"N Cook" wrote in message
...

JANA wrote in message
...
In many of these types of receivers, there is either a gold leaf
capacitor,
or a battery backup.

For the gold leaf capacitor they are usually in the order of about 0.4
Farad
to about 0.5 Farad. The voltage rating can be from about 3.5 VDC to about
5.5 VDC.

If the set uses a battery for the memory backup, it may be very similar
to
that is used in many of the mother boards of computers. They are usually
in
the range of 3 VDC.

You have to be careful when changing parts in these receivers. Most of
the
time, the battery may be with hard contacts and soldered to the circuit
board.

--

JANA
_____


"Greg Esres" wrote in message
oups.com...
I have a 20-year-old Onkyo receiver that has some radio presets that
have *never* held their settings for more than a couple of days. Is
it likely there are any user-serviceable parts inside that I might
could replace to make this function correctly?

Thanks



You had me worried there for a moment - that I'd been throwing gold leaf
in
the trash. Anyone know what the construction is of these fractional farad
memory retention caps ?


One of the trade names for them was "Goldcaps" I think - it's certainly a
name that I use for them - but I wasn't aware that gold was in any way part
of the construction. Even if it is, gold leaf, or gold in such tiny
quantities as would be in such an item, is valueless, unless you have a lot
of it passing through your hands, as the recyclers of computer mother boards
do. I saw a programme on that brilliant "How do they do that ?" series on
Sky the other day, where they were removing all the gold plating from the
connectors and CPU pins. They were dealing in skip-loads of the stuff, and
recovering a very respectable amount of gold, but it was hard work ...

Arfa