This may be an unwarranted alarm but if it were me, I would increase the value of the RFC in the bias line from 100uh to maybe 1mh. Your resonate frequency with the .02 bypass capacitor is quite low but I suspect a substantial amount of RF current will still be passing through a 100 uh coil and there may be heating especially if the choke is a tightly wound thing on .25 in form.
Good Luck John, WA5BXO -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Thursday, April 30, 2009 8:37 AM To: [email protected] Cc: [email protected] Subject: Re: [AMRadio] Filament choke Here's my schematic so far for the 160m amp: http://www.wd8das.net/160m-GI7B.JPG This one won't be a as pretty as some... I'm going to build it on a steel chassis that has been used by others for at least four other projects and is literally swiss-cheesed with useful holes. (more holes than steel maybe) The front panel is 1/8" aluminum sheet also somewhat holey, but smoothed and now painted nicely with textured gray. The cabinet looks like it came from a later-vintage Meissner Signal Shifter with liftable lid and plenty of ventilation holes. 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 ______________________________________________________________ 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
