Difference between revisions of "Talk:Bally/Stern"
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re: Diodes on bally stern - I think you should revert it back, there's no more investigation needed. Bally used it from the factory. Stern used it interchangeably. While I usually put 1n4004's back on because I have a ton of them due to their universal use in wpc etc. and on coils, the issue raised by the RGP discussion of this is completely wrong..... you're not pumping more than 5 volts through it (the PIA is driving it) and you're not putting more than 0.2 amps through it, either. I forget the spec offhand for the PIA's max current output capability, but I doubt it's getting anywhere near 0.2 amp, and there's current limiting resistors on the mpu board anyway on the strobes and returns. | re: Diodes on bally stern - I think you should revert it back, there's no more investigation needed. Bally used it from the factory. Stern used it interchangeably. While I usually put 1n4004's back on because I have a ton of them due to their universal use in wpc etc. and on coils, the issue raised by the RGP discussion of this is completely wrong..... you're not pumping more than 5 volts through it (the PIA is driving it) and you're not putting more than 0.2 amps through it, either. I forget the spec offhand for the PIA's max current output capability, but I doubt it's getting anywhere near 0.2 amp, and there's current limiting resistors on the mpu board anyway on the strobes and returns. | ||
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| + | Also, not sure that changing pinwiki to mirror what some random chatter on RGP speculates on is a good idea. You're taking the authoritative source (the machines themselves, and the documentation provided with them) and changing it to suit the opinions (dead wrong, in this case) of a couple individuals who either didn't think through what they were posting or flat out don't understand ratings of parts. You could just as easily sub a 1n4001, 4002, 4003, 4005, 4006, 4007 diode across the switch matrix and it will work fine in this applicaiton. Ditto with other small signal diodes (although I have not seen the 914 specified in bally or stern's documentation). | ||
Revision as of 08:28, 9 September 2012
feel that the actual dimensions listed in this section are misleading and are not correct in that it's more important to get the gap correct by feel than by saying "I adjusted this switch to 1/64" (which is too close for any switch IMO) - Scochar
I agree about the "feel", but what actual dimension should be given to someone who can't get the feel correct? -jpal
Well, the bally manuals recommend 1/16".
So change it. :)
"the One" also recommends 1/16". Hibs
re: Diodes on bally stern - I think you should revert it back, there's no more investigation needed. Bally used it from the factory. Stern used it interchangeably. While I usually put 1n4004's back on because I have a ton of them due to their universal use in wpc etc. and on coils, the issue raised by the RGP discussion of this is completely wrong..... you're not pumping more than 5 volts through it (the PIA is driving it) and you're not putting more than 0.2 amps through it, either. I forget the spec offhand for the PIA's max current output capability, but I doubt it's getting anywhere near 0.2 amp, and there's current limiting resistors on the mpu board anyway on the strobes and returns.
Also, not sure that changing pinwiki to mirror what some random chatter on RGP speculates on is a good idea. You're taking the authoritative source (the machines themselves, and the documentation provided with them) and changing it to suit the opinions (dead wrong, in this case) of a couple individuals who either didn't think through what they were posting or flat out don't understand ratings of parts. You could just as easily sub a 1n4001, 4002, 4003, 4005, 4006, 4007 diode across the switch matrix and it will work fine in this applicaiton. Ditto with other small signal diodes (although I have not seen the 914 specified in bally or stern's documentation).