Modifications for the ICOM - RogerK

Connect the NTC, FAN and power and adjust with P the voltage the fan gets (6.5V at 20 degrees celcius).Just trie it and You will be amazed (and think by Yourselve why did'nt came ICOM up with that idea).The cost for all of this was just $10 us dollar and 1 hour of work.Thanks to C@rlos for sending me the schematics.When You turn on the PS85 the fan will start at full speed (to remind You how noisy it can be) after about 2 seconds it will slowdown.I thought about replacing the red LED in the front for a dual colour one so You can see what the fan is doing but decided not tothat (yet).Any suggestions ?Just e-mail me: pe3hmp@hotmail.com.MODIFICATION.NETThis modification is read 423 times.top of page19-07-1998(R-1) R1 (and IC-nSAT) Owners NoteR1 Tech Note #1 (c) 1991 Paul FlahertyThe BNC connector on most HTs leaves something to be desired, and the R1 and cousins are no exception. The connector nutand the back case form a smooth - smooth metal boundary, and the connector eventually will come loose.If this happens to you, do *not* merely retighten the nut. Instead, take it off, place a lock washer underneath the nut, and*then* retighten. If you don't, you'll wind up with a cycle of loosening and retightening. This is not a good thing, since the wireconnecting the BNC to the PC motherboard is solid, and the solder connection leaves something to be desired.If you've already managed to twist the wire loose from the PC board, all is not lost; the wire may be reattached. WARNING: Thefollowing instructions are *NOT* for the faint of heart. If you have *ANY* doubts about your technical abilities (especiallysoldering), find someone experienced with repair of handheld radios to do it for you.You'll need:A low wattage soldering iron, preferably cordlessThe soldersucker of your choice