Glad to see you clarified the terminology! I specificaly said Imperial and someone started talking about "English"
BA is actually Metric simply because in spite of it's name it was a thread invented in the 1880's (approx) by Swiss clock makers. a easonably fine thread with steep sides in order to give better strength in thin metal . Think about it - it makes sense. Regreftfully they are very hard to get these days as I have found to my chagrin in my key building hobby. British threads per se were BSF, British Standard fine and Whitworth a course thread ideal for Cast iron or soft metals. With minor differences that has the same thread pitch as UNC except for half inch. But due to a shaping of the top of the apex they are not always reliably intercahngeable. There is more to it but not worth the details on this forum. David VK3DBD/G3SCD. On Sun, May 9, 2010 at 7:15 PM, Bob <k...@att.net> wrote: > If it was an "English size" small screw would it not be in the BA > (British Association) standard thread form? > > But BA was metrically devised. > > 73, > Bob > K2TK > > > > > > There is a difference between "English size" and "Metric size" > > standards. In my experience, the K2 main knob uses a 5/32" hex > > key (a.k.a Allen wrench) with no problems. Didn't have to trot > > out my Metric tools. > > > > > > > ______________________________________________________________ > 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 > ______________________________________________________________ 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
