Im going to Go foreward and wire it up later anyway, and apply a small AC voltage just to test. and insulate diodes of corse!
The only thing I need to actualy know is if the ground Points in that schematic go to Chassis, or if only the ground from IEC socket goes to Chassis.
The only thing I need to actualy know is if the ground Points in that schematic go to Chassis, or if only the ground from IEC socket goes to Chassis.
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You are using a single Graetz/bridge. Many are using dual Graetz. Yours will work fine if wired properly, but will not give same performance as dual bridge. F5 Manual, pg 18, has dual bridge setup.
http://www.firstwatt.com/pdf/prod_f5_man.pdf
From Pearl II article, by Wayne Colbourn
"First, there are two rectifier bridges instead of the usual one. We do this because the positive rail will be sourcing more current to the circuit than the negative, and in this circumstance dual rectifiers will avoid the transformer noise which often accompanies this."
IEC oulet goes directly to chassis and psu is connected to earth/chassis through a thermistor/bridge combo, which lifts that point a diode drop above ground to further help with noise.
http://www.firstwatt.com/pdf/prod_f5_man.pdf
From Pearl II article, by Wayne Colbourn
"First, there are two rectifier bridges instead of the usual one. We do this because the positive rail will be sourcing more current to the circuit than the negative, and in this circumstance dual rectifiers will avoid the transformer noise which often accompanies this."
IEC oulet goes directly to chassis and psu is connected to earth/chassis through a thermistor/bridge combo, which lifts that point a diode drop above ground to further help with noise.
THats how we learn, one little bit at a time. Sooner or later, we might actually know something, although I have not arrived at that point yet😀 Still close my eyes when I plug in my amps.
Ok I like your attitude, i figured 2 diodes was equal to 1 Graetz and im using 4.
but yes page 11 of www.firstwatt.com/pdf/art_f5_turbo.pdf I have copied Exactly. But I may Swap to using the 2x 200v 35A, bridge rectifiers I have Or order another 4 Diodes to make dual Graetz.
But let me clarify lol, That page 11 is showing 4 actual Diodes ?
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Yes. But many thought that it seemed odd that he stepped back from dual Graetz in F5 to a single, in what was a more powerful amp. He has been known to cut and paste his articles. As i said, if you wired properly for single bridge, then you are fine. You may find that the traces on the veraboard are being pushed a little in this instance, but should be ok for short term solution.
In the medical field on this side, one needs to learn loads of Latin(Greek) names for anatomy & physiology.
Across the pond(s), many of those words are integral parts of the American/English language.
Lose a little, gain a little.
(Graetz is the standard on these shores. Think Zzz likes Graetz more, than other way round)
Thanks for your help 🙂 I agree that is a bit odd, i had just figured those MUR were more powerful originally but now I see. But never expected the amp to pull more from the positive side than the negative as you would have thought it would be symmetrical but I guess we are not talking logic here lol
The veraboard i have doubled up using a few tracks as one but may add wire to thicken connections OR. Buy the official Diyaudio Power supply boards, If i can get 20 caps on 2 of them! they do look rather well done.
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the difference between Diode bridge/rectifier and Greatz is as big as between
swedes and turnips lol
It is unfortunate that latin is no longer encouraged here, as it once was. Been replaced by other more "practical" languages. I of all people get the Zzz part.
I tihnk you will find true symmetry very logical, but also very rare. You seem to have everything sorted. Plug it in and go for it.
Im aiming for long term solution too, so perhaps out with the Vero board. although don't see why It wouldnt be able to handle it using 3 tracks at once.
It is a good point how good are those copper strips?!
It is a good point how good are those copper strips?!
Perhaps ZM or Jacco would like to help clarify the usefulness of dual Graetz in a PSU, even in symmetrical designs like the F5T.
I can answer that one, after a conversation I had with Wayne at Burning Amp -
Simply the dual bridges help keep the mechanical noise lower in the transformer if there is an asymmetrical pull on the load.
But I would like to hear it from someone who actually understands what's going on, rater than me just parroting it. 🙂
Simply the dual bridges help keep the mechanical noise lower in the transformer if there is an asymmetrical pull on the load.
But I would like to hear it from someone who actually understands what's going on, rater than me just parroting it. 🙂
Is it possible for the F5, or any other amp, for that matter, to create an assymmetrical pull on the transformer?