[AMRadio] coils


Edward B Richards zuu6k at juno.com
Sun Jan 8 23:19:31 EST 2006


Thanks, John.

73, Ed Richards K6UUZ
Simi Valley, Ca 93065
Home of the Air Force 1 pavilion

On Sun, 8 Jan 2006 21:21:34 -0500 (EST) John Lawson <jpl15 at panix.com>
writes:
> 
> 
> >
> > ----- Original Message ----- From: "Edward B Richards" 
> <zuu6k at juno.com>
> >> 
> >> I am going to wind a pi section tank coil from 1/4" copper 
> tubing
> >> tomorrow. Mine will be 4" in diameter and 3" in diameter. Which 
> tubing is
> >> best (no kink) thick or thin? Thanks.
> 
> 
>    A trick to making smooth bends in soft metal tubing, is to fill 
> it with 
> fine sand first.
> 
>    Now - I understand this can be tedious with long lengths of 
> small-diameter stock, but if you have no other mandrels or fixtures 
> to 
> wind it on, sometimes this can help from developing a kink in the 
> pipe.
> 
>    Then, you can blow the sand out, or just leave it in there - 
> won't hurt 
> the electrical specs of the coil...
> 
>    Cheers
> 
> John  KB6SCO
> 
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