Best. Analogy. Ever.øøøøøøø wrote: So basically, it's like we're turning a big "tone control" all the way down to filter out the unwanted signal, in this case 120Hz ripple voltage (and its harmonics).
Understanding power supply filters in your amp
-
Soochdaddy
- PAT. # 2.972.923
- Posts: 2389
- Joined: Wed May 30, 2007 9:47 pm
- Location: SoCal
Re: Understanding power supply filters in your amp
"I want to be able to purchase gin in bulk at Costco on a Sunday. So I totally voted." - chrisrnps
"Always socks on cocks-as to protect my low hanging guitar from getting 'cock rash' when playing in the nude, of course." - basique
"Always socks on cocks-as to protect my low hanging guitar from getting 'cock rash' when playing in the nude, of course." - basique
-
al30
- PAT. # 2.972.923
- Posts: 564
- Joined: Fri Mar 12, 2010 6:55 am
-
i love sharin foo
- Mods
- Posts: 5699
- Joined: Tue Sep 12, 2006 8:26 am
- Location: Pittsburgh, PA
- Contact:
Re: Understanding power supply filters in your amp
I've always wondered what exactly the filter caps did too. THanks a lot for the post. I am accumulating all the parts to build my first amp right now, so it's nice to gain a better understanding of what everything does before I get started.
This isn’t some kind of metaphor
Goddamn this is real
Goddamn this is real
-
OffYourFace
- Mods
- Posts: 14260
- Joined: Thu May 03, 2007 2:59 pm
- Location: Los Angeles, CA
-
46346
- PAT. # 2.972.923
- Posts: 2878
- Joined: Sun Feb 27, 2011 1:39 am
- Location: the Silver Echoes of L.A.
- Contact:
Re: Understanding power supply filters in your amp
dude! can we get you a grant or something so you can teach us amp electronics over OSG? i'm digging this!
well written - thanks!
well written - thanks!
Cat Museum, ACME, Malcolm Mooney, Dream Apes, The Cooling Time, Kind Hearts and Coronets, Quarks
-
jorri
- PAT. # 2.972.923
- Posts: 3050
- Joined: Thu May 07, 2009 1:53 am
- Location: bath, UK
- Contact:
Re: Understanding power supply filters in your amp
can anyone summarise what happens when caps leak electrolyte and old? I'm told they can start blowing fuses and become noisy, so is this just an intermittent short to ground and loss of capacitance?
Just replacing some big 4700uF caps and hoping that would resolve a fuse blowing problem. They are after the transformer, which might explain the huge difference in capacitance due to impedance, as well as only being 50V rated (although i then bought 100v anyway) as opposed to the usual 10-220uF 500V caps.
Playing around with values in my own pedal designs is pretty important. I do notice a certain undesirable tightness as high as 220uF and its not really making it darker in the same way as a signal path or emitter cap would.
Just replacing some big 4700uF caps and hoping that would resolve a fuse blowing problem. They are after the transformer, which might explain the huge difference in capacitance due to impedance, as well as only being 50V rated (although i then bought 100v anyway) as opposed to the usual 10-220uF 500V caps.
Playing around with values in my own pedal designs is pretty important. I do notice a certain undesirable tightness as high as 220uF and its not really making it darker in the same way as a signal path or emitter cap would.
-
DeathJag
- PAT. # 2.972.923
- Posts: 2297
- Joined: Wed Aug 08, 2018 11:44 am
Re: Understanding power supply filters in your amp
As someone who would eventually like to build amps -
Thanks a million, sir. That is awesome, just awesome. I’m gonna cut and paste the text for my “cheat sheet notes” to refer to in the future!
Thanks a million, sir. That is awesome, just awesome. I’m gonna cut and paste the text for my “cheat sheet notes” to refer to in the future!