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23877Re: Amps

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  • Patrick Tighe
    Jul 1, 2004
      The problem may be that you used a potentiometer under rated for the
      power, possibly 1/2W. 200mA at 9V is 1.8 watts and at 400mA, 3.6
      watts. These are just guidelines. Starting and/or locked rotor
      current can be quite a bit higher. Try a pot rated at 2W or better
      yet 5W. That's a cheaper alternative.

      Patrick

      --- In z_scale@yahoogroups.com, "Paul Hertel" <paulhertel@c...>
      wrote:
      > Thankz. I was think the amps were pretty small. I know about the
      voltage
      > as I'm
      > working on a cigar box layout to be run with a 9V battery.
      > Last night I had the pleasure of burning up a potentiometer. A 9V
      battery
      > made the insides glow nicely.
      > Then the tell tail smell of burnt electronics!
      > Maybe I'll have to get the voltage regulator from ZTrack. I was
      hoping for
      > a cheaper alternative.
      >
      > Thankz again!
      >
      > Paul
      >
      > _____
      >
      > From: Kari Sarmanne [mailto:kaikari@l...]
      > Sent: Thursday, July 01, 2004 1:48 AM
      > To: z_scale@yahoogroups.com
      > Subject: [z_scale] Re: Amps
      >
      >
      > Paul,
      >
      > My smallest Marklin loco 0-6-0 BR89 with
      > a 5-pole motor needs only 2.5 - 3 volts to
      > run at a moderate speed. Over 3 volts it starts
      > running too fast and 8 volts makes it to run
      > like a bullet train.
      > It takes only about 150 - 200 mA.
      > I think it is quite the same with other locos too.
      > With max voltage 8 or 10 volts all locos run
      > too fast. I guess no loco takes over 400 mA.
      > Maybe somebody else knows better.
      >
      > CheerZ
      > Kari S.
      > Helsinki/Finland
      >
      >
      > --- In z_scale@yahoogroups.com, "Paul Hertel" <paulhertel@c...>
      wrote:
      > > How much voltage and Amps can a loco motor take?
      > > How about a 5 POL?
      > >
      > > Thanks all.
      > >
      > > Happy Z'ing
      > >
      > > Paul
      > >
      > > Car A
      > > Midwezt Haulerz
      > > Belleville, IL
      >
      >
      >
      > "Z" WARNING! HANDLE WITH CARE! Highly addictive in
      Small DoseZ!
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