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
Pioneer SA-400 Valve Amp Repair
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="Ampdog" data-source="post: 842715" data-attributes="member: 144"><p>I may have been somewhat misunderstood: I meant 4 x ECL82 etc. for a <em>stereo</em> amplifier.</p><p></p><p>Then one must just remember that figures listed in valve manuals are for the valves only, viz. at the vanve anodes.The output transformer efficiency must still be taken into account. (Because of the variety of OPTs on the market valve data cannot include that.) This usually about 85% to 90% for typical transformers in that class.</p><p></p><p>10,5W would thus configure to some 8 - 8.5W at the loudspeaker terminals. Also, this is with an ideal power supply (no 'sag' at maximum output).</p></blockquote><p></p>
[QUOTE="Ampdog, post: 842715, member: 144"] I may have been somewhat misunderstood: I meant 4 x ECL82 etc. for a [i]stereo[/i] amplifier. Then one must just remember that figures listed in valve manuals are for the valves only, viz. at the vanve anodes.The output transformer efficiency must still be taken into account. (Because of the variety of OPTs on the market valve data cannot include that.) This usually about 85% to 90% for typical transformers in that class. 10,5W would thus configure to some 8 - 8.5W at the loudspeaker terminals. Also, this is with an ideal power supply (no 'sag' at maximum output). [/QUOTE]
Insert quotes…
Verification
Post reply
Audio and Video Talk
Valves / Vacuum Tubes
Pioneer SA-400 Valve Amp Repair
Top