[GreenKeys] replacement fuses for Dovetron MPC-1000R
Fred Weksberg
VE3PIE at outlook.com
Thu Jun 8 06:42:53 EDT 2023
Hello everyone,
Need advice on a newly acquired Dovetron MPC-1000R - dead on arrival.
Cleaned it up cosmetically and found a few problems with the power supply - now working.
What fuses do I put in the back ? It came with a 500 mA SB for the loop, and this coincides with the schematics I have reviewed.
The other fuse holder came with a blown 100 mA fuse
I got it running and this fuse has 180 mA going thru it.
I checked a bunch of manuals and schematics, and got different ratings for this fuse (100 mA, 250 mA, 150 mA)
It has a bunch of cards, so it must be drawing more current.
It has:
TSR-500D
BBP-100
TID-100
KOS100 MARK II
TMS100 Rev B
DAS-100
SSD100 solid state cross display
Nothing seems to be running hot, and all the boards are intact, nothing looks burnt.
I will increase the fuse rating to 250 mA or 300 or 400 mA. What is appropriate here ?
Or is something wrong, and it should be running under 100 mA ?
Thanks, Fred Weksberg
VE3PIE / VE3WN
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