Members LaXu Posted February 19, 2009 Members Share Posted February 19, 2009 Great read. I felt like I really learned a lot from this, far more than I did on those damned electronics theory courses I had several years ago... Link to comment Share on other sites More sharing options...
Moderators Kindness Posted February 19, 2009 Author Moderators Share Posted February 19, 2009 far more than I did on those damned electronics theory courses I had several years ago... Maybe that was their hope too! Link to comment Share on other sites More sharing options...
Members Casey4s Posted February 20, 2009 Members Share Posted February 20, 2009 Nice thread Link to comment Share on other sites More sharing options...
Moderators Kindness Posted March 16, 2009 Author Moderators Share Posted March 16, 2009 I just found this which might be interesting for those that are more visual learners: WnZRJjmOZb8 Link to comment Share on other sites More sharing options...
Members RSBro Posted March 16, 2009 Members Share Posted March 16, 2009 Will it give me teh Brootalz tonezz? If not, go away t00b boy... :poke::poke: Link to comment Share on other sites More sharing options...
Members Decker Posted March 16, 2009 Members Share Posted March 16, 2009 Excuse my nitpicking, but that's not a choke input supply in the schematic. It is a cap input filter, because the 32 mfd cap is before the inductor. If it was a choke input PS, the choke would be before the first 32 mfd capacitor, and before the connection to the primary of the output transformer. And there would be a second choke after the first capacitor. A true choke input filter would reduce ripple in the B+ significantly, but would also drop the B+ more than a cap input filter, and maybe too much for our use. FWIW, the performance of a choke filter can be improved by adding a capacitor in parallel with the inductor. The size of the capacitor is determined by the formula C= 1/567913 x L where L is the value of the choke in Henries. Link to comment Share on other sites More sharing options...
Moderators Kindness Posted March 16, 2009 Author Moderators Share Posted March 16, 2009 Excuse my nitpicking, but that's not a choke input supply in the schematic. It is a cap input filter, because the 32 mfd cap is before the inductor. If it was a choke input PS, the choke would be before the first 32 mfd capacitor, and before the connection to the primary of the output transformer. And there would be a second choke after the first capacitor. A true choke input filter would reduce ripple in the B+ significantly, but would also drop the B+ more than a cap input filter, and maybe too much for our use. FWIW, the performance of a choke filter can be improved by adding a capacitor in parallel with the inductor. The size of the capacitor is determined by the formula C= 1/567913 x L where L is the value of the choke in Henries. Excellent! I'll look at that. I noticed a few days ago I called the EL34s beam tetrodes when they are in fact pentodes. I need to revise that section as well. Link to comment Share on other sites More sharing options...
Members Cliff Fiscal Posted March 16, 2009 Members Share Posted March 16, 2009 Wow....great thread......I love JTMs! Will be reading again! Link to comment Share on other sites More sharing options...
Members Thumper Posted March 17, 2009 Members Share Posted March 17, 2009 You're such a nerd, Patrick... Link to comment Share on other sites More sharing options...
Moderators Kindness Posted March 17, 2009 Author Moderators Share Posted March 17, 2009 You're such a nerd, Patrick... Banninated! Oh wait, you're right. Nevermind. Link to comment Share on other sites More sharing options...
Moderators Kindness Posted March 25, 2009 Author Moderators Share Posted March 25, 2009 Excellent! I'll look at that. I noticed a few days ago I called the EL34s beam tetrodes when they are in fact pentodes. I need to revise that section as well. Both sections revised. Link to comment Share on other sites More sharing options...
Members BottomHeavyKate Posted April 17, 2009 Members Share Posted April 17, 2009 I wonder how many times I'm going to have to read this before it starts to sink in Link to comment Share on other sites More sharing options...
Members bassman1956 Posted April 17, 2009 Members Share Posted April 17, 2009 I wonder how many times I'm going to have to read this before it starts to sink in Kate, are you building one? Link to comment Share on other sites More sharing options...
Members BAXANDALL Posted July 19, 2009 Members Share Posted July 19, 2009 I think my head is going to explode! Link to comment Share on other sites More sharing options...
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