I notice that inexpensive audio transformers have limited low frequency
response and are invariably offered as either step-down or 1:1. Two
questions. Can anything be done to extend the low end response, and
what are the practical limitations to turning one of these transformers
around and using it as a step up? (In other words, is there a cheap
alternative to an expensive Jensen mic input transformer?)

On 5 Feb 2006 10:07:03 -0800, wrote:

I notice that inexpensive audio transformers have limited low frequency
response and are invariably offered as either step-down or 1:1. Two
questions. Can anything be done to extend the low end response, and
what are the practical limitations to turning one of these transformers
around and using it as a step up? (In other words, is there a cheap
alternative to an expensive Jensen mic input transformer?)

The low frequency response is built-in. It is set by the inductance of
the coils, which depends on the amount of iron and copper in there.

As for step up vs. step down - that is simply a function of which way
round you connect it.

d

Pearce Consulting
http://www.pearce.uk.com

(In other words, is there a cheap
alternative to an expensive Jensen mic input transformer?)



No.

"Bret Ludwig" wrote in message
oups.com...
(In other words, is there a cheap
alternative to an expensive Jensen mic input transformer?)



No.


an expensive Triad transformer?


a low noise opamp?