Core size matters? Microphone input transformer?

[mkiijam]

All other things being equal, what would a larger core/bobbin get me?

same turns, same wire, same core material etc... just bigger. My wife just said "better", but I don't think that really helps here... :-(

 

[Murdock]

Usually a bigger core means more headroom before the transformer saturates and distortion occurs.
But I think going way bigger can be detrimental to the high frequency response.
But I hope our transformer experts chime in an can explain that in detail.

 

[ruffrecords]

Same number of turns on a bigger core means more wire which means more resistance which means more noise. Longer wire means more capacitance which means poorer HF response. Same turns on a larger core does mean the level required to saturate the core is higher but this is only really important at frequencies below 100Hz.

Cheers

Ian