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
