[Hallicrafters] 'Lytic caps needed for Scott amp.

[Russ WQ3X]

Hi Phil -
Here's what you might want to do to keep it original-looking: Cut the FP
cans at or just above the crease near the base with a band saw (or a hacksaw
if very careful). Rotate can while cutting and don't cut all the way thru so
you can possibly yank out the guts using the base to pull on. Remove
remaining guts with longnose pliers - wear rubber gloves. Clean can. Replace
guts with new caps that will fit inside the can. Parallel and series
combinations are permissible to obtain the correct value as well as fit in
there. (No equalizing resistors are necessary on same-value caps in series
due to improved manufacturing methods these days.) I use large heatshrink
tubing to hold everything together. Wire to the proper terminals on the can
base. Insulate leads well using Teflon sleeving. Glue back together (a bead
of clear RTV) and I like to use a band of clear heat shrink on the outside
over the joint after the RTV is dry for additional strength. This is what
the antique radio guys do and it looks and works great. It doesn't take long
to do once you get the hang of it. Others may have their own variation on
this but this has worked for me (YMMV). You can do the same with old
cardboard tube electroytics using hot melt glue on the ends.
Russ WQ3X
Relic-Tronics
www.relic-tronics.com
wq3x at ptd.net



> Hello
>
> First, this may be OT for this list, but the list owner gave me permission
> to post it.  Please reply DIRECT to me.
>
> Overhauling a Scott amplifier for a friend.  As some of the 'lytics have
> leaked & bulged the seals slightly we wish to replace all 'lytics for long
> term reliability (shipping back and forth via UPS gets expensive).
>
> Need a source the following.   ALL are FP can types and a 'small' increase
> in values shouldn't hurt anything.  There are 16 components and 25 wires
> connected to these cans and  there is no room under the chassis to mount
> terminal strips and radial caps (except perhaps for a couple of the 25Volt
> units etc)..
>
> NOTE:  AES is out of stock on all 500 Volt FP caps and have no idea when
> they might get more (due to manufacturing problems).
>
> 1.  30uF/30uF at 500 VDC, FP style Can.  NEED 2.
> 2.  20uF/450VDC, 20uF/450VDC, 25uF/25VDC, 25uF/25VDC, FP Can.  NEED 1.
> 3.  100uF, 100 uF, 100uF, 100 uF at 75VDC, FP Can.    NEED 1.
>
> 73 de Phil  KO6BB