[ICOM] re Encoder and Mem Battery for IC-751A

[Jim Hargrave]

Gerry,

I support your preventative maintenance.

However, I have alternate solution. I use TRI-FLOW with Teflon, which comes
in an aerosol can. It penetrates very well and does not gum up like oil.
Once liberally applied, I have never had to repeat the lubrication. The
shaft on my IC-735 is still just as free as when I applied the TRI-FLOW
about 20 years ago.

   * 73's Jim W5IFP *


   >-----Original Message-----
   >From: icom-bounces at mailman.qth.net
   >[mailto:icom-bounces at mailman.qth.net]On Behalf Of Gerry Pement
   >Sent: Sunday, March 16, 2008 1:53 AM
   >To: icom at mailman.qth.net
   >Subject: [ICOM] re Encoder and Mem Battery for IC-751A
   >
   >
   >To all concerned
   >On the subject of frozen encoders on the Venerable old IC-751A an ounce
   >of prevention is way easier to do then try to repair this problem once
   >it has occurred. Every five or so years on all my Japenese rigs and
   >first thing I do when I get a new Icom or Yaesu rig is to remove the
   >main tuning knob. In this case IC-751A you take off the Rubber Tire
   >loosen an allan set screw to take off the knob. Instill 1 ONE
   >and only 1
   >drop of Sewing machine oil or 3 in One Motor oil for small motors.
   >Rotate the shaft to work in the oil wipe off excess oil. Reinstall knob
   >and Tire. I also remove the RIT knob and instill one drop of
   >oil on that
   >encoder shaft also. On some of the other radios IC-706 family and
   >FT-757GX the main tuning is a pull off hand tight Press Fit. The
   >FT-767GX requires you be very careful to remove the tire to gain access
   >to the encoder shaft allan set screw. On the subject of the Back-up
   >Battery yes the IC-751(A), 745 R71A and 71 series V/Uhf radios have
   >volatile memory for their operating system. If you find someone handy
   >with DOS programming the operation Firmware can not only be
   >reprogrammed
   >if memory is lost but updated to add like the new band at 60m
   >or 5.3Mhz.
   >without opening the whole radio to TX everywere. You can do that when
   >you change the Battery and reprogram the Ram Card. I hope that
   >helps you
   >all.
   >73
   >Gerry VE7BGP
   >----
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   >