|Author:||stringtheory (registered user: 10 posts )|
|Date:||Wed, Jun 20th, 2012 @ 18:34 ( . )|
Hello fellow tonehounds. I have a newbie question that I need an answer to and hope one of you will help me out. I've googled this a bunch and can't quite get the answer I'm looking for although it could have been there and I missed it.
My question. For example let's say that two 6L6 tubes are looking for 3.4k ohms at the primary of the output transformer which has 4 8 and 16 ohm taps for the speaker or speakers to connect to. Does each tap have the same turn ratio so that if I choose the 4 ohm tap I can use a 4 ohm speaker and likewise for the other two taps so that each tap will reflect 3.4k at the primary if in fact the correct output transformer was chosen.
Or does just one of the 3 taps reflect the correct turns ratio for 3.4k on the primary and I have to figure out which tap (4,8 or 16 ohm) actually reflects the correct impedance at the primary and then get the correct speaker ohm rating and hook that up to the matching tap? Does each tap reflect the same turns ratio and I just have to match speaker ohm to the corresponding tap and can use any speaker I want as long as I hook it to the right tap or do I have to choose the correct tap because each tap reflects a different turn ratio and then choose the correct speaker ohm rating for that particular tap?
I apologize if this is beneath the threshold of good question asking but I need to get this right. I know the power tubes are looking for the correct primary impedance for power transfer but how to do it correctly is my dilemma. Especially if I use different power tubes by connecting pin 1 up correctly so that different octal tubes can be used since I have a beefy PT that can handle the demands. Please excuse my tube newbiness. Any help would be appreciated.
--* impedance match
6/20/2012 @ 20:01--JeffW
6/20/2012 @ 20:02--Chris A
6/21/2012 @ 15:44--boblove
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