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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets.

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Old 17th May 2019, 6:53 am   #61
Radio Wrangler
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Default Re: Power MOSFETs

The interesting factor is that the damping factor of an audio amplifier is broadband. The output impedance might start ncreasing towards the top end of the audio range as loop-gain gets lower, but it won't be bad. The amp will respond well to load fluctuations.

The original scheme of a carbon pile reg operated by a solenoid can only respond slowly to load variations, so the supply is essentially unregulated in the short term.

The avionics gear being powered had to be designed to work with the latter scheme, so a big audio amp would be TLC in comparison.

David
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Old 17th May 2019, 10:18 am   #62
Argus25
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Default Re: Power MOSFETs

Quote:
Originally Posted by Julesomega View Post
I think what we are discussing here is the Damping Factor of an audio amp. The one I have offered is spec'd as "@1kHz into 8 ohms >400" which implies an output impedance <0.02ohm
MC1250
That is pretty good.
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