Just found more Stuff:

St Louis Switcher:
http://207.195.94.13/sart/radio_library/switcher-supply.pdf

Simple mod:
http://www.qsl.net/vk2ep/news/dec2001.doc

Data sheets and tech pubs:
http://www.fairchildsemi.com/ds/TL/TL494.pdf
http://www.fairchildsemi.com/ds/KA/KA7500B.pdf

http://focus.ti.com/docs/prod/folders/print/tl494.html

Articles about switched power supply repair
( on a slot machine tech magazine !! )

http://slot-tech-ftp.serveftp.com:8080/magazine/february02.pdf

 http://slot-tech-ftp.serveftp.com:8080/magazine/march02.pdf



73
Paulo Ferreira CT2ILQ

Here are more links about the subject:
( stolen from newsgroups )

Basic ones:
http://www.antennex.com/preview/archive3/powers.htm
http://www.qsl.net/aa3sj/Pages/PC-Supply.html
http://www.mattsrcstuff.com/PCPS.htm

St. Louis switcher
http://www2.arrl.org/members-only/tis/info/pdf/0205035.pdf
http://www.qsl.net/wj5o/project.htm
http://www.njqrp.org/qhbextra/6/6d.html


Advanced ones:

http://www.qsl.net/yo5ofh/projects/13.8v_pc_ps/13_8%20v%20-%2015a%20from%20a%20pc%20power%20supply.htm

Looks the same as
http://www.qrp4u.de/docs/en/powersupply/index.htm

Nice modification
http://www.qsl.net/vk4ba/projects/index.html

ATX power supply example
http://pavouk.comp.cz/hw/en_atxps.html

Changing an ATX PSU to 12-24V input (input!):
http://www.acs.comcen.com.au/atxps.html

If anyone has done it or has more links please
post more info.

Computer PSUs are Cheap, "Normal" PSUs are not cheap.
;-) ;-) ;-)

73
Paulo Ferreira CT2ILQ

What version are you using?

I had tried once Logwindows and the more recent versions did not support the FT920 !!!
Yes you can choose Ft920 on the menus but it doesnt work !!!!

It was on a friends computer/radio and I hit
the head on the wall many times before discovering
that.
I thought it was serial port compatibility troubles,
or the FT920 serial port "fried", but it was nothing of that.

Test the computer/rig interface with:

Colins Spectrum analyser:
http://www.mm5agm.pwp.blueyonder.co.uk/

FT920 Cat Program:
http://home.earthlink.net/~n7yg/ft920cat.htm

Or test it with CI-V-Commander that is part of the
DX-Lab suite of programs.

http://www.qsl.net/dxlab

All of the above programs are free software.

Paulo Ferreira CT2ILQ

my_callsign@arrl.org    -> replace my_callsign