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Does anyone have the spice model for the 1N270 Germanium Diode? I have found several online libraries of spice models for diodes, but none of them have the 1N270. A google search didn't find it, although I found a couple of postings where the author used a model for 1N270, so I think it must exist somewhere. I am using ngspice, but I think any spice model would be usable for me.

ChipJust
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    You could use the 1N34A model, much more easily found, which is a germanium diode as well: .MODEL 1N34A D(bv=75 cjo=0.5e-12 eg=0.67 ibv=18e-3 is=2e-7 rs=7 n=1.3 vj=0.1 m=0.27). Some guy [plotted](http://www.cliftonlaboratories.com/diode_vf_vs_if.htm) both this model's characteristics and the real 1N270, and it's close enough. – dim Jun 24 '16 at 13:36
  • And, by the way, I'd avoid designing circuits with those anyway, since they're [unobtainium](http://electronics.stackexchange.com/questions/105597/1n34-1n270-obsolete) – dim Jun 24 '16 at 13:45
  • I just bought 20... I have seen other people substituting other diodes for this one in spice, but I thought someone should have the actual model for this one. – ChipJust Jun 24 '16 at 14:41
  • [1N270 on Jameco](https://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_35941_-1) – ChipJust Jun 24 '16 at 14:49
  • Ok... Still thinking you could use some schottky. Looking at the datasheet, it doesn't seem 1N270 performances are better than BAT41... – dim Jun 24 '16 at 15:04
  • I am making distortion circuits for guitar. So yes, I also have some Schottky diodes. They do sound different. Anyway, I have some ideas about how to get better sounding harmonic distortion, but to actually use some engineering to get there it would be nice to have models for the components... – ChipJust Jun 24 '16 at 15:31
  • Ha!! I knew it was for guitar effects... You guys are the last people on earth to use those germanium diodes. Ok, fine, if they *sound different*, then :) – dim Jun 24 '16 at 15:34
  • I guess I can use the data sheet to derive the Is, etc...just surprised this model is not available. – ChipJust Jun 24 '16 at 15:48

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