[Antennas] questions
Jaap de Jonge
[email protected]
2003年3月10日 21:06:44 +0100
I hadn't tested that setup yet, but I quickly did. Grabbed a piece of
RG-58 lying around and quickly wound a 6 turn 6" dia coil. If I attach
the braid on both ends to my RF Analyst (using 2 inch leads), this is
what I measure:
F Z
1.80 Mhz 130 Ohm
3.65 Mhz 293 Ohm
7.15 Mhz 1238 Ohm
14.20 Mhz 761 Ohm
29.00 Mhz 191 Ohm
Between 8.10 Mhz and 10.70 Mhz the Z reads 'H' (High), which means
higher than what the RF Analyst can measure.
Hope this helps...
73
Jaap
PA8DX
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Lefczik, Larry D
Sent: maandag 10 maart 2003 18:46
To: [email protected]
Subject: RE: [Antennas] questions
How did this compare to the 6 turns of coax? What there the
measurements for that?
ldl- I measured a 10 bead
ldl- choke with my
ldl- Autek RF Analyst and it shows an impedance of a few
ldl- hundred to more than
ldl- a thousand ohm, depending on the frequency, so it should
ldl- work for this
ldl- purpose. And at a fraction of the price of a commercial balun!
ldl-
ldl-
ldl- I am getting ready to put up a Cushman A743 I picked up. The
ldl- instructions call for 6 loops of coax 6" in dia at the
ldl- antenna feed
ldl- point. I have heard it is better to slip some ferrites on the coax.
ldl- Advise? Opinions? Suggestions? Lloyd Godsey KK7IZ 1315 N.
ldl- Udall Circle
ldl- Mesa, Az 85203
- - -
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