Hi John,

A 100V cap should be fine. A mylar, polyester, ceramic, or any other film
type should be ok. I modified a friend's old Radio Shack TRF radio many
years ago with this same mod; this way, the low end of the MW band was
useful. Let me know if you have any problem getting ahold of the part.

Pete

wrote in message
...
On Aug 24, 4:15 pm, "Pete KE9OA" wrote:
I understand John.................actually, the power supply/regulator
board
is a separate board that is held down with three small screws. The
secondary
of the power transformer connects to two large pads on the board. The 1uF
100V non polarized cap can be soldered on the underside of the board.
Normally, the power supply diodes have a radiated power density that
decays
pretty quickly above 600kHz or so. The manufacturer must have been using
some pretty fast switching diodes when they built this radio. The
difference
after the mod is day and night.......it is as if a switch was turned off
on
the interfering source.
When I had the radio open, I took a look at the loopstick antenna. It
appears to be the same type of twin coil ferrite that is used in the
CCRadio
Shortwave. One of these days, I will dismantle it further and see if there
are any alignment points for the MW range. My unit droops in sensitivity
below 540kHz. This is typical of many radios when the loopstick is aligned
at 600kHz for the low end of the band. I also noticed this with the Sony
6800W.
If you could find a tech in your area, that person would be able to do the
power supply mod in about 10 minutes. If you need any more details, feel
free to e-mail me anytime at


Pete

Thanks so much Pete, that's really useful and kind of you. I do have a
local ham in the village that is as good as an Olympic swordsman with
a soldering iron, so I shall go and ask him.

BTW that "The 1uF 100V non polarized cap"
that you mention - my set is a RP2100 from China with 240v AC mains,
does that alter the value?

best of 73's
JP in Montagu South Africa