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Old 29th August 2011, 07:57 AM   #11
jrobson is offline jrobson  South Africa
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I don't mind looking for something, as long as it's available and I agree for the price it's excellent value, I've been through the tubelab site a few times finding information here and there which has been a great help in understanding how everything works.

Thanks I won't go too high on the voltage
Thanks, jpeg, great help with the wiring and caps, I was just wondering if there was a specific reason other than size, I can fit motor runs I think for the most part
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Old 29th August 2011, 08:11 AM   #12
jrobson is offline jrobson  South Africa
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I don't want extra power as in watts just more "torque" for the low end if that makes sense
Reviews have suggest the XLS have just that, but the problem with Internet reviews are that they are of course free... lol.
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Old 29th August 2011, 09:09 AM   #13
jrobson is offline jrobson  South Africa
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Sorry for being a little thick, but from the tubelab site it says the 6.3V doesn't have to be CT for the 300B tubes, how would one wire this up?

Last edited by jrobson; 29th August 2011 at 09:12 AM.
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Old 30th August 2011, 04:49 AM   #14
Jpeg is offline Jpeg  United States
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First you would want to set the board jumper as shown here.
Final Assy

And you would want to hook one 6.3v lead to T8, and the other to T7. If you have no center tap you would leave out T6. If you do have a center tap that goes on T6.

The idea is if you use both 6.3 volt leads, you get 6.3 volts (in this case regulated down to 5 volts by U1) but if you were to only conect to one of those, and the center tap, you would get 3.15 volt instead. This make the transformer more versitile.

Hope this helps.
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Old 30th August 2011, 06:21 AM   #15
jrobson is offline jrobson  South Africa
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Thank you again
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