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   Home   Help Search  
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 51 
 on: Today at 12:23:37 PM 
Started by K6RQR - Last post by KM1H
Suggestion: Go to home depot and rent the largest hammer drill they have. Make sure the chuck is big enough to fit over the ground rod. At $35 for 4 hours it is worth it.

You can bury a 8' rod in a minute or two. Here in NH its rocky and there is a thin layer of Granite every few feet. I start up a step ladder and almost cant get down it fast enough.

When it is this easy it is easy to put several longs rods in. Just make sure there isnt a septic, gas pipe or buried electrical in the rod's path....

Not in my part of NH where solid ledge is common except in the lowest areas and swamps!!  I hired a dynamite blaster in order to situate the foundation. And the well digger hit ledge at 2' and had to go 600' for water; the joys of living on top of a hill but it is a killer for DX and VHF and above Grin   Some on this hill went to 1500' and came up dry which is why the homes are few and far between.

Almost horizontal is the only way that works for the ground rods here. Guy anchors for the towers were drilled in 8' using a mobile compressor and a 2" diameter drill bit. Then 8' utility company grade rock anchors installed, locked in place, and then epoxy poured in.

Carl

 52 
 on: Today at 12:20:26 PM 
Started by DRBEN - Last post by DRBEN
A recent storm showed me how well an unguyed Hustler vertical can survive high winds. Shortly after I put up a Hustler 5BTV (plus the DXE 17 meter modification), DXE began to recommend putting a reinforcing tube over the first (lowest) section of the antenna. They were selling a fiberglass tube, but I bought an ABS drain pipe locally (and painted it white for UV protection). It was a perfect sleeve for the antenna (for a cost of CA$4.00). Now DXE is selling a strengthened replacement lower section for US$39.00. My recent experience makes me think an ABS or fiberglass sleeve is all you need.

We had a storm in early April with very heavy rain, sustained winds at 80 km/h (50 mph) with frequent gusts to 120 km/h (75 mph) that lasted for about 8 hours. It is extremely unusual at my location to have gusts higher than about 90 km/h (55 mph).

The next morning, I was pleased to see the 5BTV still standing tall and even more surprised when I learned that we had had 120 km/h (75 mph) winds in my neighbourhood. I did have some damage--but not the antenna. The wind tore 5 asphalt shingles off my roof on the windward side near the roof peak. I only found one shingle; it had landed in a hedge about 15 m (50 ft) behind the house. I have no idea where the other four shingles went--gone with the wind. The roof was only 4-1/2 years old.

I would prefer to have a guyed antenna, but my local bylaws have an absolute prohibition against guys of any kind or size. If I ever want to put up a beam, I can go to 11 m (35 ft) but the tower would have to be self-supporting (no guys).

Anyway, that $4 ABS tube probably saved me from the expense and time to repair a 5BTV with a snapped lower tube. However, since I don't climb up on roofs anymore, it cost me CA$160 to get someone to source, pickup and install the same brand and colour of shingles.

 53 
 on: Today at 12:20:24 PM 
Started by KC3NG - Last post by N9CM
Try google 7.200 mhz lots of info (stumbled across that freq myself and stay away from it)...

 54 
 on: Today at 12:12:37 PM 
Started by K6RQR - Last post by W8JX
Usually when setting an array of ground rods the proper spacing is the sum of the lengths of both rods; If you have two, eight foot rods, the spacing should be sixteen feet.

The idea being that the rods should be separate enough that they are outside of the zones of influence of each other to maximize the conduction area to the earth. It is more than just how many square inches are in contact with dirt, it is the entire area around the rod that is forming part of the ground system.

Funny thing is the power company drive one rod straight in fans 3 or 4 more ground rods out  driven at abt a 45 to 60 degree angle from ground level from a central entry point and then ties them together here installing grounds for power pole transformers by houses

 55 
 on: Today at 12:09:35 PM 
Started by K6RQR - Last post by KB6HRT
Bruce,
  There are so many factors in making an antenna system work at a give place to ones satisfaction, one can't name all of them, as you can read everybody has there opinion, as do I,  one thing I know is mother nature is the biggest player in this ball game, the time of the year, time of the day or night, how good or bad conditions are, so on, an so on,  we all are confronted with the same theory, your antennas, installations, types of antennas how high or low the antenna is how much power you think you may need, type of radio equipment you use, it goes on an on an thats what makes HAM radio such a fun hobby, I know very little about
theory these days,  I use basic antennas that have been proven before I was born an work if installed correctly, is there better stuff out there, you bet, I knew a lot more theory when I was a young HAM but is not the case now, because it was not reinforced because it had never served me well when I did, always had to work out the bugs to get the antenna to work well as the starting point, which requires  some tuning anyway. most of the time it was something different as it ended up, unless I was doing a duplication of something I had built an installed before. have healed on to what has worked  for me best as I remember. When I was young and going to school, there was BLACK & WHITE in my middle years there was BLACK GRAY an WHITE now theres now theres Black Gra-a-a-a-a-a-ay & White and I am not sure about that sometimes hmmmmmm. So what does all this extra work give ya maybe 5min on a Rag Chew on both ends MAYBE.
so one has to be into this stuff big time to make it pay a little for ya, so guess I am CRAZY about HAM radio.............73s.......kb6hrt

 56 
 on: Today at 12:09:31 PM 
Started by KC3NG - Last post by KC3NG
There's a lot we can do if we have information ans if we are organized, The bulk of my experience is on 75. I acknowledge my lack of experience on 40. But we have to start somewhere. Cleabing up 7200 would be good for hamdom.

Renee Kc3NG

 57 
 on: Today at 11:55:59 AM 
Started by K6UJ - Last post by KM1H
How many do you wanted tested?  DO you have an amp you want to use these tubes in?  If so, why not install the tubes and test them in the amp?


Hi Lou,

I have an amp I could run them in but I would rather pay and send them out.  I have 5 all used
and want to know if they are good, on their way out, duds, etc. 

Bob
K6UJ

Personally, no reflection on Lou, I would not ship them out to test them because of the chance then being damaged in shipping. They could be good now and bad after two trips through shipping mill....

The 3CX800 family was designed for mobile and aircraft use and Ive even tested a few with dented coolers that were still fine. They are a very rugged tube.

Ive also never even heard of one with an open filament but with hams I suppose anything is possible. Luckily they are not a tube that is popular with CBers due to the grid being easily destroyed by clueless users.

IF you send them out record the date codes and serials plus put a mark in some place not easily visible. Then photograph it all.

Carl

 58 
 on: Today at 11:53:16 AM 
Started by KE2KB - Last post by WI8P
Frank, now that you've had your Hakko for a while, how do you like it?  Mine is going on 3 years old, and never let me down.  I don't regret buying it one bit.  Grin

 59 
 on: Today at 11:50:30 AM 
Started by KM4SII - Last post by W1VT
If you intend to go to college the DXCC award might help you get one of these scholarships.

http://www.arrl.org/scholarship-descriptions


 60 
 on: Today at 11:45:27 AM 
Started by KC3NG - Last post by KD8TUT
I'm serious. What are you referring to in using "sheet show"? I do don't want this thread closed, I want information.

Renee KC3NG

That frequency has been gone for a long time. The FCC doesn't do a *lot* of enforcement these days. Some operators who did bad things on that frequency have been identified by the FCC.

But it's a cesspool which we all tend to spin the dial past.

There's nothing we can do.

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