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Old 22nd January 2012, 12:11 AM   #1
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Default Cathodyne gain calculator link

I think there was a cathodyne gain calculator placed at this link Audio Amateur Incorporated but it seems it's not, now, but I can't remember if it was there or somewhere else. Did anyone see this? I'm interested on ballancing cathodyne ouputs.
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Old 22nd January 2012, 12:32 AM   #2
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was it this one?
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Old 22nd January 2012, 01:35 AM   #3
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afaik, you can treat the cathodyne as a unity gain amp.....
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Old 22nd January 2012, 03:12 AM   #4
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Yes, that's right... but I'm interested on ballancing outputs, depending on tube and resistores I'm using it.
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Old 22nd January 2012, 03:14 AM   #5
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Quote:
Originally Posted by aardvarkash10 View Post
was it this one?
Yeeaah! That could help, I think! Tell ya later
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Old 22nd January 2012, 03:17 AM   #6
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Quote:
Originally Posted by slideman82 View Post
Yes, that's right... but I'm interested on ballancing outputs, depending on tube and resistores I'm using it.
just like the common cathode, you half the plate load resistor to get 2 equal valued resistors, the circuit is inherently balanced....
look here: The Valve Wizard
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Old 22nd January 2012, 01:21 PM   #7
DF96 is offline DF96  England
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Why use a calculator? Gain =1 (actually just below, but close), balance comes from identical loads at each output port. What is there to calculate? (Apart from load lines etc, which are done graphically anyway).
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Old 22nd January 2012, 03:59 PM   #8
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Just want to ballance outputs the best I could, although this is just theory... That XLS file could help, but I think I can't modify any parameter... and I'm not going to use an ECC99.
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Old 22nd January 2012, 04:12 PM   #9
SY is offline SY  United States
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Quote:
Originally Posted by slideman82 View Post
Just want to ballance outputs the best I could
Use matched plate and cathode resistors, then matched grid leak resistors in the next stage. Done, you're in perfect balance.
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Old 23rd January 2012, 01:39 AM   #10
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But cathodyne output it will still be unbalanced... I'm using cathode bias resistor, too
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