Copper Slim Jim

[Ironman1956]

Here is my copper slim jim which reaches out better than expected over other antennas I have tried. Just wanted to share. Reasonable to build and they do talk well.

 

[Ironman1956]

Here is my copper slim jim which reaches out better than expected over other antennas I have tried. Just wanted to share. Reasonable to build and they do talk well.View attachment 15843

This is not the final installation but just leaning up so I could take the picture.

 

[The DB]

Two suggestions.

If your not already considering using a fiberglass mast for the upper mast section. A metal mast being that close to the antenna and that type of matching section will affect it much more than some people realize. Another option here is using a T connector on the bottom of the stub instead of a right angle connector and add a copper tube extending down from it and use that to attach the antenna to the mast. Try to keep metal away from the upper/stub areas of the antenna as much as possible.

If that coil of what appears to be coax below the antenna is supposed to be a coaxial choke, do some more research on them. A choke of that size wont be effective on two meter frequencies. Be careful as most instructions for this I see on-line are also strangely not effective for 2 meter antennas, although they would work great at some HF frequencies. 6 turns of RG-58 on a 1.5 inch form I know works well, although thicker coax types will have trouble making that sharp of a turn. In general, fewer turns on a given form size will work for higher frequencies, and smaller forms with the same number of turns also work better for higher frequencies...


The DB

 

[Ironman1956]

Two suggestions.

If your not already considering using a fiberglass mast for the upper mast section. A metal mast being that close to the antenna and that type of matching section will affect it much more than some people realize. Another option here is using a T connector on the bottom of the stub instead of a right angle connector and add a copper tube extending down from it and use that to attach the antenna to the mast. Try to keep metal away from the upper/stub areas of the antenna as much as possible.

If that coil of what appears to be coax below the antenna is supposed to be a coaxial choke, do some more research on them. A choke of that size wont be effective on two meter frequencies. Be careful as most instructions for this I see on-line are also strangely not effective for 2 meter antennas, although they would work great at some HF frequencies. 6 turns of RG-58 on a 1.5 inch form I know works well, although thicker coax types will have trouble making that sharp of a turn. In general, fewer turns on a given form size will work for higher frequencies, and smaller forms with the same number of turns also work better for higher frequencies...
I received instructions from a 45 year ham to use what he called a 5X5 using the heavy 400 low loss coax, it serves it's purpose I guess for it works well. I believe with 75 feet of coax out it was worth it to pay the xtra expense and go with this type of coax. That is actually grey conduit which is plastic up there not metal, but it does look like I used metal.


The DB

 

[Ironman1956]

Two suggestions.

If your not already considering using a fiberglass mast for the upper mast section. A metal mast being that close to the antenna and that type of matching section will affect it much more than some people realize. Another option here is using a T connector on the bottom of the stub instead of a right angle connector and add a copper tube extending down from it and use that to attach the antenna to the mast. Try to keep metal away from the upper/stub areas of the antenna as much as possible.

If that coil of what appears to be coax below the antenna is supposed to be a coaxial choke, do some more research on them. A choke of that size wont be effective on two meter frequencies. Be careful as most instructions for this I see on-line are also strangely not effective for 2 meter antennas, although they would work great at some HF frequencies. 6 turns of RG-58 on a 1.5 inch form I know works well, although thicker coax types will have trouble making that sharp of a turn. In general, fewer turns on a given form size will work for higher frequencies, and smaller forms with the same number of turns also work better for higher frequencies...

I used 5 turns, a 5 by 5 the old hams call it.
The DB

 

[Ironman1956]

http://rover.ebay.com/rover/1/711-5...0001&campid=5336136228&icep_item=110943811469

 

[Ironman1956]

That is pvc not metal, do you guys ever say anything good about anything or just elevate yourself to confortable levels on your own terms. Mercy sakes alive,

 

[vkrules]

Well done . Glad it works for you. Ok that's said. DB is right the choke you are using is the wrong size for 2 meters.Check if the cable is radiating .Trying to help, not criticize you

 

[Captain Kilowatt]

That is pvc not metal, do you guys ever say anything good about anything or just elevate yourself to confortable levels on your own terms. Mercy sakes alive,

See why this idiot is now banned. It was simply suggested he use a non-metal mast and from the picture it DID look metal. Instead of simply stating it was PVC he resorted to the typical troll defense of name calling and belittling.

 

[The DB]

That is pvc not metal, do you guys ever say anything good about anything or just elevate yourself to confortable levels on your own terms. Mercy sakes alive,

Wow, did you even bother to read the post I posted in this thread? No you didn't, because if you did you would know that your response has nothing to do with what I said...

I gave you some advice that, for the record, has nothing to do with what your latest post here was about. If you want to argue about this antenna more please keep it in the other thread. There is no need to extend that here.

If you really don't want my advice, ignore it when I give it. Others, however, might be interested. You do realize that you can put me on ignore on this forum, right?


The DB