Hi velcrohead and AllanK
A DC Block inserted into your receivers input will not of course noticeable degrade the performance of the latter, PROVIDED its design specifications meet the receivers frequency operating range and input impedance.
A “homemade” realization of such a device must be considered very carefullly, as the frequency it is supposed to handle is almost 1090MHz ! The capacitors “RF behavior”, as well as its housing (“to behave strictly coaxial” of course) must be in accordance with the RF rules that are indispensable at the frequency it is about. Otherwise, and among others, impedance mismatch might occur, resulting in an increased SWR (Standing Wave Ratio), all of those finally degrading / attenuating the signal “seen” by the receiver.
Following my posting that I’ve been mentioning in reply #12 you will be given an answer, what a DC Block is supposed to be, and really supposed to be for. To repeat myself once more: if in doubt, “google for DC Blocks”, and you may find out about the above yourself. You’ll not find one ! manufacturer, that claims his DC Block to be a ESD protection measure. (He might get into trouble otherwise) You will even find the “blocks” specified for typical “max Input voltages” of 100V DC only, a “nothing” as compared to the potential, ESD voltages may rise up.
Regards
Karl
