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Old January 27th 07, 06:43 PM posted to rec.radio.amateur.homebrew
John John is offline
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First recorded activity by RadioBanter: Jan 2007
Posts: 6
Default Where does part 97 end and part 15 begin?


wrote in message
oups.com...
John,

So, say I had a CW oscillator on the colorburst frequency. I'll shunt
the output
with a 50 ohm resistor to ground. I'll put a random wire at the top of
the
resistor.

Basic equations yield P = (EE) / R

If R is 50 Ohms and maximum output power is 1.7e-9 watts, then E
is 4.1e-5 volts.

So, would a measurement of 40 microvolts or less across the resistor
be satisfactory?

Thanks,

The Eternal Squire


I think it would be about 300 uV across 50 ohms ( I think you are off by
about an order of magnitude). Yes, I think that would be okay. A good place
to understand this stuff is on the ARRL site. Look into the BPL and RFI
things there. Read everything you can find about this subject. If you
research this thoroughly, you will find allies in the field, I'm sure.

My intent here is not to discourage you in your project, but to encourage
you to think critically. Always ask yourself why this has not been done
before. Most of the time there is a reason, but sometimes (a small
percentage of the time) it is because nobody has had an interest in the
subject.

But, you didn't ask for my philosophy. I sometimes get carried away. I
apologize for that.

Cheers and 73,
John