potentiometer replacement--Atari
T.B.
little help finding replacements.
I have looked at the potentiometer itself and wrote down all of the relevant
part information that I could find. I discovered that the part was
originally made by a company called Allen Bradley (A-B) electronics, but
that they no longer make the part and have sold off that branch to a company
called Clarostat. I also discovered that the potentiometer was a 5K Ohm
Linear Taper pot part # EJA1N048F502M Type EJ.
I looked around for information which would tell my exactly which Clarostat
pot would correspond to the one I have; but couldn't find that information.
Does anyone know which one it is?
I also found the following two sites offering pots that look like they would
work, but i'm not quite sure if they would. can anyone shed some light on
this for me?
http://www.kelvin.com/Merchant2/merchant.mv?Screen=PROD&Product_Code=110054
http://www.futurlec.com/Potentiometers/POT5K.shtml
tia,
tb
austin, tx
Adam Courchesne
right now and buy a 5K pot and you'd be all set. FYI: all a pot is, is a
variable resistor). If this pot were in a power supply, let's say, then
they type of pot may come into consideration, but since it's not you
should be all set.
-Adam
Michael Fox
got a pair from American Vending Sales in IL for my Championship
Sprint. Paperboy handlebars use the same potentiometers in the pedal
assemblies of Chap Sprint, and most games with pedals use that same
potentiometer so it is very common to find. I think I spend $3-4
each. You don't have to have the exact part number nor the same
company. Just get the same value potentiometer.
Michael Fox
Algonquin, IL
spokexx
not positive. Also make sure the shaft size is teh same. If its too
long it can be cut down. Ill look around too.
bclark
Thanks,
Brian
Art Mallet - Artfromny - formerly A218@aol.com
> T.B. wrote:
> > i have decided to replace the potentiometers in my Paperboy and need a
> > little help finding replacements.
> >
> > I have looked at the potentiometer itself and wrote down all of the
relevant
> > part information that I could find. I discovered that the part was
> > originally made by a company called Allen Bradley (A-B) electronics, but
> > that they no longer make the part and have sold off that branch to a
company
> > called Clarostat. I also discovered that the potentiometer was a 5K Ohm
> > Linear Taper pot part # EJA1N048F502M Type EJ.
> A pot is a pot is a pot...
NO a pot is most definitely not a pot is a pot is a pot. There are 2 types
of tapers on a pot - linear and logarithmic. A linear taper pot, which is
what you need for this application, produces a decrease in resistance in
direct proportion to the number of degrees of shaft rotation, and that
proportion is the same end to end.
The logarithmic pot produces resistance change in a different relationship
to degrees of rotation depending on where in the arc of rotation the shaft
is. It is definitely not suited for steering or throttle control
applications.
Art
Mike Adkins
Shack. The only problem I had was I had to cut down the shaft. It was too
long. Not a biggie. You shouldn't have any problems.
"bclark" <brian...@yahoo.com> wrote in message
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Clay Cowgill
news:vrji8ok...@corp.supernews.com...
> i have decided to replace the potentiometers in my Paperboy and need a
> little help finding replacements.
I'll be the killjoy of the group and put out a caution for using a
RadioShack pot (or anything else under $5)... If you're actually going to
run the game in an arcade or on location you may well be wise to spend the
extra $20-30 and get a good quality one instead.
A lot of the cheap pots have a rotational life of ~10-50K cycles as a MTBF.
If you figure an average game might have 50-200 "turns" on the pot you can
see that you might actually wear out the cheap part in a few hundred games.
Obviously for home use that's a LOT of time, buy if you have it on location
and it gets played 10-50 times a day you might well be replacing it again in
a few months. For arcade use, a pot with 1M+ revolution rotational life can
save some headaches at the expense of ~5x the cost (usually easily recovered
on one service if you have to pay for technician time to perform the
install)...
(I haven't looked into how tough it is to replace the pots in Paperboy, but
if it's like other Atari games it's worth the $30 to just do it once in my
book. ;-)
-Clay
T.B.
trouble locating them online.
thanks
tb
Austin, tx
"Clay Cowgill" <cl...@yahoo.com> wrote in message
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James Sweet
"Art Mallet - Artfromny - formerly A2...@aol.com" <artg...@nycap.rr.com>
wrote in message news:lfrub.122396$ZC4....@twister.nyroc.rr.com...
That and Radio Shack pots are cheap and won't last very well, I replaced the
pots in my Star Wars with them and it worked for about a year, then I
replaced them again with quality Bournes pots and all has been well. You
need the value, whether it's linear or logarithmic, and the shaft diameter,
but there's literally hundreds of suitable parts out there.
James Sweet
"T.B." <balfou...@grandecom.net> wrote in message
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> so where would one buy these higher priced pots? I am having a lot of
> trouble locating them online.
>
> thanks
>
Digikey, Newark, Mouser, and you might even find some suitable ones at All
Electronics. Look for a reputable brand, Bournes, Clarostat, etc, not some
cheap knockoff.
Clay Cowgill
news:gESub.250239$Tr4.764548@attbi_s03...
> Digikey, Newark, Mouser, and you might even find some suitable ones at All
> Electronics. Look for a reputable brand, Bournes, Clarostat, etc, not some
> cheap knockoff.
Yep, the big guys like Arrow and Avnet would probably have them too. You do
need to be a little selective since a lot of the "high reliablity" pots are
used for position sensing with motors and leadscrew drive ans the like so
they have 360 degree versions that don't stop when you get to one end.
You'll probably want a 270 degree rotation or something if you ever use one
in a pong or similar application. For foot pedals, handle bars, throttle
sensing, etc. a 360 would probably work since the mechanism would prevent it
from free-rotation anyway.
-Clay
T.B.
"James Sweet" <james...@hotmail.com> wrote in message
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