Ken Restivo wrote:
On Wed, Dec 22, 2010 at 07:49:26AM +0000, Folderol wrote:
On Tue, 21 Dec 2010 22:10:07 -0800
Niels Mayer <nielsmayer@xxxxxxxxx> wrote:
Jensen has some really good application papers talking about audio
transformers. By induction, one might get an idea of why they cost so
much -- same reason why other "pro" stuff with a reputable name also
costs a lot.
<snip>
I think some people are totally missing the point. The O/P has already said he
doesn't want to spend a lot of money as the kit he's connecting to is only of
moderate quality.
I don't know if the links I suggested to Ken are any good (whether he's able to
buy from those people) but I asked 'someone who knows'(tm) about these things
and was told that the 'Oxford' transformers are more than adequate for the job.
Thanks!
Yes, I obtained a pair of cheap telephone isolating transformers from Radio Shack. And it works! Yay! US$8 total.
It is indeed specced for 300-5000Hz, but it seems pretty flat when run with a short (1 foot or so) wire. But, I'm noticing a lot of high-end rolloff with a 20-foot wire. Are there any components I could add to combat this?
This is why you need transformers that are properly designed for the use
you intend to put them to. It might seem like a cheaper option to buy
anything you can find that looks like it might work, but this is often a
false economy. It might be better to consider if the problem you want
to solve can be achieved without resorting to transformers of any kind.
I suspect that you will find the response (even into a foot or so of
wire) is very far from flat.
Since I have the magic of JAPA handy, perhaps I'll actually measure its frequency response. Nice to have great (free) tools available for this stuff.
-ken
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