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Grigsby-Grunow 1932 Sherwood (USA) Long case Clock Radio
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Location: Wangaratta, VIC
Member since 21 February 2009
Member #: 438
Postcount: 5595
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This is an unusual one, in for repair.
This has not got the original speaker (have circuit, it's in Rider) There appears to be something missing from the top, like a dome(?) to protect the speaker.
Unlikely another in Australia, but ........ It has been posted on an American site as well. Information on what should be there appreciated. Radio Museum also has info on it.
Marc
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Location: Tamworth, NSW
Member since 6 April 2012
Member #: 1126
Postcount: 470
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Location: Wangaratta, VIC
Member since 21 February 2009
Member #: 438
Postcount: 5595
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As the apparatus is 110V US mains and the clock is electric and despite the chassis saying 50 to 60Hz. Rather than buying a step-down transformer I was thinking UPS, as that will keep the electric clock running
Marc
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Location: Sydney, NSW
Member since 28 January 2011
Member #: 823
Postcount: 6882
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A talking clock 
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Location: Wangaratta, VIC
Member since 21 February 2009
Member #: 438
Postcount: 5595
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Not yet a talking clock; Monkey has been in there, what he has done has not been assessed as yet.
But any signs of tampering by the unknowing, rings alarm bells, not the chimes in the clock. But I have noted that the clock is actually right, twice a day.
Marc
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Location: Oradell, US
Member since 2 April 2010
Member #: 643
Postcount: 835
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Does the clock control the radio? I don't see an extra hand on the clockface for the user to select a wake up time.
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Location: Wangaratta, VIC
Member since 21 February 2009
Member #: 438
Postcount: 5595
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At this point the unit has not been touched, just looked at. Once I clear the line I will slip the chassis & check the clock.
The circuits I have say Fyfewood, this is Sherwood & is stamped as a 15Axxx. There is on this circuit no evidence of clock switching, or visually, anything other than power wires to the clock & I am not over the moon with them.
Due to the visual evidence, there will be no powering of this set until several issues are addressed. It is pointless to do something stupid like that anyway: There is no way it will run, or is electrically safe.
Marc
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Location: Harston, VIC
Member since 28 February 2009
Member #: 442
Postcount: 145
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A similar model to the Kriesler Grandfather of which few were made. In the aussie model the clock was a spring drive and less attractive face than this model.
Last time I saw a Grandfather was at an auction of a collectors collection in 2004. Went for around 3.6K from memory.
Cheers, Graham.
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Location: Melbourne, VIC
Member since 26 December 2013
Member #: 1473
Postcount: 11
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Unless the clock has been changed it will run fast because it is US 110v 60Hz and uses the mains frequency synchronized for accuracy. When running it off a step down transformer it will only get 50hz so it wont be accurate at all. I have had experience before with US clocks and they won't work here unless you can change the frequency the clock will see from the mains.
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Location: Wangaratta, VIC
Member since 21 February 2009
Member #: 438
Postcount: 5595
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My intent at this point is to get it all going using a transformer as I already have them.
My next move has a two fold intent. One for the voltage & one for the clock. As the clock will stop with a power outage, I was considering a UPS putting out the correct voltage and frequency, with an input of 240V
Many will handle voltages from 90V to 260V input and I doubt there would be much problem altering, or buying what is wanted.
Marc
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Administrator
Location: Naremburn, NSW
Member since 15 November 2005
Member #: 1
Postcount: 7548
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Sourcing a 110v/60Hz UPS should be easy enough. Even new ones are cheap these days but postage from the US would hurt. Because you are dealing with a motor, a sine wave model will be better than a modified square wave one. With the latter, the synchronous motor may not rotate at the correct speed and may also run hot. If such a model won't take 240v as the input then a stepdown transformer would be needed as well, on the line side of the UPS.
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A valve a day keeps the transistor away...
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Location: Wangaratta, VIC
Member since 21 February 2009
Member #: 438
Postcount: 5595
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The radio itself is labeled 50-60Hz so my only concern there, is radiation from a UPS.
Most of the UPS PSU's on computers have a Wide input voltage range and I am sure that there is a lot of 110V stuff about. Biggest PIB is sourcing plugs & sockets. Which is a OH&S issue as people will use the wrong plug (another matter).
It should not be that difficult to make a 240V input (or Multi-Voltage input) UPS put out the correct voltage for it.
It would be interesting to see comment from purveyors of such devices: They may never of thought of doing it here?
Marc
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