Larry, Thanks for the info. What is 'RO'? I am not familiar with that abbreviation.
Joe -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Larry McDavid Sent: Thursday, January 23, 2014 10:34 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Z3816A Control and Cleaning I recommend against using tap water on any electronics. Use RO or distilled water; that won't leave behind minerals when it evaporates. Most IPA is only 70%; the balance is water. For flux removal, use 99% or anhydrous IPA, available at most industrial hardware stores. And, I surely would not use "soap" of any kind. You can use a detergent but only a tiny amount is needed to reduce the surface tension. If you don't get it all off by flushing, residue after evaporation of any surfactant is not good... Larry On 1/23/2014 7:13 PM, paul swed wrote: > Joe > Been a while. Sounds like a reasonable approach with the soap and water. > The key is not to force water into the inductors. I take soapy water > and a tooth brush it works wonders. Then dry in an oven at about 100 > degrees just to drive off the moisture. Very gentle. > I guess the other point is to get a better feel for the gunk. Does > soap and water do it. The fact that IPA didn't is interesting. It may be oil based. > Good luck > Paul > WB8TSL/1 > > > On Thu, Jan 23, 2014 at 9:41 PM, J. L. Trantham <[email protected]> wrote: > >> I recently acquired a Z3816A as a 'spare' and it does not work reliably. >> The ALARM LED sometimes comes on and sometimes doesn't. Sometimes it >> tracks and locks appropriately and other times it goes into HOLDOVER. >> The main PCB is very dirty and has the appearance that it has been in >> a humid and dusty environment. I am suspicious that there are some >> 'leakage' issues related to this dirt and would like to wash the >> board. What would the group recommend for cleaning the board? I >> sprayed it with 91% IPA and used a paint brush to try to clean the >> board. Some improvement but still dirty. >> I >> was thinking of warm soapy water with a paint brush followed by warm >> water followed by 91% IPA followed by a hairdryer then an hour or two >> in an oven at about 100 to 150 degrees F. Thoughts? I'm a bit >> concerned about the inductors and the possibility of water leading to problems with them. >> >> >> >> Also, I seem to recall a command that can be sent by SatStat to >> change from GPS time to UTC time but I can't find it in my files. Is >> there such a command or am I hallucinating? >> >> >> >> Thanks in advance. >> >> >> >> Joe >> >> _______________________________________________ >> time-nuts mailing list -- [email protected] To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> > _______________________________________________ > time-nuts mailing list -- [email protected] To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland) _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
