Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Registered members
Current visitors
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Audio and Video Talk
Valves / Vacuum Tubes
Valve/Tube Tester: Easy to build, DIY low cost !
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support AVForums:
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="gavinbirss" data-source="post: 926414" data-attributes="member: 60"><p>I have seen examples of 300B tubes from Golden Lion being compared to Shuguang tubes and the emissions being quite different in what I assume are tube data sheet test conditions and the Gold Lions being much lower than expected.</p><p></p><p>Further the factory printed test values are similar in emissions but were actually tested under other conditions. </p><p></p><p>Question is what does this say about real life performance?</p><p>It now depends on the the circuit and surrounding components, load and power usage/bias. </p><p></p><p>So the test numbers may sway you to thinking one is "better" but are they actually?</p><p></p><p>Secondly how long does a typical tube tester have the tube in the tester. Until it shows good or until it is properly warmed up.</p></blockquote><p></p>
[QUOTE="gavinbirss, post: 926414, member: 60"] I have seen examples of 300B tubes from Golden Lion being compared to Shuguang tubes and the emissions being quite different in what I assume are tube data sheet test conditions and the Gold Lions being much lower than expected. Further the factory printed test values are similar in emissions but were actually tested under other conditions. Question is what does this say about real life performance? It now depends on the the circuit and surrounding components, load and power usage/bias. So the test numbers may sway you to thinking one is "better" but are they actually? Secondly how long does a typical tube tester have the tube in the tester. Until it shows good or until it is properly warmed up. [/QUOTE]
Insert quotes…
Verification
Post reply
Audio and Video Talk
Valves / Vacuum Tubes
Valve/Tube Tester: Easy to build, DIY low cost !
Top