[Hammarlund] Hammarlund HQ-180 Clock

[D C _Mac_ Macdonald]

I vote for the step-down transformer route, Andrea.
However, you can also try the following:
1) Disconnect the receiver from power mains.
2) Measure the resistance of the clock motor with an accurate digital ohmeter. You will need to disconnect one of the two wires to the clock for this measurement.
3) Determine the power consumption of the motor using Ohm's law.
4) Put a resistor of the same value and safe power rating (x 2) in series with the motor.
5) Reconnect the receiver and check for operation.
 
* * * * * * * * * * * 
* 73 - Mac, K2GKK/5 * 
* (Since 30 Nov 53) * 
* k2gkk at hotmail.com * 
* Oklahoma City, OK * 
* USAF & FAA (Ret.) * 
* * * * * * * * * * * 
 
 
> Date: Mon, 9 Sep 2013 11:17:38 -0400
> From: wrcromwell at gmail.com
> To: hammarlund at mailman.qth.net
> Subject: Re: [Hammarlund] Hammarlund HQ-180 Clock
> 
> On 09/09/2013 10:59 AM, Andrea Liverani wrote:
> > Hi, i am IW5CI, i like very much vintage radio and boatanchors made in the
> > USA.
> > In my collection i have some hammarlund gear like HQ-180AC, SP-600 (JX-21)
> > a Superpro 400X and an HX-500 trasmitter. All the equipment is in good to
> > mint conditions and work great.
> >
> > When i purchased th HQ-180AC i noted that the clock motor was very hot
> > after some usage and i found that the receiver was configured for 220V AC
> > as is present in Italy, but i think the clock motor works at 110V AC.
> >
> > Has anyone an idea about the value of a suitable resistor to drop the
> > voltage from 220 to 110v?
> >
> Hi Andrea,
> 
> How about a small transformer that will give you 110 - 120 volts AC from 
> your 220 volts input? Those are available new for what I think are 
> modest prices at several online "stores". That would be the most 
> reliable and efficient way to deal with it.
> 
> If you can find the current draw for the clock at 110 volts AC your 
> resistor would have to drop the other 110 volts at whatever that is 
> current. I wonder if one of the manuals gives that information. If you 
> don't have the hard copy manuals you can probably find a copy at BAMA.
> 
> Good luck and...
> 
> 73,
> 
> Bill KU8H