| Author | Message | ||
     LongFrost |
Has any one had success messing with the clipping section of a 2165RD? I think the cipping is created with the two 1n914 diodes. Has any one tried using three(2+1) to change the clipping symetry? This is a common mod in stompboxes. | ||
| michael kaus |
I'm not real familiar with the rd's but some people(myself included) use LED's also in place of regular diodes. Also, you might try slapping a cap across one of the LED's if you try that. Try a .047mF around the LED. That's one of the mods I did to my bd-1 pedal and it DOES clean up the harmonics. Let me know if you try this in your amp-that's kind of an interesting thing to try. Mike. | ||
| Beau F. |
I wanted to try this on my HD-150 too but I am unclear on the cap part. Are you running the cap just from 1 lead of one of the LED's to the other lead of the same LED? When I heard about this before I thought that it was across from 1 LED to the other. (I am not sure if that straight across or diagonally) Am I offbase on this or does it make a difference? Thank you, Beau | ||
| michael kaus |
The cap is across the two leads of the same LED-in other words, it's in parallel with the one LED. Never tried it from one LED to another but would assume you would end up with just less clipping as it would be shunting the clipped signal from one side to another. Not really sur what THAT would effect. Mike. | ||
| Peter Maziar (mosfet) Username: mosfet Registered: 11-2006 |
I am thinking about putting clipping LEDs into my HD-150 instead of 1N914 diodess, and am wondering what the resistor values need to be to keep the clipping threshold relatively the same as with the diodes?  | ||
| Peter Maziar (mosfet) Username: mosfet Registered: 11-2006 |
I am thinking about putting clipping LEDs into my HD-150 instead of 1N914s, and am wondering what the resistor values need to be to keep the clipping threshold relatively the same as with the diodes? | ||
| Ed Goforth (ed_goforth) Username: ed_goforth Registered: 06-2006 |
I found out that with the LED's the overdrive is less intense, warmer sounding than the 914 or 4148 type diodes (the 914/4148 clip harder and sooner), but if you like a briter clip the 914/4148's are good. maybe put another pair in series with whats there for a less grainy clip. The LED tends to be smoother and compresses more before clipping and has a bit more headroom depending on its voltage rating. Changing the resistors would change the gain structure. | ||
| Ed Goforth (ed_goforth) Username: ed_goforth Registered: 06-2006 |
By putting a cap across the diodes, it rounds off the edges of the waveform, smoothing out the harshness. It may also take some of the clarity away, so experiment with different diode and cap values. |