And remember that as far as lightning is concerned, INDUCTANCE can be a far greater factor than resistance in limiting the speed of discharge (and thus the voltage buildup). So follow basic circuit c
If it were only that simple! Lighting will go where it wants to go. If you route the cables around the house, it's more inductance, which makes lightning more likely to arc through the house. Remembe
There was a HUGE warehouse full of several versions of this stuff, left over from bankruptcy of a major ISP/cell phone company. One of my ham buddies found it and visited it last fall, and bought a c
In general, more is better -- more rods, deeper, wider spacing, but all tied together. It won't hurt a thing. Note that ground rods primarily enhance SAFETY ground, not antenna performance. Of course
Yeah, but this is NOT brain surgery, nor does justify a dozen posts to the reflector. Haul out your wire tables that show resistance per foot for various wire sizes, use your VOM to measure the curr
A good manual would specify maximum loop resistance. Who knows how long the cable is. Jim _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers",
Hogwash! The receiver front end is of far greater consequence. Jim Brown K9YC _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless We
I'm thinking about building some narrow band filters (as opposed to a bandpass filter that covers an entire band) for use on Field Day. The object is to minimize crosstalk between CW and sideband sta
Yes, I had thought of that but have not taken action on it yet. We're going to try some more informal tests as well, using some of our rigs running mobile, parked in the driveway of a fellow ham's QT
I have no experience with the MFJ unit, but my ANC4 is a dog for overload from broadcast signals that aren't even very strong at my QTH (nothing within 7 miles of me). I understand that newer product
whatever. Where it started was me asking about narrower filters to suppress IN band interference (CW and SSB on Field Day). We are already working with 100 w to good dipoles at roughly 400' from each
The latter is more like what I had in mind. For most CW contests, one would be pretty happy with the center of the filter at 14025. The lowest frequency of interest on SSB is 14150, and perhaps you d
There is a company there that purchased what was left of both RF Concepts and Alpha. Perhaps that's who you're thinking of. A google search on "RF Concepts" will turn them up. I spoke with them and t
I'm looking for a manual for this unit. Jim K9YC _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's mo
IMO, there is a wealth of good thinking behind this email. You have given me some great ideas. Thanks, Bill. Jim K9YC _______________________________________________ See: http://www.mscomputer.com fo
I strongly agree, and I almost never reply directly to the original poster of a question. If I do, it is by mistake (or because I specifically want the reply to be private). I really think that the d
Yes, but perhaps they have thinner skins than they should. A reply is NOT a flame if it says "I think you're wrong and here's why." That's peer review, and it helps keep all of us straight. It preven
One of the guys in our local ham club came back from Dayton with a very interesting new product from DX Engineering. As soon as he showed it to me, I called up DX Engineering and bought two of them.
What is coming into the house on a 600 ohm balanced pair? An RF transmission line I would believe. A telco line or audio line I would not. The military surplus field telephone transmission line bein
I have a similar problem in my 110 year old Chicago house -- telco on the northeast side of the house, power on the southeast. Last I looked, code says that all grounds must be bonded together. It is