And so it came to pass, on 06-03-97 17:23,
   that Dave Bachmann spake unto Bonnie Goodwin:
 DB> Bonnie -
 DB> The other day you recommended an isolation transformer as a
 DB> solution to a hum problem I encountered when I hooked up cable to
 DB> TV and tuner then connected the TV to the pre-amp. I stopped in at
 DB> Radio Shack and found them, but now have even more questions.
Radio Shack will tend to do that to you :-)
 DB> That which was in stock was labelled as 1:1 - are there other
 DB> types, and if so what should I be looking for. 
1:1 is the ratio of windings on each side of the transfomer.  This is the 
usual ratio for an isolation transformer; simplified, it means the output 
level will be the same as the input level.
 DB> It is a device with 2 leads on each side and no directions for
 DB> installation. Is there a difference between input and output sides?
Technically, yes, but it should make little or no difference to which way you 
hook it up.
 DB> Is this to be connected to the coax or the interconnect. 
It should go inline with the interconnect between the two devices you're 
isolating.
 DB> In either case, does it matter whether it is on the sending or
 DB> receiving side?
No.
 DB> Lots of questions. Is there a recommended audio book that you can
 DB> point me toward?
Some basics on transformers will help you in understanding what's going on in 
this case.  You'll probably find more useful information under "electronics". 
 The local library is a good place to start.
-------------------------------------------
Love, luck, and lollipops...
Matt


--- Sqed/32 1.10/unreg
---------------