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[RTTY] Opto Couplers ?

To: <rtty@contesting.com>
Subject: [RTTY] Opto Couplers ?
From: Robert Webb" <g0urr@btopenworld.com (Robert Webb)
Date: Thu, 3 Jan 2002 14:24:58 -0000
Hi all and a Happy new year from sunny England. I have been building an FSK
interface between serial port and 1000MP. All the designs i have seen use
Opto Couplers but which ones ??. I have used a low current version from
siemens SFH618-2 and seems to be working but no fsk out from the radio.
Works ok with the FSK from a Kamplus and my meter suggests that the output
from my interface is working but no joy. Any suggestions B4 saturday 16:00
would be appreciated, all the very best de Robert G0URR K


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