K7ITM wrote:
On 5 Apr 2007 09:49:52 -0700, "K7ITM" wrote:
So for small diameter 50 ohm polyethylene dielectric line at 1.8MHz,
the worst case for most ham applications, Xo/Ro is about .18. For
that, I used 2.7dB/100ft for RG174 type line.

Interestingly, the attenuation of RG174 (because of the thin copper on
the copperweld inner conductor) is relatively constant with
frequency.

Owen's transmission line calculator gives the Z0 of RG-174
as 50.13-j3.59 at 1.8 MHz. That's an X0/R0 ratio of about
0.07, not 0.18.
--
73, Cecil, w5dxp.com