At 21:57 3/09/99 +0200, you wrote:
>Hello Justin,
>
>Sorry, I'm a bit late!
>
>Justin Grimm schrieb:
>>
>>   Hi all
>>   Has anyone made the fsk modem by Rildo Pragana?
>>   Im thinking of constructing it but am unclear on a few points.
>>   1.
>>   C9, C11, C13, C14, C15 and R8's values are unclear. Does
>>   anyone know what they should be?
>
>A 10kpF means 10 * 1000 pF, 10nF. (If I'm not mistaken) and a 10k
>condensator should also have a value of 10nF. R8 has a value of 7500
>Ohms (7.5 kOhms)
>
>>   2.
>>   Transformer T1's size or value is unclear.
>
>It should be a 1:1 Transformer with 600 Ohms Inpedance. If you have an
>old phone left you can use its transformer.

Do not use the transformer out of an old 800 series telephone, it is not
600R. Buy one off the shelf, the small size is not a problem as nor current
should be flowing thorugh it. As for the line match, better look for a TN12
impedance (Complex) I don't suggest that you build this and connect it to a
phone line


Dennis



>
>>   3.
>>   Will the modem work on Australian phone network?
>>
>>   Can anyone fill in the blanks?
>>   Thanks
>>   Justin
>
>I have not built it but it should work on almost every phone system...
>
>Friendly Regards
>Markus
>
>