On Thursday 22 November 2012 10:42:35 Mark Wendt did opine: > On Thu, Nov 22, 2012 at 8:23 AM, Dave Caroline > > <dave.thearchiv...@gmail.com> wrote: > > On Thu, Nov 22, 2012 at 1:13 PM, Mark Wendt <wendt.m...@gmail.com> wrote: > >> I've got a Hakko 472 that "Just Works" tm. However, it has one > >> little really annoying trait. The transformer "moans." By that, I > >> mean, it doesn't have a steady hum, but more of a "waaaa, waaaa" in > >> deep bass. ;-) > >> > >> Would I be looking in the right direction were I to assume one or > >> more of the filter caps is starting to go? If not that, anything > >> else I should look for? No schematics of the board, so I'm shooting > >> a bit in the dark here. > > > > Look for loose laminations on the transformer > > > > Dave Caroline > > Okey doke. Will do. > > If they're lose, what methods do y'all suggest for "snugging" them > back up? Varnish? Epoxy? > > Mark
Most 'epoxy's today are way too fast acting, and won't sink into the lamination gaps fast enough to fill them before it sets. I'd try a slow 'spar' varnish & give it a week (or more) to wick in and cure before applying power again. The superglue's wick well unless 'gel' but they have a relatively poor survival compared to well cured varnish if the core gets too hot. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! Real programmers don't bring brown-bag lunches. If the vending machine doesn't sell it, they don't eat it. Vending machines don't sell quiche. ------------------------------------------------------------------------------ Monitor your physical, virtual and cloud infrastructure from a single web console. Get in-depth insight into apps, servers, databases, vmware, SAP, cloud infrastructure, etc. Download 30-day Free Trial. Pricing starts from $795 for 25 servers or applications! http://p.sf.net/sfu/zoho_dev2dev_nov _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
