I googled 'flexible conduit' and what I see looks like BX cable -- made out of a single
flat piece of metal wrapped in a spiral shape. If this is what you are talking about, it
would be AWFUL for this purpose -- it would have a very high RF resistance and so be very
inefficient. There are very high currents in the loop and you have to keep the resistance
at RF as low as possible -- that's why large-diameter copper tubing is good.
Do you have a link to a picture of the stuff you are looking at?
On 5/20/2013 6:43 PM, Bill Blomgren wrote:
I saw the great writeup on the magnetic loop antenna and the inventive High Voltage
capacitor for tuning the thing. I'm looking at one of them strictly because I'm stuck in
an apartment.
The fact it should be good for 100 watts is perfect for what I'm looking at
buying.
I'm just wondering about the copper pipe used for the outer loop... I spotted some very
reasonably priced flexible conduit that could be used for the "loop" proper. Do what is
necessary to bond the capacitor into the rig, and it would appear to be a reasonable
alternative to the rather pricy copper pipe. (They want your first born here for that,
and the thieves are busy collecting anything that isn't nailed down.
Thoughts on that for its larger diameter, which should help with the coupling to the
rest of the world...
--
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/
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