Looks like you have great advice. But I will add if the tantalums show the corrosion do not fire it up. Unless you like smoke and other damage. A good way to extend the time you will spend getting it going and cleaning up the acid all over everything. Lots-O-fun. Good luck and I have always heard the mechanics were the challenge. No real experience. Regards Paul WB8TSL
On Fri, Dec 23, 2016 at 6:24 PM, Hugh Blemings <h...@blemings.org> wrote: > Hiya, > > My thanks for the various replies including to Luciano for the 115BR > manual and Chuck for the timely advice about old caps! > > I'll take a put at summarising the various replies and my own observations > now I've the 115BR Manual and the 115CR unit itself - any errors in same > mine alone; > > The 115CR appears to be a slightly later device - it's 2RU rather than 3RU > and uses plug in PCBs rather than point to point/tag strip style > construction. > > Based on a quick glance at the 115BR service manual and the 115CR unit > itself, I'd venture they are electrically and mechanically very similar, > possibly identical. > > The 115CR seems to have hard wired DC input polarity relative to ground > wheras the the BR is switchable. The 115CR doesn't have a meter or as many > frequency output options. > > Maintenance wise; > > * Divider circuits need to be manually started using internal switches, > the unit has built in rack rails to support easy access. Similarly the > motor must be manually started. > > * Many of the silver can (physically larger) axial capacitors on the PCBs > in my unit show signs of corrosion - this presumably the acid leaking out > of the tantalum caps as Chuck alluded to. > > * One correspondent suggested replacing the caps right from the word go, > another to go for broke and turn it on - not sure which way I'll go yet ;) > > * The mechanical odometer style display needs care not to bind up/jam. > Attention to lubrication/grease for the motor and other bearings seems > prudent. Don't force any of the mechanical components. > > * Looks like I can get a paper manual here http://www.etestmanuals.com/Se > arch.aspx?Search=115CR - I think this will be my next step. > > I'll close for now with this quote from Chuck which may dash my plans to > have it on permanent operating display; > > "These clocks are not a lot of fun to live with. They sing along > quite loudly at 1KHz." > > ...so might not be ideal in the otherwise quiet lounge room after all :) > > Thanks again all for the input so far, will report further progress when I > return to the device in the new year after a house move :) > > Cheers, > Hugh > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/m > ailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.