...what will the impedance be for the following antennas?
I'll comment on some of the "easy" ones, but don't forget to include the effect
of the impedance transformation on the feedline as well as any changes in the
impedance due to common mode currents.
1; DipoleRoughly 40 to 100 ohms, depending on height above ground, etc.
2; 135 ft flat top wire on various bands.varies widely, typically high (thousands of ohms) when the antenna is a multiple
of 1 wavelength long.
4; 2 element full size horizontal beam for frequency of choice at .15wl spacing. depends on the tuning of the elements. Typically adjusting for higher gain
means a lower feedpoint impedance. Probably in the 10 - 50 ohm range.
7; Quad loop with average height at 60% on top element for band of choice. That isn't a very clear description. A single full wave loop is typically in the
90 to 130 ohm range, but it depends on the configuration: a tall skinny loop fed
at the bottom can be 50 ohms or less, while fed in one side it may be 200 ohms.
8; 80 Horizontal loop on various bands.Varies a lot, depending on the configuration and what part of the 80m band you
tune it for. On those bands where it is a full multiple of 1 wavelength, it will typically be
around 80 to 90 ohms on 80m increasing to around 400 ohms on 10m.
10; Inverted L with substantial ground radial system.Totally depends on the dimensions.
11; End fed 135 ft at design band of choice. On the bands where it is a multiple of 1/2 wavelength, it will have a high
feedpoint impedance (couple thousand ohms or so), but that will depend on
what it is fed against. On 160m it is probably in the 20 - 50 ohm range.
12; 43 ft vertical on various bands.varies widely. http://www.vk1od.net/antenna/multibandunloadedvertical/index.htm