From reading past messages from 2007, the FC-30 by B&W doesn't have enough inductance for 160M. The specs are from 3.5MHz and up.
You'd be better off checking some of Orr's Handbooks for the correct ferrite rod and wind your own. I know I have a home-wound one here, BUT - I don't know if it would work for 160M. I didn't build it. Bob - N0DGN [email protected] wrote: > I'm building a 160m grounded-grid amp around the GI-7B tube > (it worked so well in my SB-230 retrofit project: > http://www.wd8das.net/SB230.html ) > > Anyone know of a source for a filament choke appropriate for this tube? > The filament draws only 2 amps, so the 30-amp ones I see available > online are really overkill (and awfully large). But for 160m I'm > thinking that a somewhat higher inductance than might normally be used > for 80-10m amps might be in order. Say >50 uH?. Bifilar-wound would > be best, but two separate chokes would probably work too. > > Should I not find a ready-made source, then I guess I could make one if > I find some ferrite rod suitable for use at 1.9 MHz. > > Thanks... > > Steve WD8DAS > > [email protected] > http://www.wd8das.net/ > --------------------------------------------------------- > Radio is your best entertainment value. > --------------------------------------------------------- > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Searchable Archives: http://www.mail-archive.com/[email protected]/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: [email protected] > To unsubscribe, send an email to [email protected] 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 > > -- Bob - NØDGN ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/[email protected]/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: [email protected] To unsubscribe, send an email to [email protected] 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
