I did a layout for R.G.Keen’s LoFi Telephone Noise already, but with Mark Hammer mods and the noise part removed. I wanted to revisit the effect and keep the noise part as an option this time around.
After having built it I had problem getting any noise out of it at all and ended up tacking on a different “white noise” circuit snippet instead.
I don’t think the white noise blended with the signal sounds entirely convincing, but it’s an interesting effect none the less. And there’s a lot of noise on tap if you’d want it 😉
I was able to single out a single 2N2222A transistor for the noise source that was acting a lot noisier than the rest of the lot.