wrote:
Is that the same as a 1/4 ground plane vs 5/8 ground plane?

Yep.

It is just I have seen 5/8 antennas advertised with gain.

They have a slight amount of gain IAOI they have a good ground plane.
The additional gain of a well designed 5/8WL vertical is, IMO, only
important for HF CW DX and QRP digital work.

On another topic, Would it be bad to use RG6 for the antenna and radio?

"Bad" is relative. RG6 is 75 ohms. When I was in high school, RG6 &
RG11 were very popular. If a center-fed dipole has a feedpoint
impedance of 73 ohms, then 75 ohm coax results in a very low SWR
on the feedline. The mismatch, is this case, is at the source
and is not anything to worry about. Of course, your SWR meter,
calibrated for 50 ohms, will not display the correct SWR on the
75 ohm coax. In the '50's, if our transmitter's pi-net output
would "load", our system was working just fine. Most of us didn't
even own an SWR meter back then.
--
73, Cecil http://www.qsl.net/w5dxp


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