DP,

1. When the radio is not being used the POT is set to Zero and the
Receiver's Antenna Input is Shorted-Out and Grounded.

2. This is a 'set' of both Forward and Reverse Diodes Dual [Doubled]

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If you have enough wide band RF signal levels to make these dual
diodes work then with a modern solid state radio most likely you have
major front-end overload in the radio.


~ RHF
..
..
= = = Dale Parfitt
= = = wrote in message ...
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