[OZAPRS] Newb HF questions ;)

[Ray Wells]

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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