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Anyone here of a "SLim Jim" antenna?
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Richard Clark wrote:
On 18 Jan 2005 12:52:16 -0800, wrote: I wonder how well these work and if anyone has used them? http://www.hamuniverse.com/slimjim.html For material taken from that site, the spelling is generally an indicator of the quality of reporting: ... considerable gain and this is consentrated almost parallel to ground ... Leaving aside the spelling, the real nonsense is "considerable gain". It looks very like a J-pole, and has a very similar radiation pattern and gain. It is simply a J-Pole, with what the medicos would call "a redundant prepuce." :-) -- 73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB) http://www.ifwtech.co.uk/g3sek |
ISTR designed by G2BCX and published in one of the
Britland "Camm's Comics" about 25 years ago. wrote in message ups.com... I wonder how well these work and if anyone has used them? http://www.hamuniverse.com/slimjim.html |
Ian White, G3SEK wrote: Richard Clark wrote: On 18 Jan 2005 12:52:16 -0800, wrote: I wonder how well these work and if anyone has used them? http://www.hamuniverse.com/slimjim.html For material taken from that site, the spelling is generally an indicator of the quality of reporting: ... considerable gain and this is consentrated almost parallel to ground ... Leaving aside the spelling, the real nonsense is "considerable gain". It looks very like a J-pole, and has a very similar radiation pattern and gain. It is simply a J-Pole, with what the medicos would call "a redundant prepuce." :-) -- 73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB) http://www.ifwtech.co.uk/g3sek So it is basically a j pole? I guess it would perform like one? I am going back and forth and cant decide what to do for two meters. It looked like a fun project. I j=have some 1/2 inch conduit and thought about welding it togther like that just to see how it worked. And installing some stainless steel bolts in the ends to "tune" it. The problem is figuring out how to mount it. It says it has to be insulated and at least 20 inches away from metal. |
I'd suggest one to be moving-coil and the other to be digital.
wrote in message oups.com... I guess it would perform like one? I am going back and forth and cant decide what to do for two meters. |
On 19 Jan 2005 05:26:40 -0800, wrote:
[snip] | |So it is basically a j pole? I guess it would perform like one? I am |going back and forth and cant decide what to do for two meters. Using the same site as a source: http://www.hamuniverse.com/2metergp.html Build this and be done with it. All this stuff about "gain" in a monopole is so much BS. |
On Wed, 19 Jan 2005 08:30:25 -0700, Wes Stewart
wrote: [snip] Using the same site as a source: http://www.hamuniverse.com/2metergp.html Build this and be done with it. All this stuff about "gain" in a monopole is so much BS. Wes, you mean to tell me that you can't hear a whole whopping dB (or less) difference? G Danny, K6MHE |
Wes Stewart wrote: On 19 Jan 2005 05:26:40 -0800, wrote: [snip] | |So it is basically a j pole? I guess it would perform like one? I am |going back and forth and cant decide what to do for two meters. Using the same site as a source: http://www.hamuniverse.com/2metergp.html Build this and be done with it. All this stuff about "gain" in a monopole is so much BS. How would you get it to stand up to winds outside on a roof? |
Have a look at
http://www.johncath.force9.co.uk/omni%202mtr.htm I have a so-called 'professional' Slim Jim obtained (I think) from Sandpiper about 14 years ago and still going string. Although for 2m primarily it is supposed to work from about 130-174MHz. -- Woody harrogate2 at ntlworld dot com |
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