Remember lightning can induce some large voltages on the phone lines too.
(got a receiver smoked in the 70's by using a "very ,very long wire" like
antenna.
Most have 70 volt ringer voltage, some with much higher voltage spikes,
rating on cap should be high, .01 at 200 volt big is usually a sign of
higher voltage rating. Ceramic. and voltage limiter of some sort, 50/100
volt (sounds like a neon bulb!) on the other side of the cap (not telco
side )
Good idea is a preamp, but you needs good FM TV signal killer filter in
front.
0.1 may be too big, lets in too much noise from power lines.
The line may look like a high impedance, 1000 ohms or more, but the preamp
is your "matching" device.
**Don't let the phone people find out, they control the government.**




"Dan Jacobson" wrote in message
...
http://www.rdrop.com/users/billmc/phone_antenna is built around
a ".01uF capacitor", but what kind? Are big .01uF capacitors better
than small ones etc.?

Is .01uF critical or is there actually a range that is acceptable?

Also the "RF connector" isn't clear. What are examples of this "radio
frequency connector"? Perhaps just coax to alligator clip?

Is the 50 ohm coax critical? How about a plain wire from the capacitor
to the radio's telescoping antenna? Should the telescoping antenna
still be extended, or retracted?

How do we know if our phone line antenna is working properly? Should
time signals on 5000, 10000 khz etc. jump out in perfect clarity?

Certainly there must be a slight advantage between one of red and
green vs. the other... or might we not even bother comparing, as they
are certain to be the same?

By the way, I found a .01uF capacitor that the capacitor numbers web pages
don't seem to decode: 103K PE50. I can't figure out what the PE50 or
PE5Q means.

Lastly, the article has some spelling mistakes, e.g., lightening
arrestors.