There is a great article on how to use power transformers like that - as a mod transformer - available on line for free - by Tim, WA1HLR
I hope it helps you - http://www.amwindow.org/tech/htm/tvtomod.htm LEE, W0VT writes: > I went to Lowe's this evening and picked up some oak lumber to build up some > "Slat Board" > Transmitters. (They sell oak down to 1/4 inch thick to be used for the > "slats". I plan to screw the > slats to the main oak end panels with brass screws and then stain and > polyurethane the wood. I > plan to build up one chassis as a 6V6 oscillator with pi-net. Another with a > 6AG7 with pi-net. > Then compair the output of the two plus check crystal current on both of > them. Then I plan to > build up another one with a 6AG7 osc and 6L6 amp with pi-net and plug in > coils. Then I plan to > build power supplies for these on slat board chassis and maybe use 5R4 > rectifiers as I have some > of these around here. Then maybe a modulator for the 6AG7/6L6 rig. For a > modulation > transformer I am thinking of trying a 70 volt or 25 volt line transformer > or/and a power transformer > having it's core "restacked" in E and I configuration with a gap between the > two. The projects > won't cost much and I think they will be great looking. I'll use broadcast > band variable caps in the > pi networks. (Duals for loading and singles for the tank circuit.). Maybe use > some rigid clear > plastic tubing over old tube sockets for the plug in coils. > > Lee, w0vt > ----- Original Message ----- > From: Charlie , W5COV > To: [email protected] > Sent: Wednesday, September 23, 2009 9:04 PM > Subject: GB> Seventy Fiver > Group , the topic came up a while back with thoughts of building a 75 > meter version > of the Twoer etc. Heath line . > > Did it fall by the way , because of a lack of interest , or did anyone do > any type of > development on something like this ? > > I am ALWAYS looking for a glowbug project to build , that isn't real > complex and > won't break the bank. > > A transceiver to put on the air would be a nice project . I have a bench > overflowing > with homebrew transmitters , mostly CW . > > Being on a fixed income , I like projects that parts can be readily > obtained for at > cheap prices . > > With my medical problems , I lack the design ability , that I used to > have . The > medications and disease cause a technical medical term called "brain fog" > . > > So I depend HEAVILY , almost exclusively ,on other peoples designs . > > So if you know of a simple transceiver design that glows and is AM , > please point me > to it . > > Thanks for allowing me to be a part of the best group I belong to !! > > 73, > > Charlie , W5COV ______________________________________________________________ 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
