Mike, Perhaps the best course is to choose the unit with the highest Joule rating that meets your power level and frequency ratings. Do not buy a DC-blocked unit if you don't need that feature, because the capacitor is usually the first component to fail. Do not buy a used unit, because it was pulled from service for a reason- probably because the gas tube has reached the end of life due to multiple firings. Finally, be certain that you have a robust grounding connection from the PolyPhaser to Mother Earth; do not depend on the "green wire" conductor in the power cord to provide this connection.
73, Eric Lemmon WB6FLY -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Michael Ryan Sent: Monday, August 16, 2010 11:51 PM To: [email protected] Subject: [Repeater-Builder] Polyphaser Question I notice when looking at the Polyphaser website, there are a wide range of products, even a wide variety of items that on the surface appear to be suited to my particular needs. I want to put a Polyphaser on my 220 repeater. There are DC blocked and unblocked. I don't suppose it matters in that area as there is no DC going up the coax. There are freq ranges, 1.5-400 and 100 - 700 mhz, etc, etc.. Is it best to select a model that places my operating freq somewhere in the middle of the unit's operating range or does that matter as long as it IS WITHIN the range of the device someplace? I need the protected end to be an N-female and the antenna end to be and N-Male. Suggestions? - Mike
