21 Nov
2008
21 Nov
'08
3:28 p.m.
Matthew Smith wrote:
Quoth Folderol at 2008-11-15 21:49...
You can get a combined infrared led/phototransistor in a 'reflective
switch', which could be neater if you do it that way. I'm using the
opb606 for another project, which costs under 1 UKP.
andy
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.
I have to confess, I do feel an urge to restore it.
I will certainly do preliminary tests (once I've got the thing spinning)
with and LED and a phototransistor, just to see what it sounds like, but
getting a proper setup with the lamp and selenium cell seems like the
Right Thing To Do.