15 Nov
2008
15 Nov
'08
7:19 a.m.
On Sat, 15 Nov 2008 14:06:51 +1030
Matthew Smith <matt(a)smiffytech.com> wrote:
Quoth James Cameron at 2008-11-15 13:30...
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
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