"Roger Hayter" wrote in message
...

Wayne wrote:

"Ian Jackson" wrote in message ...

In message , rickman
writes
On 9/30/2015 12:57 PM, John S wrote:
On 9/30/2015 10:12 AM, Ian Jackson wrote:
In message , Jeff
writes
On 29/09/2015 14:31, Jerry Stuckle wrote:
On 9/29/2015 4:40 AM, Jeff wrote:


So let's get back to the original question. Was it ever really answered?
I
think it was made slightly more complicated by the fact that the antenna
feedpoint impedance was not purely resistive, but was actually around
20-j130 (at 14 MHz),

Was there any advantage in having the coax paralleled (both for 20 ohms
resistive, and for 20-j130)?

Expanding on the original question.... Antenna feedpoint approximately
20-j130
The ATU drives the antenna through about 15 feet of coax.
Assuming that the ATU provides a +j130 conjugate match, does that leave
the
coax with a SWR of 50/20= 2.5:1?
If so, then I will not bother with considering 2 parallel coax.

# If I'm not mistaken, the aerial impedance will look a bit different at
# the other end of about a quarter wave of coax. But that is probably
# not going to alter your conclusion, just the matching network.

Good point. The impedance will move around the Smith constant swr circle to
something else that will need the ATU conjugate match.

I'll take a better look at the dimensions.

(but going "off the grid" for a while, so it will be a few days)