[TowerTalk] Chokes, toroids and coax (Oh my!)

[Jim Brown]

On 10/4/2022 9:32 AM, kq2m at kq2m.com wrote:
> Does anyone have any recommendations from whom I should buy these 
> materials?
> 
> I see the 31 material toroids for ~ $9 - 10 if I buy 25 or so

I always buy from industrial electronics vendors like Allied, Newark, 
Arrow. For small purchases, I routinely buy from Arrow, which offers 
free shipping on an order $50 or more of in-stock items.
> 
> RG142, RG179, RG400 vary enormously in price - and possibly also in 
> quality.  I don't know one manufacturer from another.

Harbour Industries is the good domestic mfr, based in VT/QC.
> 
> I would appreciate any recommendations/details as to whom you would buy 
> from (or have bought from) and who you would avoid.

I've always bought on ebay, carefully applying the BS filter between my 
ears.
> 
> Also, what/who would you recommend for small boxes in which to house the 
> toroid?

If you study the Cookbook, you will see that these chokes need to be 
able to dissipate heat, so, if possible, should NOT be placed in an 
enclosure. If they are enclosed, NA6O's excellent lab work has shown 
that they MUST be ventilated, and there is a photo of what he did on 
verticals at N6RO.

73, Jim K9YC