Ian White GM3SEK wrote: > CUTTER DAVID wrote: > > Some UK suppliers do stock beads in #31 material but mostly not the ones > that interest us. I haven't checked in the past few weeks, but will need
I'm fairly sure that Farnell did some #31 material, bigger than beads, but smaller than typical for amateur radio use. I seem to remember you had to read between the manufacturer's catalogue number to work out it was #31. > to refresh this information in time for the RSGB Convention. I tried writing to the RSGB's EMC contact email addresses a few months ago, enquiring about sources of #31 material (and twisted pair speaker cables in less than whole drums, although I've found the latter and I'm waiting to see if it helps). However the first address I tried bounced and the second one never replied, so I gave up. I think the big problem is one of education. Most people in the hobby believe that toroids are good, but probably don't even realise they have to be ferrite. The RSGB's filter collection doesn't seem to have changed in a couple of decades, and the big traders, presumably successfully, sell EMC toroids without any indication of what they are made from. >> What is going through my mind is how the amateur fraternity could >> persuade a distributor in EU to stock these and the type 31 cores. In terms of the big electronics distributors, you probably have to convince them that there is a large commercial shortwave RF engineering industry in the UK, which may not be true any longer. For the amateur equipment suppliers, you need to educate the market so they refuse to buy anything else. -- David Woolley Emails are not formal business letters, whatever businesses may want. RFC1855 says there should be an address here, but, in a world of spam, that is no longer good advice, as archive address hiding may not work. ______________________________________________________________ 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
