Who is interested in a groupbuy of Mark Kelly's DC controller PCB and related parts - Page 36 - diyAudio
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Old 23rd June 2006, 08:58 PM   #351
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Join Date: Feb 2005
Location: Moelv
Well, as I am an engineer in electric systems and installation I may not have the right arguments for a choice, but the feeling in my stomach says brass. Cost is no object anyway at this level. Aluminium is great for Ferraris and cost effective power cables, nut maybe not my turntable. Guys?
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Old 24th June 2006, 04:09 AM   #352
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Location: Illinois
I vote for aluminum as the material for the pulley.

I would also like to increase my order from one pulley to two please.

Thanks,
Mark
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Old 24th June 2006, 12:44 PM   #353
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I'm in for n.3 pulley and brass material
Giorgio
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Old 24th June 2006, 07:23 PM   #354
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Join Date: Jun 2004
Location: Hong Kong
Default Pulley

I would like to increse the number of pulleys to a total of two. I would prefer brass but would go along with the majority vote.

BTW won't brass be more subject to oxidation? I am no expert on these matters.
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Old 24th June 2006, 07:42 PM   #355
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Join Date: May 2005
Location: oslo
Count me in for two, my vote is for brass.


Of course brass will oxidite more, and more visible than alu.
But will it matter for performance ?
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Old 25th June 2006, 08:21 AM   #356
john2 is offline john2  United Kingdom
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Default Pulley

One please- brass if pos
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Old 25th June 2006, 02:37 PM   #357
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Location: Tampa
Brass if possible. Aluminum will do. Having a pulley of some sort is most important.
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Old 25th June 2006, 08:34 PM   #358
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Location: Berlin, Germany
Hi Dave,

brass if possible, aluminum will do.
Please increase my order to three pulleys, thanks...
__________________
Brutalized by bass
and terrorized by treble...
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Old 26th June 2006, 05:17 AM   #359
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Join Date: Feb 2006
Location: Willy, VIC
Answers to some emailed questions:

Quote:
Do I leave the battery plugged in at all times?
Yes the battery can be left plugged in all the time. It is best to leave it on float (trickle) charge. For extended fallow periods you can isolate the battery using the switches provided. The battery will last a year between charges as long as it is fully charged at the beginning of this period. It is never safe to leave the battery in a discharged state.

Quote:
Do I unplug the power supply from the wall when I
am using the battery as a power source to run the
motor
The power supply can be left on all the time. It should be switched out of circuit when using the battery then back into circuit for charging. During extended fallow times as above it can be disconnected.

Quote:
A question , I was talking to (x) and he mentioned
that you were working on a revised version is this true?
Yes, I am working on a new DC drive. Yes, it uses some elements from this one (including the main PCB). No, it isn't a "revised" version of this, it uses an entirely different control principle.

I am pursuing patent protection on this and at this stage my intention is that the control circuitry will be a "black box" so it will not be available as a kit.
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Old 27th June 2006, 01:47 PM   #360
mjounot is offline mjounot  Canada
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Location: Winnipeg
Count me in for one pulley
Mike
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