splendid job side towards Ground the I don't think so. Line filters, since they are designed to pass only 60 Hz, generally employ large capacitors. They will unbalance the telco lines and load the l
everything So, I'm Hi Dave, If you tried them all, then you have tried more than I have! I've probably only sampled and measured a few dozen types of brute force line filters, and none were really s
Jim, What we have here is a case where a few people think their particular experience with lines and filters somehow means we can misapply filters for the rest of the world without any consequence. d
the parameter standing if I'm miles of wire Central offices have little to do with it Jim. The signal is often in digital form over copper pairs, and is converted to analog at an equipment cluster n
Hi Ray and all, warts are a prime use only the cable ancillary station kept galvanically Actually the opposite is true. "Ground loops" occur because various pieces of gear use common supplies. The mo
Hi Ray and all, warts are a prime use only the cable ancillary station kept galvanically Actually the opposite is true. "Ground loops" occur because various pieces of gear use common supplies. The mo
measure this like Repeaters are an entirely different case. In the case of a repeater duplexing from one antenna, you have all of the transmitter power conveyed on the system that is also receiving
suitable I clearly said I'm sure it can happen. I never said it couldn't, so I never dismissed anything. My actual statement was that I've never seen a case where wiggling the shield in any system I
If you use a line bypass (good idea), be absolutely sure it is a UL/CSA/VDE approved bypass for power line applications!! .01uF 1kV discs are not safe! 73, Tom W8JI guessing the power _______________
a multiple radio level of 1500 Hi Rich, When you go to reflectors seeking out answers you'll get specific detailed technical answers from everyone even though almost no one fully understands what yo
positive and So far as "good enginering" goes, number one above causes a conflict with number 2 below. the braid MAKE SURE CAR BODY. antenna Think about it a while, maybe while drawing the entire sy
Why does that matter? When you it's on that That's not worth even considering Jim. The issue is NOT differential mode RF on the power cables. That are always very well bypassed together, and PA's of
problems with power only is I totally disagree for all the reasons I gave. 73 Tom _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mail
voltage factory installed RFI problem the battery. Hi Dave, Why don't you connect a signal generator in differential mode to the battery leads and measure the RF ingress into the radio, and compare
negative directly to the ensure a low What everyone seems to fail to consider is the vehicle chassis itself is always less resistance than the long lead from the radio ground to the battery post, an
Absolutely. I agree fully with that.....but running the radio negative lead to the battery negative post is NOT one of them. awful negative from the 2m The phrase is "ground loop". If you ground to
radio all they suggests radio DC braid. battery battery. The best configuration, assuming the installer is somehow not able to figure out what is a good connection to the unibody, is to run a lead t
Rich, Those are very nice numbers, and I'm sure they are based on some factual information in a certain test. Now here it comes!! DB is a ratio. To actually use numbers that are expressed in dB, you
bump up in mileage Plus you don't that they get on Except diesels now have electronic controlled injectors that are often as bad as or even worse than spark plugs. :-( 73 Tom _______________________
neighbor's home. like to know they affect visible cord that Kelly, I have RFI proofed photocell lights, garage door openers, and other things with .01 uF UL/CSA approved line bypass capacitors rated