Peter Voelpel wrote:
>It will not take much power to get way more then 1A through a piece of
>copper wire in a RF tuned system.
>>From my experience, soft soldered connections won´t last long when outside
>and when the solder joint is not weather proof protected.
>
>73
>Peter
>
>
>
>Jim Miller KG0KP wrote:
>
>
>
>>Now we mix Tin(60)/Lead(40) and get 10.6 microhms per centimeter. Now
>>the distance we are talking about is NOT 1 cm. Not even one mm but
>>lets use that anyway ( more like 0 to 1/10 mm). So, we have 1.06
>>microhms. Now it will take approximately 1,000,000 volts to get an
>>amp at that point.
>>
>>
More like 1000 amps to get one watt dissipated in a 1 microhms
connection (I^2*R)[voltage drop would be 1 millivolt across the 1
microhm joint]. With 1000 watts of drive you would need a system
impedance of 1 milliohm to get 1000 amps flowing. That's an impedance
ratio of 50,000 relative to the amplifiers output impedance.
A cold solder joint seems more likely. I may be wrong, but it seems like
you'd have to work really hard on a low-impedance transformer design in
order to get 1000 amps flowing from a 1KW 50 ohm source.
73 Mike, W4EF...................
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