Last week I was teaching my students how to run the Flex 3000. One of
the difficulties was the need for loudspeakers so all could hear.
Normally when I need everyone to hear something I use the speakers in
the 42" flat-panel TV I have for doing computer demos but quickly
discovered that it was radiating a huge amount of RF hash and making
the F3K useless.
Just for grins I tried connecting a high-sensitivity loudspeaker to
the "powered speaker" jack on the back. I didn't really expect it to
work and, well, it didn't. I then tried with the headphone jack which
worked superbly with both radios although I did need to add an output
coupling cap (a 1000uF electrolytic) when connecting the speaker to
the headphone jack of the Flex 50000. Apparently the headphone
amplifier has sufficient power to provide excellent output with high-
sensitivity loudspeakers.
So, if you are in a bind and need to drive ordinary speakers, try the
headphone output. You may find that it works fine for your application.
--
73 de Brian, WB6RQN/J79BPL
Brian Lloyd - brian HYPHEN wb6rqn AT lloyd DOT com
_______________________________________________
FlexRadio Systems Mailing List
[email protected]
http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/
Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/
