[TowerTalk] LightningProtectionDevicesPolyP, Response DAVIS RF Co.

[Roger (K8RI)]

jimlux wrote:
> Gary Schafer wrote:
>   
>> Polyphaser has used gas tubes in their coax protection devices from day one.
>>
>>     
Seems as if I remember Polyphaser advertising they were solid state. The 
ones I've had fail were all solid state with a tiny solid state device  
inside. No spark gap and no discharge tube that I could find. They were 
more like a bipolar diode and worked very well.
I've had several gas discharge devices apart and they sure looked different.

Roger (K8RI)
>> The reason for the series capacitor is to allow the gas tube to fire before
>> enough energy is passed into the circuit following the protector. If there
>> was  no capacitor and the radio or cavity following the protector had a coil
>> in its circuit that provided a DC ground then the gas tube would not fire
>> until a large amount of energy passed into the coil and into the radio etc.
>>
>>