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| millwright:
Nice little motor Bob, i belive that i have 2 of them still about somewhere in the attic. they were originally fitted in model motor torpedo boat built for me by my father when i was about 8yrs old the boat is still about and in reasonable condition. not bad to say im 61 now. Dont know if anyone can remember the batteries it ran on, they were made by ever ready and were about 6ins by 4ins by 3/4 of an inch wide with a row of jack plug like holes on the 6 by 3/4 side which gave various voltages up to i think 6v max. the boat ran as a straight runner at the time, though i converted it to single screw single motor and radio control years ago, the old Mc Greggor Digi Max 2 channel. never ever seen any other batteries like those, anyone shed any light on them. So to speak. John |
| Bluechip:
John All sorts of strange batteries around years ago. I remember an Eveready ( 753 756 ?? ) 90V ht battery for valve portables. The one you had may well have been for the LT ( valve heaters ), some were low voltage like 2.5V or 1.5V etc. Although they mostly had rechargeable accumulators for that job. Doubt if there'd be much guts in a dry battery. It was the DF series valves ... eg DF91 etc. not that anyones interested ... :lol: http://www.r-type.org/pdfs/df91.pdf Although according to that the heaters on this valve only took 50mA . Long time ago .. Dave BC ZZZZZZZ's I think ... :thumbup: |
| krv3000:
ooo don.t get me started i will post off topic |
| velocette:
--- Quote from: millwright on April 19, 2012, 05:15:35 PM --- ""Dont know if anyone can remember the batteries it ran on, they were made by ever ready and were about 6ins by 4ins by 3/4 of an inch wide with a row of jack plug like holes on the 6 by 3/4 side which gave various voltages up to i think 6v max."" --- End quote --- Battery was a "Grid Bias" 1.5 to 9 volts in 1.5 volt steps. Great for controlling motor Speed-Torque output Just stick the "Banana Jack Plug" in the Voltage required. As for a date on the motor I had one bought in the late 1940s used it to power "Meccano" models. The pinion gear meshed to a 57 tooth meccano gear gave a reasonable amount of torque and the sprocket fitted Meccano Drive Chain. Never had much success with the chain drive. Eric As for using it as a DC generator not much use with only three armature coils |
| millwright:
Thanks Velocette, Googled Grid Bias Battery and got the details and a pic. Sorry Bob for going off topic. John |
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