Hi all - I am in the process of doing some station layout changes and
some recabling in the process. Just for the heck of it, I pulled
an old (maybe 20 years?) 20 ft length of a no-name, foam dielectric
RG8/U jumper that went between my Top Ten relay box and wattmeter, and
put it on my Autek RF-1 to check for losses.
Following Autek's instructions, I tuned for minimum Z. At 28 Mhz,
according to their formula, my loss was 1.3 db and at 7 Mhz it was 0.7
db! I used the formula 0.17 x Z = loss in db (for 50 ohm coax). This
seems awfully high, or does it?
It is old coax, but only 20 ft long. Does it really deteriorate like
that being indoors the whole time? Or is that formula not correct?
73 Barry
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Barry Kutner, W2UP Internet: w2up@itw.com
Newtown, PA Frankford Radio Club
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