Re: [TowerTalk] 40-2CD

[K4SAV <RadioIR@charter.net>]

I counted 66 turns on my XM240 coils.  Maybe that's the reason I had a 
lot of trouble getting it to go low enough in frequency.

I would expect to see some kind of difference, either element length or 
coil turns, between the XM240 and 40-2CD.  That U shaped support channel 
used on the XM240 significantly increases the effective diameter of the 
element, for the length of the channel.

Jerry, K4SAV

Doug Renwick wrote:

> Historically it would be best to replace the self taping SS screw and
> replace it with a bolt.  I drilled the hole through with a 5/32" bit,
> and used a 6-32 x 1 1/4" SS bolt and filed the bolt flush to the surface
> of the nut.  I put a #6 SS flat washer on the coil and a star washer at
> the nut.
>
> On my XM240 coils I counted 67 turns.  Some have reported counting 68
> turns.  Does anyone know if there was a design change or was this a
> difference between the 40-2CD and XM240?
>
> Doug
>
>  
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