Tube Screamer diodes

Zben3129 · November 22, 2007, 01:35:12 AM

If i use led's as the diodes in the feedback loop for the ts808 should they light up??? thanks

BrianJ · November 22, 2007, 01:58:53 AM

Mine have in the past. I wouldn't worry.

petemoore · November 22, 2007, 02:17:09 AM

Yes they should !!
I didn't think a FB loop in a TS produced a V potential to light up an LED though.
If it looks good and sound great, A/B it, or just use it.

Zben3129 · November 22, 2007, 11:50:26 AM

also, I have the 3rd diode on a switch, and when i play i hear no audible dirfference when i switch in or out the diode, is this normal, or is it possible that the overdrive i'm getting is from the opamp alone

beatstrat · November 22, 2007, 01:11:34 PM

Shouldn't they only light if they are going to ground (not in FB loop)?

Mark Hammer · November 22, 2007, 01:16:08 PM

They should light up if there is enough current to make them do so. Some LEDs need more current to produce visible light, some less. Many are perfectly capable of doing exactly what we need them to do with respect to clipping without ever giving off more than a few photons when we weren't looking.

Electric_Death · November 22, 2007, 04:59:38 PM

Yeah the easy answer here is, what is their rated MCD output?

If it's low, they'll clip abruptly at lower levels and light up.
If it's high, they'll need more signal pushed through them to get them to clip and light up aaaand, if their output is that highly rated they won't light up at all in some circuits.

Also, color plays a huge factor here as well for some reason. Some clear greens are hard to get to light up and clip VERY aggressively. Total sustain killers unless you have a really high output circuit. They give a pretty harsh sound but, plenty of distortion in a high gain circuit that can properly push through them.
So, color matters as well. I have some reds that are higher output than the greens but they reds are easier going when it comes to signal clipping.

Idiot · November 22, 2007, 07:03:00 PM

The only great TS are two stacked

Zben3129 · November 22, 2007, 08:39:44 PM

?? sorry for my ignorance but what do you mean by this

Idiot · November 23, 2007, 05:22:15 PM

one overdriving another.req 2 of them

Zben3129 · November 23, 2007, 05:26:16 PM

two ts808s or 2 opamps stacked

Electric_Death · November 24, 2007, 03:36:38 AM

Quote from: Idiot on November 23, 2007, 05:22:15 PM
one overdriving another.req 2 of them

Try the TS7.
Heaps of gain and the resonance peaks result in a nice frequency intermodulation effect.

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Tube Screamer diodes