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Re: [TowerTalk] Cutting a FT-240 type 33...in half ??

To: "Tower and HF antenna construction topics." <towertalk@contesting.com>
Subject: Re: [TowerTalk] Cutting a FT-240 type 33...in half ??
From: "Ron W8RJL" <youngron@verizon.net>
Date: Tue, 10 Feb 2015 02:14:59 -0500
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Last time I tried to saw a core it wiper the teeth right off a hack saw blade. Maybe it was a bad blade? Tried another, then gave up.
Ron W8RJL

----- Original Message ----- From: "Jim Thomson" <jim.thom@telus.net>
To: <towertalk@contesting.com>
Sent: Tuesday, February 10, 2015 12:55 AM
Subject: [TowerTalk] Cutting a FT-240 type 33...in half ??


Ok, I have a requirement where an additional one or two x 2.4 inch OD, type 33 cores needs to be added to an existing choke balun. Since each end of the RG-393 silver plated + teflon coax is already silver soldered to a 7-16 DIN connector at each end of the nema box, I would rather not have to take the entire assy apart. Major pita. 393 coax has TWO silver plated braids, and in this case, each of the braids has been carefully separated at each end, and each braid is silver soldered to a lug, that is bolted to the 7-16 din connector flange, via the SS 8-32 machine screws. IE: 2 of the 4 corners of each 7-16 din female coax connector gets a braid attachment.

Can a 2.4 inch OD, 1.4 inch ID, type 33 toroid be cut in half, edges sanded, then placed around the existing 4-5 turns of 393 coax, then held together via glue, ty-raps, both, or some other method ??? I have an excellent H-V bandsaw, made for cutting steel, hard steel, and AL. IE: 80-120-200 ft per minute. It would slice through a toroid very quickly. If what I propose is feasible, it would save me a lot of grief. I already checked, and the big, type 43 snap on types will not fit, since they only have a 1 inch ID.

Tnx...... Jim   VE7RF



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