On Sat, 15 Nov 2008 14:06:51 +1030 Matthew Smith <matt@xxxxxxxxxxxxxx> wrote: > Quoth James Cameron at 2008-11-15 13:30... > > > What you describe reminds me of a very low frequency RF oscillator with > > an audio tone added in. I'd like to see a photograph of the wiggly > > line, as I suspect it is not a simple sine wave, > > Here are the photos so far, per Plutek's request: > <http://www.flickr.com/photos/msmiffy/sets/72157609086659400/> > > I might pull the rotor off completely once I've put penetrating oil on > all the rusty bits - then I'll get a close-up of the entire rotor. > > I'm pretty sure that the way that the line is marked would mean that the > tone would run as a sweep between the lower and upper frequencies - and > 25 times per second at that. Should be an interesting noise - > especially once it's been fed into a synth ;-) > > > Does it start slowly? > That I can't tell as I haven't powered it yet. Think I might replace > the capacitor first - don't know what will happen if I energise a 40 > year old capacitor, but don't want my office full of shrapnel. > > Rotor spins very freely so I'd guess that it would get to full speed > quite quickly. > > Cheers > > M > Fascinating bit of kit. I'd be inclined to try to keep it as complete and original as possible. I doubt you'd have a problem with the capacitor. I know someone with a WW2 communications set that still has almost all it's 'dry' caps, and only half the electrolytics have been changed. -- Will J Godfrey http://www.musically.me.uk _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
