The RG-59/U I am using does in fact have a stranded center conductor.
I am using RG-59/U because I am feeding a vertical (quad) loop on the
vertical side and I am running the coax away at a 90 degree angle. The
lighter/smaller coax is more suited for this arrangement. I didn't
use RG6 (which I actually have) because the reducers for the PL259
and ferrite beads I have don't fit this size coax. I figure for 3.8Mhz
that loss wasn't such a big issue...in addition to the 1/4WL section
of 75 ohm coax is only another 25 feet of 50 Ohm coax to the shack.

-Scott, WU2X



On Aug 21, 1:15 am, Owen Duffy wrote:
" wrote groups.com:



I use RG6 quite a bit for ham work, and the cable I buy uses a HDC
centre conductor. I would avoid CCS for lower HF.

For what it's worth, I looked up the specs on the Carol C5785 that is
locally available at Home Depot here in the States. It's quad-shield
RG-6 and they list the losses down to 1MHz

1MHz .26dB/100ft
10MHz .81dB/100ft
50MHz 1.46dB/100ft

According to your calculator for RG-6/U it should be
.19
.6
1.37

Dan, You didn't say which of the RG6 cables you used. The figures you
quote are very similar to Belden 1189A. In respect of 1189A, note that
the regression model is based on data points from 55MHz to 1000MHz. That
is either because that is what Belden supplied, or it could be that I
excised some low frequency data points that were a bad fit to the model.

Beware of results where the estimate is an extrapolation. (The frequency
range is red when the estimate is an extraplation.)

Owen