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
DIY & Tutorials
DIY For Audio
Valves in series vs in parallel
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="fredeb" data-source="post: 1100750" data-attributes="member: 13623"><p>Use the 18V 2.5A transformer , adj to 13V without tubes . Insert all tubes and now adjust again .</p><p></p><p>From your description I understood that you did not try adjusting after tubes are installed . 20A SMPS doesn't budge because 450mA is such a small percentage of 20A , not so with 2.5A trafo . Remember also that some current and voltage is used and lost by the PSU circuit .</p><p></p><p>Show us some pics of your transformers . </p><p></p><p></p><p>Other regulator option <a href="https://www.mantech.co.za/ProductInfo.aspx?Item=82M0894" target="_blank">https://www.mantech.co.za/ProductInfo.aspx?Item=82M0894</a> LM2576 is more efficient , offers higher current output .</p><p></p><p>https://www.mantech.co.za/Datasheets/Products/LM2576-ON.pdf</p></blockquote><p></p>
[QUOTE="fredeb, post: 1100750, member: 13623"] Use the 18V 2.5A transformer , adj to 13V without tubes . Insert all tubes and now adjust again . From your description I understood that you did not try adjusting after tubes are installed . 20A SMPS doesn't budge because 450mA is such a small percentage of 20A , not so with 2.5A trafo . Remember also that some current and voltage is used and lost by the PSU circuit . Show us some pics of your transformers . Other regulator option [url=https://www.mantech.co.za/ProductInfo.aspx?Item=82M0894]https://www.mantech.co.za/ProductInfo.aspx?Item=82M0894[/url] LM2576 is more efficient , offers higher current output . https://www.mantech.co.za/Datasheets/Products/LM2576-ON.pdf [/QUOTE]
Insert quotes…
Verification
Post reply
DIY & Tutorials
DIY For Audio
Valves in series vs in parallel
Top