Antennea

[Wayne]

Hello,

I am all but finished completing a copy of the radio shown at the link
below. The antennae required is described in the Description paragraph.

I would like to take and show it to a friend of mine who would be
interested in it. It would be in an office type setting

Question; Being as I cannot stretch out a 50 ft. antennae cable in a small
office, can someone tell me what type of antennae will work in an office
for demonstration purposes ? I am not new to electronics, but new to
radio.

Thank You So Much,

Wayne

http://www.bobsdata.com/crystal_radio/index.html

 

[Michael Black]

On Mon, 6 Oct 2008, Wayne wrote:

Hello,

I am all but finished completing a copy of the radio shown at the link
below. The antennae required is described in the Description paragraph.

I would like to take and show it to a friend of mine who would be
interested in it. It would be in an office type setting

Question; Being as I cannot stretch out a 50 ft. antennae cable in a small
office, can someone tell me what type of antennae will work in an office
for demonstration purposes ? I am not new to electronics, but new to
radio.

Thank You So Much,

Wayne

http://www.bobsdata.com/crystal_radio/index.html


The point of the long antenna is to be able to collect enough signal

for the radio to work. Since there's no radio amplification, there's
nothing to compensate for a short antenna.

Use a loopstick, as found in any radio these days, and use it
and the variable capacitor instead of the tuned circuit in the circuit.

Or look up loop antennas, and use one instead of the tuned circuit
in the radio.

In both cases, that makes the input tuning coil the antenna, so it
likely works better than a short length of wire, but even then there
will be severe limitations.

Michael

 

[Wayne]

Hello,

I am all but finished completing a copy of the radio shown at the link
below. The antennae required is described in the Description paragraph.

I would like to take and show it to a friend of mine who would be
interested in it. It would be in an office type setting

Question; Being as I cannot stretch out a 50 ft. antennae cable in a
small
office, can someone tell me what type of antennae will work in an
office
for demonstration purposes ? I am not new to electronics, but new to
radio.

Thank You So Much,

Wayne

http://www.bobsdata.com/crystal_radio/index.html


The point of the long antenna is to be able to collect enough signal
for the radio to work. Since there's no radio amplification, there's
nothing to compensate for a short antenna.

Use a loopstick, as found in any radio these days, and use it
and the variable capacitor instead of the tuned circuit in the circuit.

Or look up loop antennas, and use one instead of the tuned circuit
in the radio.

In both cases, that makes the input tuning coil the antenna, so it
likely works better than a short length of wire, but even then there
will be severe limitations.

Michael

OK Sir, you have given me the kind of information I have been looking for.
I appreciate it very so kindly.

I knew there were going to be limitations, it calls for 50 ft. What can I
ask when I want to work it in a 8X12 office.

Thank You Mr. Black.

You are a Champ,

Wayne