[TowerTalk] Cable on a reel using a formula?

[Matt Patterson]

Yeah, but what would be the fun in that! LOL

73 Matt
W5LL
----- Original Message ----- 
From: "W7RY" <w7ry at centurytel.net>
To: <towertalk at contesting.com>
Sent: Thursday, October 06, 2005 2:32 PM
Subject: Re: [TowerTalk] Cable on a reel using a formula?


> What about a tape measure and a pencil?  Oh if you want to use paper
> instead of something else you may need paper too.
>
> 73
> Jim W7RY
>
>
> -----Original Message-----
> From: towertalk-bounces at contesting.com
> [mailto:towertalk-bounces at contesting.com] On Behalf Of Matt Patterson
> Sent: Thursday, October 06, 2005 12:05 PM
> To: Pat Barthelow; dolanmorrison at tiscali.co.uk; towertalk at contesting.com
> Subject: Re: [TowerTalk] Cable on a reel using a formula?
>
> Isn't the formula pi * radius(squared) * the number of turns what you
> need?
>
> Been a long time since I did any geometry...
>
>
> Matt
>
>
>
>
> ----- Original Message ----- 
> From: "Pat Barthelow" <aa6eg at hotmail.com>
> To: <dolanmorrison at tiscali.co.uk>; <towertalk at contesting.com>
> Sent: Thursday, October 06, 2005 12:22 PM
> Subject: Re: [TowerTalk] Cable on a reel using a formula?
>
>
>>
>>>How
>>>to calculate the amount of cable on a reel using a formula?
>>>Anybody know this formula.
>>>GM0LZE
>>
>> I used to have an Allied Electronics reference guide from the 60s
>> That had a formula for big audio inductors where the bobbin
>> dimensions(diameter and spool length)
>> the wire diameter were entered and it could calculate inductance,
>> resistance....
>>
>> Hmmm...mebbe a better way...er two better ways...if the cable is newly
>> manufactured, it often
>> has foot or metre markers with  numbers marked on the jacket every
>> foot..look at both ends and subtract...but that  would be too easy..
> so
>> probably not an option in your case...
>> If Coax, and very long, take a good hi res ohmmeter, short one end,
> and
>> measure the
>> loop resistance and look up the factory loop resistance figures for
> that
>> kind of cable..so
>>
>> Maybe some old solenoid design engineering formulas can be had to do
> the
>> trick....
>>
>> Or, Get an MFJ 259B, and connectorize the free spool end, and use the
>> legth
>> function of the 259B to calculate the length to the end...
>>
>> 73, DX Pat AA6EG  aa6eg at hotmail.com
>>
>>
>> _______________________________________________
>>
>> See: http://www.mscomputer.com  for "Self Supporting Towers",
> "Wireless
>> Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041
> with
>> any questions and ask for Sherman, W2FLA.
>>
>> _______________________________________________
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>>
>
> _______________________________________________
>
> See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless
> Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with
> any questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
> _______________________________________________
>
> See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless 
> Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with 
> any questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>