[cctalk] Re: TK50/70 Repair

I think it's metal, but using a bit of good old soapy water and a rinse/dry should be fine. Remember that there is a little window screen part there to ensure the optical system only sees the slit right under it, don't forget to install it as well. Glad to hear there is progress. Let us know how it works out! C On 2/8/2023 10:06 AM, Nigel Johnson Ham via cctalk wrote: > Well, I found dust and what looks like oil on the optical wheel.  It > looks like somebody may have tried to lube the bearings in situ and > used too much oil :-( > > I'm amused to see that it uses the same moiré principle that was used > way back in the RK05! > > Do you know if the pattern on the wheel is purely cut out, or is > there any photographic film involved?  I think the only possible > solution would be to clean it with isopropyl, but useless to do that > if it is film.