In article ,
N8KDV wrote:

Dale Parfitt wrote:

RHF wrote:

JS,

I have used the NE-2 Neon Bulb and 10K Ohm Risistor with my portable
radio Antenna "GIZMOE" Connector Box to protect the external antenna
inputs of several radios.

I have also used a double pairing of Forward & Reverse Diodes to act
as a low voltage shunts along with the NE-2 Neon Bulb as the Higher
Voltage Shunt and the 10K Ohm Resistor for Static Bleed-Off.


Neon tubes "fire" at around 80-110V. Can your front end take this? Older
tube rigs
can, not sure I would bet on a FET front end.
A pair of diodes right on the input can be disastrous. They are a nonlinear
device,
easily driven into generating all sorts of mixing products- as they are
right at the
antenna, everything from local AM, FM and TV will be seen by the diodes.

Dale W4OP

Some very good points Dale.

He is more than right. Diodes are used as broadband white noise sources
in test equipment.

--
Telamon
Ventura, California