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A ring down circuit is any arrangement of circuitry that causes two or more connected telephones to ring when any of the others is taken off hook. In current usage it only works in a common battery arrangement so that the ringing circuitry can detect a phone going off hook. Much earlier...

OK so I don't know. What is the minimum tow vehicle for a 105 and shelter? I have been lusting after a mobile shelter rig forever. I'm tempted to try to set a shelter up on a flat trailer in order to use the space under each side of the S-250 type of shelter to stow my two AB-952 antenna...

It might be simpler than that. Program the cell tower control equipment to deny service to any cell phone that is moving faster than a brisk walk. Please don't bellyache about the inconvenience to passengers. There is good research that documents that it is more distracting to hear half of a...

When I was a Zoomy; low these many years ago; the armorers on the B-52 Bombers would leave the rear quad mount fifties on automatic tracking so that the mount would track the security police sentry that was carrying a rifle every time he passed the tail of the bird on his patrol. Then the base...

I believe that the Michigan State Police did field testing of warning lights that indicated that more was not necessarily better especially when parked by the roadside. There findings were that the more elaborate lighting schemes draw impaired drivers to you like a moth to a flame. Dr Steven...

Once again I am learning something I did not know. I have a two inch draw bar hitch on a box frame that is attached to my work van's frame in four places. I had believed that was the safest point to use when assisting a motorist that is stranded in a bad spot in moving to a safer place usually...

Your tag line suggests that you might enjoy a quote from a very wise fire chief. "Lock a team of fire fighters in a maximum security prison cell. Provide them with bag lunches so that they won't whine too much. Before you leave kick in two ship unloading crane ball bearings that are eight...

I'm sorry about the multiple postings. I was just asking the questions that arose out of each post I had a question about as I came to it. If I waited until I read the entire thread I would loose track of some of the questions that I wanted to ask. I finally figured out that I should use the...

I cannot tell you why but when I was working for California Division of Forestry; which is now the California Department of Forestry & Fire Protection; as well as the US Forest Service tying down tractors by their treads was an absolutely forbidden practice. It was a yellow flag item that could...

I'm sorry but I couldn't follow what you are suggesting. On the premise that the only stupid question is one I'm too chicken to ask do you mean that the tie down point must be inside the outer edge of the bed somehow? I'm asking because I see tie down straps and chains run over the outside of...

I'm glad that one of us does??? -- Tom Horne

So for the sake of my education what can be done to address the concern about the front end of the tow bar burying itself in the asphalt and causing a truly violent stop. Could you just rig an additional chain around the front notch of the tow bar?

I am curious so please don't take this as criticism. I see what looks like an air line coupling on the front left of the towed vehicle. Is it practical to rig up an air line and use the towed vehicles brakes in addition to the towing vehicles brakes or is there something that makes that...

Dielectric grease is non conductive. It is used to prevent galvanic corrosion between dissimilar metals, among other things, and should not be used on connections were conductivity is specifically desired. -- Tom Horne

I'm interested in setting up an S250 as a mobile radio room on trailer. What I need is advice from those with actual experience. Can such a set up be towed with a Chevy Express van with the smaller eight cylinder engine without burning up the engine or transmission? -- Tom Horne

Surplus cable grips and come alongs with any kind of tripod or a frame will extract the rods just fine. There are also rod lifters and fence post pullers that you can buy but I prefer multi use devices. -- Tom

If you go the single use tool route then you might prefer the Brush Grubber Rod/Post Puller, Model# BG15 <Brush Grubber Rod/Post Puller, Model# BG15 | Fencing | Northern Tool + Equipment> It will extract rods that are driven nearly all the way in and even those that were driven all the way in...

Do you still have one that you would sell? Please PM me with what you would need to see for one. -- Tom

The fines for unlicensed transmissions start at five thousand and can be as much as fifteen thousand dollars for each day in which the violation continues to occur. If the offender is an individual the FCC usually will settle for around $7500 unless they determine that the violation was...

I'm licensed as an Extra Class W3TDH. Is there by any chance a net or military radio users group you folks could point me at. -- Tom