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Gottlieb, 1975You're currently viewing posts by Pinsider mbwalker.
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Quoted from leckmeck:Incidentally, I tried to use just a capacitor to smoothen the ripple. It worked for about five minutes, then the capacitor burst and gassed out...
By chance did you install the capacitor backwards? It is polarized.
Quoted from leckmeck:It’s not pretty, but it works. I left it energized for a long time and there’s no heat on the coil or capacitor.
[quoted image]
Next time I’ll do the bridge.
Thanks for the counsel, y’all.
Invoice is in the mail. 
Joking aside, I'd probably secure things a little better. The surface mount resistor might not (won't) fair very well with vibration. Something like this, then run a wire up to the solenoid. And just get a leaded resistor.
Looking at the connection below...I don't think it will last long. At a minimum, run the wire parallel to the resistor lead, not perpendicular.
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Not nit-picking, just thinking long term. Plus you definitely don't want a 50V wire breaking loose!
Quoted from sysprog:I read that bit from Clay about replacing those always on relay coils on a quick draw. I don’t understand the purpose of the diode across the coil lugs. Looks to me that it would work with just the diode and resistor in series. Can someone explain?
When the magnetic field in the coil collapses, a reverse voltage will be generated. The diode across the coil will snub that voltage by turning on. Normally, the diode is off then only turns on when the coil shuts off. Not sure how important it is in an EM (very important in a solid state pin since they don't tolerate a reverse voltage), but likely installed as a precaution.
Make sense?
Quoted from leckmeck:What is the name for that thing? Some kind of mounting board would be great for securing and compartmentalizing all these little components.
I wish I could find one. Mouser has exactly one (!) stocked option for this rating of resistor. Is there another source I should consider?
Thanks for the feedback. I don’t mind the criticism. I gave the resistor/diode choo-choo train a couple of rude yanks and it doesn’t yield. This stuff is on the coin door, where it’s pretty sleepy. Maybe if I put the game on location and have delinquents banging on the coin door!
Google 'terminal lug mounting strip', that should get you started. Amazon has them, but they are around $7-$10 w/Prime. Ebay or a surplus store might be better. I was thinking you could maybe use a screw already in the PF to mount (but don't use that lug for parts then). Coin door - Ah OK. Better, but I'd still go the terminal strip route - then you will never have to worry about it again. Boy, I'd hate to see the 48V (or 24V?) wire come loose and fry something. G.P.E here on pinside might have them. It's kinda old school nowadays to use that style.
I know an easy place to probably find the resistor...me! You'll have to give me a few days to check. Might be 2-3 of resistors instead of one, but I should be able get you close. PM me your address and I'll shoot you the resistors if I can. Still 6 ohm, 2W, right?
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Lincoln, MI