when matching power tubes (6V6, EL34, 6L6, 6550, etc). For easy interpretation, we also give you a percentage of the measurement compared to NOS specification.
What is Mutual Cond (Gm)? This is the actual mutual conductance, also known as transconductance. Most people agree that this measurement is more important when matching preamp tubes (12AX7, 6DJ8, 6SN7, etc). For easy interpretation, we also give you a percentage of the measurement compared to NOS specification.
What is Heater-Cathode Leakage? This number should almost always be 0.0. This is particularly critical in preamp tubes (12AX7, 6DJ8, 6SN7, etc), as even the smallest measurement can lead to noise and/or poor performance. This is a test you won't get from vintage testers, at least not with any precision.
What is Gas? This scale ranges from 0.0 to 999.9. It is critical for preamp tubes to have a low test result (less than 0.4 is perfectly fine). Larger power tubes (6V6, EL34, 6L6, 6550, etc) normally show levels as high as 15.0, which is normal given the high temperatures and surface area within the tube. This is a test you won't get from vintage testers, at least not with any precision.
Here's why you should buy your tubes from us!
- We use the most advanced and accurate tester available, the Amplitrex AT1000. This piece of equipment runs tests that vintage testers cannot, ensuring you get a full picture of the tube you're buying. This includes a "noise test" that tests for microphonics!
- We screen each tube for potential issues (faded getter flashing, loose particles in envelope, over-heated plates, etc)
- We offer 30-day returns on all tubes!
- We combine shipping for free, meaning your entire domestic order ships for just $4.90 via USPS First Class. We combine purchases for International buyers as well.
- We've been selling tubes and electronics on eBay for over ten years, and average 99.9-100% positive feedback! To learn more about us, visit our website by clicking here.
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We use the Amplitrex AT1000 as our primary tube tester here at the shop. We do this because it is the most advanced and accurate tube tester available. We use this piece of equipment to measure the following: mutual conductance, plate current, the presence of unwanted gas, heater-to-cathode leakage, and shorts. Further, we only used fixed bias to ensure test results you can trust. To learn more about this advanced tube tester, click here.
Your satisfaction is our first priority, and with this in mind we offer returns on all of our items. However, we ask that before opening a return, you follow some simple steps:
- Read the entire description.
- Ask any questions you might have before bidding or buying an item.
- If upon receiving your item, you have questions or feel that it is not as described, please contact us before initiating a return. More often than not, we can resolve the issue without having return the item. Our contact info can be found here.
Following these three steps will help save both time and money for everyone involved. Thank you in advance for your understanding and cooperation!
We are located in Sparks, Nevada, and our warehouse is open to the public during normal business hours. If you ever find yourself in Northern Nevada, we welcome you to stop by and check out the shop! For more information, click here.
 The Global Shipping Program makes it easier for buyers in some countries outside the US and UK to purchase our items. The US or UK seller ships the item to a local global shipping provider, and the global shipping provider ships the item to you. When you purchase an item through the Global Shipping Program:
|  USPS Priority Mail offers affordable shipping to over 180 countries. If you are buying multiple items, we can use this option to combine shipping for a reduced cost. If you have any questions regarding combined shipping, please ask before bidding/buying. If you select USPS Priority Mail, please be aware of the following:
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