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.
was it this one?
Yeeaah! That could help, I think! Tell ya later
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
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.
So, I'd have to match grid bias resistors, and...?
Match cathode and plate resistors of the cathodyne and the grid leak resistors of the stage it's driving. That's it.
Show us your circuit. If you are using an AC-coupled cathodyne you can still ensure perfect balance.slideman82 said:But cathodyne output it will still be unbalanced... I'm using cathode bias resistor, too
If you take one output from 56K to ground, and the other output from 56K to HT+ supply, and apply equal load, then they are guaranteed to be balanced.
Bypassing cathode bias resistor (or not) will affect gain and LF frequency response by a tiny amount, but will not affect balance. HT+ decoupling arrangements may affect LF balance, but you just have to ensure that you use the right values to maintain balance to as low as you need. If this is a guitar amp then fine details of output stage balance probably don't matter anyway.
I'm not sure what the problem is. We keep saying that exact component balance guarantees exact signal balance (not true for most other phase splitters BTW) but you seem to have trouble believing us?
Bypassing cathode bias resistor (or not) will affect gain and LF frequency response by a tiny amount, but will not affect balance. HT+ decoupling arrangements may affect LF balance, but you just have to ensure that you use the right values to maintain balance to as low as you need. If this is a guitar amp then fine details of output stage balance probably don't matter anyway.
I'm not sure what the problem is. We keep saying that exact component balance guarantees exact signal balance (not true for most other phase splitters BTW) but you seem to have trouble believing us?
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