Frequencies

USB dial (MHz): 0.136, 0.4742, 1.8366, 3.5686, 5.2872, 5364.7, 7.0386, 10.1387, 14.0956, 18.1046, 21.0946, 24.9246, 28.1246, 50.293, 70.091, 144.489, 432.300, 1296.500

3rd Party Maps and Data

M0XDK Map
KB9AMG Monthly Stats
WA2ZKD Spot Analysis
DJ2LS WSPR Spot Heat Map

Who's online

There are currently 90 users online.

Choice of optoisolator for interface?

6 posts / 0 new

Log in or register to post comments

Last post

Sat, 2009/10/24 - 18:23

#1

G7MRV

Offline

Last seen: 5 months 1 week ago

Joined: 2009/10/16 - 21:15

Choice of optoisolator for interface?

Hi All,

Im about to build an interface for WSPR etc, based on the KISS circuit elsewhere on this forum (designed by a VK, my appologies for forgeting who!)

This design calls for a 4N23 optoisolator. I dont have any of these, but i have an old UPS which contains 1x 4N33 photodarlington isolator, and 3x P521 isolators.

I would like to use one of these as i have them onhand. Can anyone tell me if there are likely to be any problems with using either of these types? As this is a simple switching arrangement i cant forsee any troubles, but then i have little experience in using optoisolators!

Any advice gratefully received,

Martin G7MRV