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In Reply to: RE: OK, let's assume worst case... posted by Triode_Kingdom on October 13, 2016 at 21:50:27
OK, I was able to measure the primary of these 5K:8 transformers at three points -
20 mADC: 20H
40 mADC: 14.5H
60 mADC: 10H
I'll have to wait for an actual CF project to test frequency response, but I expect it to be smooth and extended in such a low impedance circuit. Great, it looks as though these will work well with nearly any CF driver!
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Keep in mind that low impedance output impedance is a small-signal value. A cathode follower can deliver the most power into about the same impedance as a plate-loaded stage. Available undistorted output swing will be less as load impedance drops.
Yes, I understand the load shouldn't be a lower value than if it were located at the anode. I'm making use of the lower Z (and reduced DCV) at the cathode solely to permit direct coupling. Eliminating the coupling cap is primarily for the purpose of ensuring near immediate recovery from output stage overload.
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Buy Chinese. Bury freedom.
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