This is wat I'm going to use:
The inductors are 1,4mm if I'm not mistaken.
I'm switching over to a tube hybrid designed by Kristjian.
I'll be updating my Zen website I made today.
Kristjian's website could be a good source for some extra information, but most of the info is on www.passdiy.com
An externally hosted image should be here but it was not working when we last tested it.
The inductors are 1,4mm if I'm not mistaken.
I'm switching over to a tube hybrid designed by Kristjian.
I'll be updating my Zen website I made today.
Kristjian's website could be a good source for some extra information, but most of the info is on www.passdiy.com
Hi,
In my ZenV4 I just have a single 20000uF electrolytic and then it goes directly to regulation. I am using 53V on the unregulated, after rectification. With this setup the amp is dead quiet, no hum at all.
In my ZenV4 I just have a single 20000uF electrolytic and then it goes directly to regulation. I am using 53V on the unregulated, after rectification. With this setup the amp is dead quiet, no hum at all.
Ok!
Somebody tell me that it is good to but a 0,1uF capasitor on each diode of the bridge!
If I do that, I don't have to put the 1uF/MKP at the enter and at the output of the power supplie?
Somebody tell me that it is good to but a 0,1uF capasitor on each diode of the bridge!
If I do that, I don't have to put the 1uF/MKP at the enter and at the output of the power supplie?
Arold,
The caps you are talking about are called snubber caps. They "buffer" sharp current swings going through the bridge rectifier, like when you turn the amp on. They also provide some quieting to the rectifiers which can be noisy. IMO, they are optional when dealing with amps less 50 watts as there are smaller swings and less filter capacitance. You can save a few bucks and just use the 1uF mylar caps shown in Tazzy's diagram. Many people say that you get more high freq detail when you use multiple electrolytic caps (4 or more) in a "bank" for filter capacitance. I do heartily recommend a poly or mylar 1uf cap after the electrolytics (also shown in the diagram). This will smooth out the sound of your amp. Especially if you use lower quality electrolytics for your filtering.
The caps you are talking about are called snubber caps. They "buffer" sharp current swings going through the bridge rectifier, like when you turn the amp on. They also provide some quieting to the rectifiers which can be noisy. IMO, they are optional when dealing with amps less 50 watts as there are smaller swings and less filter capacitance. You can save a few bucks and just use the 1uF mylar caps shown in Tazzy's diagram. Many people say that you get more high freq detail when you use multiple electrolytic caps (4 or more) in a "bank" for filter capacitance. I do heartily recommend a poly or mylar 1uf cap after the electrolytics (also shown in the diagram). This will smooth out the sound of your amp. Especially if you use lower quality electrolytics for your filtering.
Where can I find a poly or mylar 1uF capasitor on the digikey catalogue! I tried to find without succes????
EF1105-ND is the part # for 1uf
Panasonic Miniaturized Metallized Polyester Film Capacitors
the 10uf part is used in the Zen V4
just look at the parts list
that's on the passdiy.com page.
of course you can also check out
www.partsconnexion.com/
for other examples
Panasonic Miniaturized Metallized Polyester Film Capacitors
the 10uf part is used in the Zen V4
just look at the parts list
that's on the passdiy.com page.
of course you can also check out
www.partsconnexion.com/
for other examples
It is good for the output capasitor but on the plan of the Zen V4 power supply, I see a 0,1 uF capasitor on the AV voltage, what I do with that ???
it's a filter capacitor placed across the line to reduce noise.
it should be a high voltage AC line rated cap.
it should be a high voltage AC line rated cap.
The cap doesn't have to be AC rated just high enough DC rated. The rule of thumb passed around here on the forum has been at least twice the voltage it will see, ie 120VAC choose a 250VDC rated cap or higher. Most people use 400VDC or 600VDC before the primaries and 250VDC after. Try to keep it in reason as this keeps your cost down and saves valuable space.
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