At 02:41 PM 11/16/02 -0500, k4oj wrote:
>>Put 1000 watts on the Quad and you have apprx. 900 watts. Put 1000
>>watts on the same Yagi and you have aprrx 500 watts out. The power is lost
>>in resistive heat.
Seems like I recall that an erstwhile towertalk regular reported a few
years ago testing a KT-34XA trap in a homemade calorimeter to measure the
loss actually dissipated as heat. The number he came up with was very much
less than would be implied by a 50 percent overall efficiency. I don't
believe he was arguing that the KT-34XA trap design was that much better
than others, just that claims of 3 dB loss in trapped antennas were
probably badly overstated.
I don't suppose anyone needs to be reminded that Antenna Mart is a quad
manufacturer.
73, Pete N4ZR
Sometimes a tower is just a tower
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