Anyone Put A 10-Turn On A Megawatt.
A ten turn potentiometer? With poor eyesight and a crippled hand I sure could use some disassembly and reassemble tips. Such as what needs to be done to gain access under the board to solder leads ...
Forum Discussion
I did. But I didn't feel like disassembling the whole durn thing, so I paralleled the 10 turn with the original pot - just soldered my extensions to the appropriate pot legs on top of the board. It increased the voltage available by ~.5v - about right for what I wanted.
CC
I mentioned it here:
http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/28279273/gotomsg/28281131.cfm#28281131
"On my recently acquired MegaWatt 400, I didn't feel like pulling the whole thing apart to replace the pot. So I just paralleled the new 10 turn with the original and set the original to as low (resistance) as it would go (Highest voltage). To do this I just soldered zip wire to the exposed legs of the pot on top of the board, and ran it to the new pot, stuck to the top of the PS with mounting tape.
On these supplies, lower resistance corresponds to higher voltage - noted by Landyacht & confirmed on mine. Parallelling the pots allowed me to shift the resistance down just a smidge, since the original pot had a range of ~1-980 ohm or so. Now I have <1 to ?something just under 980?. The voltage available was ~9.5 -15.5V, now it's about 10-15.8 . Numbers are approximate, I did this a month or so ago. "
CC
I mentioned it here:
http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/28279273/gotomsg/28281131.cfm#28281131
"On my recently acquired MegaWatt 400, I didn't feel like pulling the whole thing apart to replace the pot. So I just paralleled the new 10 turn with the original and set the original to as low (resistance) as it would go (Highest voltage). To do this I just soldered zip wire to the exposed legs of the pot on top of the board, and ran it to the new pot, stuck to the top of the PS with mounting tape.
On these supplies, lower resistance corresponds to higher voltage - noted by Landyacht & confirmed on mine. Parallelling the pots allowed me to shift the resistance down just a smidge, since the original pot had a range of ~1-980 ohm or so. Now I have <1 to ?something just under 980?. The voltage available was ~9.5 -15.5V, now it's about 10-15.8 . Numbers are approximate, I did this a month or so ago. "
