On Mon, 30 Aug 2010 20:02:09 -0700 (PDT), Chuck - AE4CW wrote: >I've recently been using snap-on Fair-Rite part number 0431176451. It has >impedance characteristics very similar to the largest snap-on (1" opening) >but with a 0.7" opening and about 40% the cost. Arrow had them for less >than $6 but is out of stock now. It plenty big enough for multiple turns of >smaller cables including RG-8X. Have you tried this one?
I don't recall for sure if I measured that particular core, but I have measured at least one core a bit smaller that the "biggest" and it performs quite well, and is quite suitable for the uses you suggest. The important things are the length (you want it long) and the diameter (you want to be able to get enough turns through it). One of the cores I recommend for group purchases is one that is about 0.5-in i.d., primarily because it's a good fit for winding multiple turns of noisy computer and power supply cables through it. So yes, as long as you're sticking with #31 material for the low HF bands and either #31 or #43 for the higher HF bands and VHF, you're in good shape. 73, Jim Brown K9YC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
