Fred Jensen wrote: >On 2/10/2012 2:05 PM, Jim Brown wrote: >> On 2/10/2012 1:39 PM, Ken Alexander wrote: > >> Amidon does not make this stuff. They are a distributor of Fair-Rite >> and some other manufacturers, and NOT a good one. I'd bet there's no >> one there who has a clue about anything technical. There USED to be a >> ham there whose name was Amidon, but he's LONG LONG gone, and any >> technical data there is a leftover from his days. > >Many years ago [as in maybe 54], I needed a ferrite core for a 4:1 >balun. DX Engineering hadn't been invented then. I drove over to >Amidon [N. Hollywood/Burbank-ish] which turned out to be a suburban >house. A fellow, who's name was Amidon opened the door, installed me in >a living room filled to the brim with all sorts of boxes and stuff, >rummaged around in a bedroom and finally came up with the toroid core. >He wanted a lot for the core, in fact more than the 16 year old had. He >finally asked me where I had come from, and when I told him S. Central >LA, he gave me the core. > >The balun didn't work, probably because I wound it wrong. I'm really >surprised they are still in business.
Any company handling anonymous grey toroids needs to have perfect stock control... and Amidon still don't. I was sold a large number of #31 toroids which turned out to be #43 material. So if you do buy from Amidon, check the weight! 2631803802 = "FT240-31": 112-114g [1] 2643803802 = "FT240-43": 120-122g [1] 5961003801 = "FT240-61": 104-106g Original data from G3TXQ, since verified from dependable suppliers. [1] The Fair-Rite data sheet says "118.000g" for both of these cores, but in fact the weights of #31 and #43 are distinctly different. -- 73 from Ian GM3SEK http://www.ifwtech.co.uk/g3sek ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
