Variac

Jim Bowman jimbowman at SEANET.COM
Fri Feb 1 16:37:41 EST 2008


I have wondered of it is possible to insert a fuse of some kind
(slo-blo?), that would handle the normal surge, in series with the caps
connections so that the fuses would blow if the caps ever shorted, and
would prevent damage to the transformer, etc?

73,

Jim W7HPK




"L.G. Robertson" wrote:
> 
> There are many who feel this way...but if that reformed electrolytic blows
> (and they can), it might drag the transformer and (if the set has one) the
> electrodynamic speaker field coil with it, etc etc.  Now you have to
> replace the electrolytics anyway, AND maybe a transformer (_if_ you can
> find the right one), speaker field coil, etc etc.
> 
> _Now_ how much is that non-glowing, non-working firebottle box worth?
> 
> The general ethic I use is that if the electrolytics are above the chassis
> line, I leave them in place, remove them from the circuit, put in new ones
> _underneath_ the chassis, and leave the old outer shells in place.
> 
> Or, for a real purist approach, if the situation calls for it, I take the
> old "innards" out of the electrolytic, put new, miniature types inside, and
> seal the whole thing back up with the original wax, seals, etc, and then
> use the appropriate type of wire to complete the hookup.  To look at it
> you'd never know there were new caps inside the old shells.
> 
> -Lin/KJ6EF
> 
> At 06:28 PM 01/31/2008, you wrote:
> >IMO, restored gear is a lot less desirable than original antique gear. Hence I
> >don't recap.
> >
> >-John
> >
> >
> >
> >L.G. Robertson wrote:
> >
> > > At 01:30 PM 01/31/2008, you wrote:
> > > >I have come to the opinion that I should just plan on changing the
> > > >electrolytics for new ones even before I bring up the radio. Haste makes
> > > >waste. If the cap(s) don't fail now they will probably fail pretty soon so
> > > >just go ahead and change them out right at the start.
> > > >
> > > >Bob, WA2CKY
> > >
> > > Same here, after 40 years of fooling with 'em...you can get away with
> > > reforming them _sometimes_...but it still makes me a tad nervous to run a
> > > rig with reformed electrolytics....it's always in the back of your
> > > mind...so I mostly just replace them; they're usually not too expensive.
> > >
> > > But transfomers ARE.
> > >
> > > -Lin/KJ6EF
> >
> >-----------------------------------------------------------
> >This list is a public service of the City of Tempe, Arizona
> >-----------------------------------------------------------
> >
> >Subscription control -
> >http://www.tempe.gov/lists/control.aspx?list=BOATANCHORS
> >To post - BOATANCHORS at LISTSERV.TEMPE.GOV
> >Archives - http://listserv.tempe.gov/archives/BOATANCHORS.html
> 
> -----------------------------------------------------------
> This list is a public service of the City of Tempe, Arizona
> -----------------------------------------------------------
> 
> Subscription control - http://www.tempe.gov/lists/control.aspx?list=BOATANCHORS
> To post - BOATANCHORS at LISTSERV.TEMPE.GOV
> Archives - http://listserv.tempe.gov/archives/BOATANCHORS.html

-----------------------------------------------------------
This list is a public service of the City of Tempe, Arizona
-----------------------------------------------------------

Subscription control - http://www.tempe.gov/lists/control.aspx?list=BOATANCHORS
To post - BOATANCHORS at LISTSERV.TEMPE.GOV
Archives - http://listserv.tempe.gov/archives/BOATANCHORS.html




More information about the Boatanchors mailing list