[R-390] need more help

[Gene Beckwith]

Barry,

once again ....Hooo Raaa...

Too bad there arn't more out there with the 'can do spirit...'

btw...most of my pets are turned on and off with external swithces...via
variacs..just for the fun of watching all the V and A meters work...so far no
biggies with the micro switch...and yes...they can be rebuilt...with 'fiddling,
tinkering, and appropriate excerpts from the  "Marine Language Manual" for all
occasions...and a few "807's to add to the fun...

Gene

Barry Hauser wrote:

> I can see you're new aroun' here.
>
> It's not the function switch, and they're generally not for sale as a matter
> of principle.  Most other parts are for sale, but not function switches.
> You can buy a panel with some stuff hanging on it, but not a function
> switch.  And if you buy a panel, the microswitch may well be bad on it.
>
> It is the microswitch on the function switch assembly that you need -- but
> you don't need it yet -- and you can't have one -- yet.
>
> It is in the hallowed tradition of R-390-ers (both A, non-A and hybrid) to
> first attempt a fix of any defective part.  While it is customary outside
> this circle to treat a microswitch as a "sealed unit", such notions are
> eschewed, discouraged and basically run outta town on a rail, in these
> parts.  That would be like stopping cold in one's tracks when encountering
> the dastardly challenge:  "Do Not Open.  No user serviceable parts inside.
> Refer to a qualified technician."
>
> Most likely the contacts have fused in the microswitch.  Before I forget,
> make sure the screwdriver operated switch in the back is turned to "Ovens
> Off".  Don't ask, just do it and read up on it later.
>
> So, unplug the receiver from the AC outlet, drop the panel (according to
> procedure) and put an ohmmeter across the the microswitch terminals.
> Operate the switch from off to standby to AVC, etc.  When going from off to
> the other positions, it should go from open to nearly zero ohms.  Most
> likely, it will read zero ohms in all positions.
>
> If so, it's either because the contacts have become fused or the microswitch
> position is not properly adjusted, such that it's always on.  Or perhaps,
> there may be some gunk around it that needs to be cleaned away.  See if you
> can make it make/break the connection by some studious fiddling.  (Fiddling
> is a form of tinkering, and this is also required)
>
> Does it click at all?  If it just needs to be adjusted, that will be
> obvious.  If not, the next step is to remove the microswitch, take it apart,
> being mindful of airborne springs, and free up the contacts.  Then burnish
> them with a stick or something and treat them with some DeOxit (which you
> are required to have).  Reassemble and test.  Some of them are put together
> with small screws -- others are riveted, presenting a minor challenge to the
> determined man with a drill.  Replace the microswitch, and carefully adjust
> position so that it now works.  If you had to drill out the rivets, replace
> with suitable screws and nuts.
>
> Once you've tried all that -- and it still doesn't work -- submit a full
> report, have it notarized, and then come back.
>
> (Some people here and there have NOS microswitches.  Maybe Dave Medley.
> Maybe Hank (Dan) Arney, or maybe you can get a used one from Fair Radio.  I
> have two NOS switches, but you can't have 'em.
>
> Y'see Scott, to better understand and get properly indoctrinated, follow
> this guide:  An R-390 guy needs to fix a loose plank on his deck.  Needs two
> 10-penny nails.  Down to his last two, but one is bent and the other is
> broken in half.  Go to Home Depot -- Naaaahhhhh!  Ace is the Place -- NOPE!
> Straighten out the first one and weld the other one back together.  OK, a
> little grinding to get it smooth enough to drive in.
>
> It's not so much the money, more like the guy who climbs the mountain
> "because it's there".  Heck, we'll even fix gassy tubes.  The broken ones
> are more of a challenge because it's tricky to re-fuse the glass fragments,
> and then a bit dicier to replace the vacuum.
>
> Barry
> PS -- did you read the "Pearls"
>
> ----- Original Message -----
> From: "Scott Bauer" <odyslim@comcast.net>
> To: "R390 List" <r-390@mailman.qth.net>
> Sent: Tuesday, June 17, 2003 8:16 PM
> Subject: [R-390] need more help
>
> > Okay,
> >
> >  Does anybody have a function switch for sale.
> >
> >  Thanks,  Scott
> > _______________________________________________
> > R-390 mailing list
> > R-390@mailman.qth.net
> > http://mailman.qth.net/mailman/listinfo/r-390
> >
>
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