Hi
You likely would get more noise density out of the NE-2 than the incandescent
bulb. The
advantage of the incandescent is that you can estimate the temperature fairly
accurately
and thus come up with the noise by calculation. We did the build as part of a
radio club
meeting back in the 60’s
On 4/12/17 6:33 PM, Bob kb8tq wrote:
Hi
Back in the day (1960’s) noise diodes were quite a bit more expensive than they
are today. Even
today, a miniature lightbulb is quite a bit less expensive than a noise diode.
You don’t go that way
because it’s better. You go that way because it’s cheap …
Hi
Back in the day (1960’s) noise diodes were quite a bit more expensive than they
are today. Even
today, a miniature lightbulb is quite a bit less expensive than a noise diode.
You don’t go that way
because it’s better. You go that way because it’s cheap ….
Bob
> On Apr 12, 2017, at 7:04 PM,
On 4/12/17 1:23 PM, Bob kb8tq wrote:
Hi
*All* incandescent lamps emit RF ….. They are a resistive device that is heated
to well above
room temperature. People do use them in simple noise figure meters. The
inductance of the
filament in a typical bulb restricts the bandwidth a bit. The are des
