BYV series diode

[Moby]

The diodes are ultrafast rectifiers, with a 15-25ns recovery time. My question is, is it any good for audio PSU :roll: Or, is it any better for audio than 1n types?

 

[SonsOfThunder]

I think it would depend on how well the given circuit rejects noise from the power supply.

Some simple tests with a scope should reveal any diffs.

HTH!

 

[Moby]

Yes, BYV should be very good for rejecting spikes and switching disturbances based on the recovery time. I was thinking about using them in Gretz configuration, but I would like to hear what you guys think about?

 

[Moby]

Ha! I found this! Tekay, did you tested BYV in the real world?

http://www.vintagedesign.se/diy/Uni%20PSU.pdf

 

[SonsOfThunder]

Moby,

>>>Gretz configuration

What is this?

I meant to say that the effectiveness of those diodes and the reduced switching noise would be of benefit if the audio circuit they are connected to have poor PSRR.

HTH!
Charlie

 

[Moby]

[quote author="SonsOfThunder"]Moby,

>>>Gretz configuration

What is this?

I meant to say that the effectiveness of those diodes and the reduced switching noise would be of benefit if the audio circuit they are connected to have poor PSRR.

HTH!
Charlie[/quote]
bridge connection or Gretz

 

[SonsOfThunder]

"Gretz" is a new term for me. I never heard that one before.

Thanks!

 

[Sorr]

I have been using these diodes for years in H.T power supplies with good results.

Sorr

 

[Moby]

[quote author="Sorr"]I have been using these diodes for years in H.T power supplies with good results.

Sorr[/quote]
That's good news. I presume that +/-18v will act great too. I was thinking about BYV27-200 :roll:

 

[Moby]

[quote author="SonsOfThunder"]"Gretz" is a new term for me. I never heard that one before.

Thanks![/quote]
Actually it's "Graetz" known as the Graetz circuit after its inventor, the physicist Leo Graetz.

 

[Tekay]

I've been using BYV27 in all my 19" PSU. What ever you do! Never put caps over them as you can do with standard 1Nxxxx, it will increase the spikes :?

 

[Moby]

Thanks Thomas. It's great you told me that because It's not too late to change my PCB. Really weird diode behavior BTW..... :? What about resistors around?
Also, did you find any improvements with BYV compared to 1n's

 

[bcarso]

[quote author="Tekay"]I've been using BYV27 in all my 19" PSU. What ever you do! Never put caps over them as you can do with standard 1Nxxxx, it will increase the spikes :?[/quote]

Are you sure they are not just lowering the frequency components of the ringing to make them easier to see on limited-bandwidth instrumentation?

Typically, caps across diodes merely reduce the high frequency content, but do not reduce the net energy in the reverse recovery spikes by much at all. More complicated networks do, but for our purposes the system improvement is usually from the reduction in the propensity to radiate, hence caps are usually sufficient.

The other downside of caps is that they allow more high frequency energy from the line to propagate through, so by themselves they are a mixed blessing.