Hi The gotcha with coating (at least with RF coils is that the adsorption / desorption process gets really crazy. You may slow the “going in” part down to a week. The “getting out” part may turn into (many) months. That’s what makes the “stored on a shelf and then turned on” thing a mess. It takes a *long* time for things to stabilize.
Again - this is all RF based. Some of what happens applies at DC. Some of what happens simply does not matter at very low frequencies. Bob > On Nov 27, 2017, at 6:41 PM, Bruce Griffiths <[email protected]> > wrote: > > However the dimensions of the coil former vary with moisture content. > Impregnation with waxes and other organic materials merely serves to slow > down the rate of absorption and doesn't prevent it. > Bruce >> On 28 November 2017 at 12:36 Poul-Henning Kamp <[email protected]> wrote: >> >> >> -------- >> In message <[email protected]>, Bob kb8tq writes: >> >>> Straight cardboard *is* an issue on RF coils in humidity. >> >> The C-field coil is DC only. >> >> -- >> Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 >> [email protected] | TCP/IP since RFC 956 >> FreeBSD committer | BSD since 4.3-tahoe >> Never attribute to malice what can adequately be explained by incompetence. >> _______________________________________________ >> 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.
