[Antennas] Ladder line use with beams

2002年1月24日 23:56:04 -0500

Ar Home Depot, you can get a 25 ft coil of 1/2 inch dia plastic tubing 
(translucent, looks like polyethylene) meant to be used as the water line 
for the refrigerator's icemaker. I bet it would make good open wire 
insulators. I don't use the stuff, or I would try it myself. Pretty cheap 
to try it - 25 feet for less than 2ドル.
Jerry W4UK
At 10:08 PM 1/24/2002 -0500, you wrote:
>>As for 'low-loss', homemade open-wire .. the worst spacers are probably
>those wooden sticks, boiled in parafin .. the best are probably ceramic
>[terribly fragile and costly], but you can manufacture some excellent
>spacers from small diameter teflon or delrin tubing. Another choice is
>those 'clear-plastic' tubes that are used to ship/store high-quality
>bits for boring machines. They are about 5" long and .5" in diameter.
>If there is a machine shop near you, it can't hurt to find out if they
>throw those plastic tubes away or save them in a 'barrel' .. [that's
>where I found mine!]. BTW, those tubes also have end-caps that work
>super on .5" element tips!
>>Good luck!
>Don
>N8DE