[OZAPRS] Newb HF questions ;)

[Ben Lindner-VK5JFK]

Well done Ray. Were you a knitter from way back ? having those needles 
hanging around. Not that there is any thing wrong with that, a lot of 
men knit :-)

Ben vk5jfk

Ray Wells wrote:
> Looks like it's time to get technical, heaven forbid!
>
> I've just measured a typical aluminium knitting needle at 300mm. If we 
> assume it is a quarter wavelength and the length to diameter ratio is 
> 0.96 we can divide 300000 by (1200/0.96) to arrive at 240Mhz. This is 
> a reasonably thin needle so an appropriate adjustment needs to be made 
> for fatter needles. The metal end-cap would add slight capacitance to 
> slightly lower the resonant frequency.
>
> Since knitting needles are usually used in pairs, a dipole would be 
> resonant at about 120Mhz which is great for the aircraft band.
>
> Ray vk2tv
>
>
> Tony King wrote:
>> I had to ask.... What band are knitting needles resonant on??
>>                                        Regards Tony VK3API
>>
>> Ben Lindner-VK5JFK wrote:
>>> "Have you thought about trading in your radios for knitting needles 
>>> :-) "
>>>
>>>
>>> Ray,  I believe that Scrap Booking and Quilting have taken over from 
>>> knitting now. :-)
>>>
>>> Ben
>>> VK5JFK
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