You can still get B&W inductor stock at Surplus Sales of Nebraska. But it is getting limited.
Bob Macklin K5MYJ Seattle, Wa. "Real Radios Glow In The Dark" ----- Original Message ----- From: "JAMES HANLON" <knjhan...@msn.com> To: <dle9480...@aol.com> Cc: "AMradio" <amradio@mailman.qth.net>; "james_millen_society" <james_millen_soci...@mailman.qth.net> Sent: Tuesday, January 12, 2010 9:50 AM Subject: [AMRadio] Millen Coil info > Darryl, > > Congrats on finding some nice pieces of Millen gear. You might enjoy > visiting the James Millen Society web page at > http://www.isquare.com/millen/millen-page.htm<http://www.isquare.com/millen/millen-page.htm> > . > You would also be welcome to join the group. > > You could certainly use standard B&W Junior (75 watt) coils for the 90800 > exciter, but you'll need to make new jack bars for them. I have used a > bar made from "Plexaglass" or whatever we are calling it these days. I've > used banana plugs with the leaves stripped off leaving just the center pin > for jack bar pins. The same size coil is used in both the 6L6 plate and > the 807 plate position. > > All of the coils are 1.5 inches inside diameter. > > The 80 meter coil, Millen number 43082, is 2 inches long and has 40 turns. > It has a 7 turn link on the "B+ end" of the coil. > > The 40 meter coil, Millen number 43042, is 2 inches long and has 22 turns. > It has an 8 turn link. > > The 20 meter coil, Millen number 43022, is 1.5 inches long and has 9 > turns. It has a 2 turn link. > > The 40 meter 6L6 cathode coil is wound on a 1 inch diameter form, is 3/4 > inches long, and has 8 turns. > > I don't have a Millen 80 meter cathode coil, but I made my own from a pice > of B&W Miniductor. It is about 3/4 inches in diameter, 1/2 inch long, and > has 16 turns. > > If you have a grid dip meter, you can check the resonance points for the > cathode coils as plugged in to the transmitter. The 80 meter coil should > resonate between 80 and 40 meters, around 5 mc would be good. The 40 > meter coil should resonate between 40 and 20 meters, around 10 mc would be > good. > > I use a series string of five 9-volt transistor radio batteries for the > required 45 volt bias. > > I'm not lucky enough to have a 90881 amp, but I will copy this message to > the James Millen Society reflector. Perhaps one of the JMS guys will be > able to give you coil information for the amp and for the 90800 exciter on > 10 meters. > > Have fun! > > Jim, W8KGI > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: AMRadio@mailman.qth.net > To unsubscribe, send an email to amradio-requ...@mailman.qth.net with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
