Thanks Wes and thanks all who replied directly . I've received some very
good information. I should be good to go
Ed N5DG
On 7/13/2016 9:45 AM, Wes Stewart wrote:
I have no idea how critical the phase shift is for your design, but
I'll offer a couple of caveats. Unless you have characterized your
cable, you don't know Vf or Zo. Furthermore, both of these vary with
frequency. These effects are probably in the noise and with your
instrumentation you will never know the difference. That said,
finding a phase length at a multiple frequency doesn't necessarily
predict the phase length at the design frequency.
On 7/12/2016 8:04 PM, Ed Stallman wrote:
I'm cutting a 40 degree and a 20 Degree Delay line using RG6 at
1.83MHz for a receive 8 circle array ! I know the velocity factor of
the RG6 and have all the math worked out .
After doing the calculations and trimming the RG6 back , I'm looking
for X=0 at 4.118 MHZ ( or as close to X=0 as possible )
Now to my question: I'm finding the X=0 to be a broad range , looks
to be + - 50 KHz on my MFJ 259b .. I know , I need a better analyzer
... Can I double of quadruple the frequency to narrow the span where
X=0?
Thanks Ed N5DG
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