Cathodyne gain calculator link

slideman82 · 22nd January 2012, 12:11 AM

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.

aardvarkash10 · 22nd January 2012, 12:32 AM

was it this one?

Tony · 22nd January 2012, 01:35 AM

afaik, you can treat the cathodyne as a unity gain amp.....

slideman82 · 22nd January 2012, 03:12 AM

Yes, that's right... but I'm interested on ballancing outputs, depending on tube and resistores I'm using it.

slideman82 · 22nd January 2012, 03:14 AM

Quote:

Originally Posted by aardvarkash10

was it this one?

Yeeaah! That could help, I think! Tell ya later

Tony · 22nd January 2012, 03:17 AM

Quote:

Originally Posted by slideman82

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

DF96 · 22nd January 2012, 01:21 PM

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).

slideman82 · 22nd January 2012, 03:59 PM

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.

SY · 22nd January 2012, 04:12 PM

Quote:

Originally Posted by slideman82

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.

slideman82 · 23rd January 2012, 01:39 AM

But cathodyne output it will still be unbalanced... I'm using cathode bias resistor, too

22nd January 2012, 12:11 AM	#1
slideman82 diyAudio Member Join Date: Oct 2007	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.

22nd January 2012, 12:32 AM	#2
aardvarkash10 diyAudio Member Join Date: Mar 2007 Location: Auckland, NZ	was it this one? __________________ Yes, conservatism thrives on low intelligence and poor information. But the liberals in politics... continue to back off, yielding to the supremacy of the stupid. It's turkeys all the way down. - George Monbiot, guardian.co.uk, 6 Feb 2012

22nd January 2012, 01:35 AM	#3
Tony diyAudio Member Join Date: May 2003 Location: Palatiw, Pasig City	afaik, you can treat the cathodyne as a unity gain amp..... __________________ http://www.electronicslab.ph/forum/i...?topic=32688.0

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22nd January 2012, 03:12 AM	#4
slideman82 diyAudio Member Join Date: Oct 2007	Yes, that's right... but I'm interested on ballancing outputs, depending on tube and resistores I'm using it.

22nd January 2012, 01:21 PM	#7
DF96 diyAudio Member Join Date: May 2007	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).

22nd January 2012, 03:59 PM	#8
slideman82 diyAudio Member Join Date: Oct 2007	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.

23rd January 2012, 01:39 AM	#10
slideman82 diyAudio Member Join Date: Oct 2007	But cathodyne output it will still be unbalanced... I'm using cathode bias resistor, too

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