"Jeff Liebermann" wrote in message
...
This is more fun:
http://802.11junk.com/jeffl/antennas/connector-loss/index.html
Just take every connector that you can find, put them in series, and
measure the loss. In this case, it was done at 2.4Ghz and 450MHz. End
to end loss at 2.4GHz was 2dB for about 25 adapters or about 0.08dB
per adapter. At 250MHz, the loss was about 0.2dB or 0.008dB per
adapter.

I've done similar demonstrations using two wattmeters at the local
radio club meeting. The results are typically that the adapter string
has the same loss as an equivalent length of small coax cable. I had

I have done something similar. Hook all the adaptors I could find to my hp
8924c and sweep from 30 to 1000 mhz (limit of the equipment). Not much loss
at all.

Best demonstration is to apply power. Even at 1 db of loss and running 1 kw
you would have over 100 watts of heat. Enough to burn your hand in a few
seconds.

The only way I have seen demonstrared is when the connectors creat an
impedance bump and it may take a couple of them in series so the effects
multiply much greater than just adding the losses.
They may have to be a certain ammount of wavelength apart for this to hapen.
The effect is that you have a long piece of coax with a very high SWR.



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