Rob - You are correct in your assessment. It turns out the LK-550's step-start circuit is a small PC board which includes the (missing) high power resistor (I have a 25 ohm, 25 watt ceramic as a subs
Looks like you have the fix well in hand. I'll bet the stock carbon comp. resistor was underrated and eventually gave out. It took a long time but it eventually happened. I tend to engage in overkill
Looks like you have the fix well in hand. I'll bet the stock carbon comp. resistor was underrated and eventually gave out. It took a long time but it eventually happened. I tend to engage in overkill
Rob, what I used was a PAIR of 30 amp rated, DPST relays, Like P+B types, in an external 8x8x4 standard metal electrical box...with loads of knockouts (home depot). 1st relay is used to apply the 240
My LK-500ZB now has two power cords. One plugs into 240vac, and the other into 120vac. A DPDT heavy duty toggle switch selects the 120vac for turn on, then snaps to 240vac for operation. Works perfec
These simple solutions are often the best and most reliable. Thanks for sharing your ideas Jim. 73 Rob K5UJ _______________________________________________ Amps mailing list Amps@contesting.com http