Clark, there is a mod recommeded by Astron and the CAP for floating a
battery across a supply for emergency power purposes. Apart from isolation
diodes and adquate fusing, this mode inserts a 10K resistor in the input
line of the 317 regulator if I recall correctly.
Check out the CAP or Astron sites and see what you can find.
73/72/oo, George W5YR - the Yellow Rose of Texas
Fairview, TX 30 mi NE of Dallas in Collin county EM13qe
Amateur Radio W5YR, in the 56th year and it just keeps getting better!
QRP-L 1373 NETXQRP 6 SOC 262 COG 8 FPQRP 404 TEN-X 11771 I-LINK 11735
Icom IC-756PRO #02121 Kachina 505 DSP #91900556 Icom IC-765 #02437
Clark Savage Turner wrote:
>
> Curious, I have an RS-35M that keeps blowing the regulator, but it does
> it after some time of operation....like a day, sometimes a few weeks,
> then it goes out, supply shuts down. At first I suspected the little
> regulator voltage pot, it is cheap, so I shot it with DeOxit and wiggled
> it, put a new regulator in (the thing is socketed from the last owner, I
> suppose this has been happening for some time!) - it worked for a couple
> of weeks, powering transmit / receive cycles just fine.
>
> There isn't much on the board, I can't see what could be killing the
> regulator in there. I will replace the pot just for good measure (it
> acted dirty when I set the voltage), but does anyone have any other
> suggestions? Ever see this problem?
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