[TowerTalk] Can type 31 cores be cut in half ?

[Richard Solomon]

Sounds like a lot of work. Wouldn't
be easier just to make a new one
and keep the old one for testing
or ??

73, Dick, W1KSZ

On Tue, Jul 5, 2016 at 8:56 AM, Patrick Greenlee <patrick_g at windstream.net>
wrote:

> A tile saw with diamond blade and water flow on the cut such as tile
> installers use is available in different styles inexpensively from Harbor
> Freight.
>
> Patrick        NJ5G
>
>
> On 7/5/2016 8:58 AM, Grant Saviers wrote:
>
>> Yes it is possible with a diamond saw in a surface grinder. However, it
>> is very messy and and the dust/slurry is very abrasive so the grinder owner
>> may say "no way".   We machined a lot of ferrite many years ago for
>> recording heads and pretty quickly the grinders were trashed.
>>
>> You need very flat and smooth mating surfaces (see a big clamp on) as
>> this mating changes the magnetic properties of the core by inserting an air
>> gap.  Obvious it can be made to work since #31 clamp ons are very effective
>> if kept tightly closed.  A tungsten carbide blade will cut ferrite in your
>> bandsaw but I think the cut will be so rough as to be useless. A diamond
>> blade in a cut off saw may work if it last long enough without water
>> cooling.
>>
>> I think you need a bigger NEMA enclosure as any of these techniques will
>> cost a lot more with probably poor results.
>>
>> Grant KZ1W
>>
>> On 7/5/2016 6:05 AM, Jim Thomson wrote:
>>
>>> I have a one off application where I  want to get  1-2  additional 2.4
>>> inch OD cores
>>> onto coax,  but dont want to take the existing CMC assy all apart.  The
>>> big clamp
>>> on is aprx  1.5 inches long..and is too long for this application.
>>>  It’s a tight squeeze inside the
>>> nema box, and  coax is already  silver soldered at both ends  to both
>>> connectors.  Dual silver
>>> braids have been separated at each end of the  RG-393 coax, and bonded
>>> to 7-16 Dins.
>>>
>>> Can a  type  31  2.4 inch OD core be cut clean in half....like in a
>>> bandsaw ?   I have a
>>> vertical bandsaw with a metal cutting blade in... with 3 x speeds,
>>> 80-120-200  feet per
>>> minute.   The idea here was..IF a core can be cut in half, to place the
>>> 2 x halves back around the
>>> coax turns... and then either glue em back together..or  perhaps use a
>>> ty-rap  around the circumference.
>>>
>>> If cores cant be cut,  I will have to disassemble the entire assy, and
>>> start from scratch, which Id
>>> rather not have to do, pita.
>>>
>>> Jim   VE7RF
>>> _______________________________________________
>>>
>>>
>>>
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>>
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