Hi bck2trx,
I have only worked with a Dictaphone model and they are probably all different, but you usually have to punch a couple of numbers to slow it down.
That's helps a lot, does it not?
I would try googling the model of your c-phone and the words speed control or similar words and see if you get any hits, or if you don't have a manual with it, go to the manufacturer's website and see if they have the manual available on line.
Sorry I couldn't help more!
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kkb (Karyn), who considered herself a newbie after 18 years doing MT and even though she is no longer working in the field, still remembers what it was like to be a newbie!