What kind of rectifier diode is this?
- chris_d
- Solder Soldier
It is in a Zenith FM tuner that i took apart a while back. I am looking to use the PT from it for a tube preamp, and trying to figure what the PT's ratings are roughly, B+ wise.
What kind of diode is this? Can i assume that it has the same voltage drop characteristics as a more "normal" silicon setup like with 1N4001s/1N4007s?
Any information would be appreciated.
Thanks!
-chris
- analogguru
- Old Solderhand
Information
If we are talking about the green one, this is a selenium-rectifier.
smells bestialic if overloaded....
analogguru
smells bestialic if overloaded....
analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
- chris_d
- Solder Soldier
Thanks! Do you know what the voltage drop characteristics are for one of these, compared with a silicon diode?analogguru wrote:If we are talking about the green one, this is a selenium-rectifier.
smells bestialic if overloaded....
analogguru
I have only a very low quality schematic for this, and it is difficult to read the voltages that are listed. It appears to be showing 130v after this selenium diode. Could it be assumed that the PT was providing roughly 90vac? Or is the drop different in the case of these diodes?
-chris
- KHELSTROM
- Solder Soldier
Not only dose it smell bad when it fails, the vapors it releases upon failure are toxic! Stay away from these!analogguru wrote:If we are talking about the green one, this is a selenium-rectifier.
smells bestialic if overloaded....
analogguru
- chris_d
- Solder Soldier
Thanks, I have no intention of using the selenium rectifier for anything, but i am trying to determine the specs of the PT that was attached to it. Are its voltage characteristics the same as those for silicon diodes?KHELSTROM wrote:Not only dose it smell bad when it fails, the vapors it releases upon failure are toxic! Stay away from these!analogguru wrote:If we are talking about the green one, this is a selenium-rectifier.
smells bestialic if overloaded....
analogguru
-chris
- analogguru
- Old Solderhand
Information
A google search will show up this results:
http://en.wikipedia.org/wiki/Metal_rectifier
http://209.85.129.104/search?q=cache:vg ... d=74&gl=at
http://yarchive.net/electr/selenium_rectifiers.html
http://www.freepatentsonline.com/3694908.html
http://www.angelfire.com/ma2/AdamVon/resto1.html
analogguru
http://en.wikipedia.org/wiki/Metal_rectifier
http://209.85.129.104/search?q=cache:vg ... d=74&gl=at
http://yarchive.net/electr/selenium_rectifiers.html
http://www.freepatentsonline.com/3694908.html
http://www.angelfire.com/ma2/AdamVon/resto1.html
analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
- chris_d
- Solder Soldier
Thanks! For some reason my google searches didn't lead me to any of those pages!analogguru wrote:A google search will show up this results:
http://en.wikipedia.org/wiki/Metal_rectifier
http://209.85.129.104/search?q=cache:vg ... d=74&gl=at
http://yarchive.net/electr/selenium_rectifiers.html
http://www.freepatentsonline.com/3694908.html
http://www.angelfire.com/ma2/AdamVon/resto1.html
analogguru
So i should expect more voltage out of this PT with a silicon rectifier. Good!
Thanks again!
-chris
- analogguru
- Old Solderhand
Information
The curve is much smoother than silizium.
So replace this rectifier with si-diodes and use the selenium for the next toobscreamer/distortion+ variation.
but keep this secret..... bootweakers could steal this idea for the selenium-overdrive.
analogguru
So replace this rectifier with si-diodes and use the selenium for the next toobscreamer/distortion+ variation.
but keep this secret..... bootweakers could steal this idea for the selenium-overdrive.
analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.