Rectifier Diodes UF4007 vs 1N5408 Clips

rgalpin · Post by **rgalpin** » Tue Oct 23, 2007 8:53 pm

Rectifier: UF4007, Bias: UF4007
http://www.soundclick.com/bands/songInf ... ID=5901270
wDrums
http://www.soundclick.com/bands/songInf ... ID=5903109

Rectifier: 1N5408, Bias: UF4007
http://www.soundclick.com/bands/songInf ... ID=5901296
wDrums
http://www.soundclick.com/bands/songInf ... ID=5903102

Rectifier: 1N5408, Bias: 1N5408
http://www.soundclick.com/bands/songInf ... ID=5901323
wDrums
http://www.soundclick.com/bands/songInf ... ID=5903107

Plexi circuit -> Weber Attenuator on 4 -> 1x12 Weber Pre-Rola Treatment

After hearing the difference between the various diodes i had tried so far - i had to go back and see how the slower ones sounded again.

what do you think?
Coke or Pepsi? Mac or PC? Leno or Letterman? VHS or BETA?

toner · Post by **toner** » Tue Oct 23, 2007 9:17 pm

I have a better question. How did you get each clip to be exactly 333,949 bytes?

My vote:
Rectifier: UF4007, Bias: UF4007

I like the compression or "squash" in that clip.

Mac or PC? Linux

rgalpin · Post by **rgalpin** » Tue Oct 23, 2007 10:00 pm

toner wrote:I have a better question. How did you get each clip to be exactly 333,949 bytes?

i played the clips against a drum track to keep the timing the same - then i used the same chunk of timeline in each export - funny though if they were exactly the same. bizarre. one more little vibrato and one would have been 333,950? hmmm.. maybe that says more about how PT/SoundForge/SoundClick compress the clips.

i guess. weird and wild.

toner · Post by **toner** » Tue Oct 23, 2007 10:16 pm

I thought something like that might be going on.

I also noticed a sound difference between playing the embeded clips via soundclick and the downloaded mp3's. Damn digital crap!

After all of this, you'll have to start a diode company like SoZo did with caps!

rgalpin · Post by **rgalpin** » Wed Oct 24, 2007 11:51 am

i did these with bass and drums to hear them "in context" - i think this is so daggone interesting and i don't know why - these diodes are a component that really makes a big difference and it surprises me - and i just can't decide whether i like the smooth or the nasty.

fast - fast
UF4007rect_UF4007bias_wDrums
http://www.soundclick.com/bands/songInf ... ID=5903109

slow - fast
1N5408rect_UF4007bias_wDrums
http://www.soundclick.com/bands/songInf ... ID=5903102

slow - slow
1N5408rect_1N5408bias_wDrums
http://www.soundclick.com/bands/songInf ... ID=5903107

rgalpin · Post by **rgalpin** » Thu Oct 25, 2007 1:05 pm

i was hoping to get some more input on what you all hear but...
[singing] do you hear what i hear, do you hear what i hear...[/singing]

my ear says, slower is better. especially in the context of a full mix - the smoothness of the fast diodes doesn't let the guitar cut through.

RACKSYSTEMS was right about putting a fast diode on the bias only to lessen the effect.

i got interested in this after playing a friends vox AC30 with a tube rectifier. the fast diodes do more closely imtitate the sound of a tube rectifier in their stability and smoothness. i may try them in my JTM100 since it's the same pre amp circuit as the JTM45 that has the tube rectifier - and i use it for a power amp so the added stbility may work better in that part of the chain.

cheerz!

novosibir · Post by **novosibir** » Fri Oct 26, 2007 11:34 am

Well, I've been two days too busy, to watch the forum at all - but here I'm back again

Not much difference between the three clips, although I think, that I like the one w/ UF5408 everywhere best, because this clip does have the most lo chunk and punch. OTOH the clip w/ UF4007 everywhere has a nice compression, what isn't so much with the UF5408's - not easy to decide concretely.

Larry

GUITARmole · Post by **GUITARmole** » Wed Nov 07, 2007 1:41 am

...now you've got me wondering what those metal case diodes in the Metro store sound like

I liked the all 1N5408 clip the best until I heard the drum track clip in which I liked the exact opposite (all UF4007)...now I'm confused

rockgod212 · Post by **rockgod212** » Fri Aug 30, 2013 1:35 am

just came across this, and i was wondering what you settled on, which did you use or like the best?
i think i like the 1n5408's with the uf4007 in the bias, getting ready to change mine soon.
thanx for the clips and info.

rgalpin wrote:Rectifier: UF4007, Bias: UF4007
http://www.soundclick.com/bands/songInf" onclick="window.open(this.href);return false; ... ID=5901270
wDrums
http://www.soundclick.com/bands/songInf" onclick="window.open(this.href);return false; ... ID=5903109

Rectifier: 1N5408, Bias: UF4007
http://www.soundclick.com/bands/songInf" onclick="window.open(this.href);return false; ... ID=5901296
wDrums
http://www.soundclick.com/bands/songInf" onclick="window.open(this.href);return false; ... ID=5903102

Rectifier: 1N5408, Bias: 1N5408
http://www.soundclick.com/bands/songInf" onclick="window.open(this.href);return false; ... ID=5901323
wDrums
http://www.soundclick.com/bands/songInf" onclick="window.open(this.href);return false; ... ID=5903107

Plexi circuit -> Weber Attenuator on 4 -> 1x12 Weber Pre-Rola Treatment

After hearing the difference between the various diodes i had tried so far - i had to go back and see how the slower ones sounded again.

what do you think?
Coke or Pepsi? Mac or PC? Leno or Letterman? VHS or BETA?

rgalpin · Post by **rgalpin** » Fri Aug 30, 2013 10:17 am

rockgod212 wrote:just came across this, and i was wondering what you settled on, which did you use or like the best?
i think i like the 1n5408's with the uf4007 in the bias, getting ready to change mine soon.
thanx for the clips and info.

i tried so many variations and the markings on the diodes are so hard to decipher that i don't even know what i currently have in my amp. all i know is that the faster diodes sounded so steady that they almost felt like solid state which i didn't like. i need to see a diagram (illustration of the board) that shows the diodes and indicates which is for bias and which for rectifier. anybody have that info and could share would help. thanks.

john l · Post by **john l** » Sat Aug 31, 2013 12:01 pm

I just got done swapping 1n4007 to uf4007s and it made things too smooth, going to try 5408s today.

john l · Post by **john l** » Sat Aug 31, 2013 2:54 pm

yeah 5403s are staying. Interesting what a difference the choice of diodes makes in the in the grand scheme...

HTH · Post by **HTH** » Sat Aug 31, 2013 3:21 pm

It was the top end snap in the notes that I noticed most - surprising that the rectifier diodes make such a notable difference.

Mind, I'm not sure if the difference couldn't be changed either way by adjusting the EQ.

john l · Post by **john l** » Sat Aug 31, 2013 6:33 pm

I couldn't adjust it out. I can see where these would appeal to a lot of guys though.

rockgod212 · Post by **rockgod212** » Sat Aug 31, 2013 7:12 pm

i ended up using 1n5408's and uf4007 for bias in my metro 2203/afd 36, i biased up some kt77's an oh my god do i have an amp now, absolutely killer tone, it just has this snarl to it now, much more aggressive.........love it.

Metropoulos Forum

Rectifier Diodes UF4007 vs 1N5408 Clips

Rectifier Diodes UF4007 vs 1N5408 Clips

Re: Rectifier Diodes UF4007 vs 1N5408 Clips

Re: Rectifier Diodes UF4007 vs 1N5408 Clips

Re: Rectifier Diodes UF4007 vs 1N5408 Clips

Re: Rectifier Diodes UF4007 vs 1N5408 Clips

Re: Rectifier Diodes UF4007 vs 1N5408 Clips

Re: Rectifier Diodes UF4007 vs 1N5408 Clips

Re: Rectifier Diodes UF4007 vs 1N5408 Clips