Welcome to the WA4DSY 56KB RF Modem
This is a prototype of the WA4DSY 56KB RF modem. It is intended
for use on amateur packet radio networks. The modem generates RF
in the 28 to 30 mhz range and requires and linear transverter to
convert the signal to a UHF or microwave ham band. The digital
interface is synchronous serial. The modem supplies TX and RX clocks.
For more details see the various links below.
Where to buy 56K modems
Note: Due to spammers harvesting email addresses
from this page I had to make the email address
a "non-clickable" png image. Sorry for the inconvience.
Information about the modems
56K Modem Schematics
56KB Modem Software
(Includes driver source and JNOS110) (298K)
Hi-Speed Networks and modem applications:
Misc. experimental services
No Windows programs were harmed (or even used)
during the production of this web page.
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Packet Radio Topic