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
Tweaking the Rotel RA935BX amplifier
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="handsome" data-source="post: 800395" data-attributes="member: 772"><p>Diodes aren't "noisey" per se its their switching behavior. Normal diodes don't switch off immediately hence the "slow" moniker</p><p></p><p>"The reverse recovery time of a diode is the time it takes to stop conducting after being switched from forward to reverse biased. This is a issue with semiconductor diodes because any charges in the depletion region will continue to allow conduction even when reverse biased. It takes a finite amount of time to sweep out these charges."</p><p></p><p>This behavior resonates with the transformer leakage inductance and capacitance creating spikes containing lots of high frequency hash that ambles into your supposedly pristine power rails. High speed diodes are designed to switch (off) cleanly-ier and are touted as generating less hash as a result. UF4007 cost almost the same as 1N4007 (more useful for us valve orientated folk) the price differential is almost irrelevant but whatever you use you are buying only in small (4) quantities so using them it's a bit of a no-brainer.</p></blockquote><p></p>
[QUOTE="handsome, post: 800395, member: 772"] Diodes aren't "noisey" per se its their switching behavior. Normal diodes don't switch off immediately hence the "slow" moniker "The reverse recovery time of a diode is the time it takes to stop conducting after being switched from forward to reverse biased. This is a issue with semiconductor diodes because any charges in the depletion region will continue to allow conduction even when reverse biased. It takes a finite amount of time to sweep out these charges." This behavior resonates with the transformer leakage inductance and capacitance creating spikes containing lots of high frequency hash that ambles into your supposedly pristine power rails. High speed diodes are designed to switch (off) cleanly-ier and are touted as generating less hash as a result. UF4007 cost almost the same as 1N4007 (more useful for us valve orientated folk) the price differential is almost irrelevant but whatever you use you are buying only in small (4) quantities so using them it's a bit of a no-brainer. [/QUOTE]
Insert quotes…
Verification
Post reply
DIY & Tutorials
DIY For Audio
Tweaking the Rotel RA935BX amplifier
Top