Mike,
Having some form of Antenna Input Protection is a Good Idea.
- - - Instead of a Single Diode: *--|--@
* = Ground -and- @ = Antenna
# 1. Good - Try a two sets of Double Diodes.
*--|--|--@
*--|--|--@
# 2. Better - Use a Gas Discharge Tube (GDT) for EMF shunting and a
10K Ohm Resister for Static Electricity Bleed-Off to Prevent Static
Electricity Build-Up and Discharge.
*----(o----@
*--\/\/\/--@
# 3. "Best" is an Improvement to #2 would be to replace the 10K Ohm
Resister with a with a 10K Audio Taper Potentiometer.
+ One Leg/End goes to the Antenna.
+ The 'other' Leg/End goes to Ground.
+ Then the Center of the POT goes to the Radio.
+ The Radio's Ground is also connected to the common Ground.
NOTE: The 10K POT now acts as a Bleed Resister and also an External
RF signal Attenuator.
*----(o----@
*--\/\/\/--@
*====^=====@
*====|
*====R
R = Radio
iane ~ RHF
..
..
= = = mike
= = = wrote in message . ..
Sony 7600GR portable
I figured out the image problem. I think it's the voltage limiting
diodes I place yesterday across my antenna input to ground.
mike
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