EH Scott Radio Enthusiasts

The Fine Things are Always Hand Made

Hi Folks,

Haven't been here in quite a while!

I have a question about a Super 12.

I have one I want to rebuild(new cap.'s and resistors). Mine MAY have some missing components. I can see that most of the resistors are 1/4 or 1/2 watt, but are there a few larger wattage one's in there also? Have never located a parts list. I do have all the manuals and schematics.

So my request would be if someone could tell me what resistors are of other power ratings-either by location/function on the schematic or by resistance value.

MANY thanks for any help-and we'll get another radio on the road!

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Comment by David C. Poland on March 5, 2015 at 1:33pm

Did you pull Riders information on the Super XII?

In many respects the Super XII is a somewhat scaled down Model Sixteen - simplified power supply with one less rectifier tube, scaled down audio circuit less the push-pull 6J5 drivers.  The remaining parts are pretty much the same. so referring to the Sixteen information may be helpful. 

The voltage divider is a candohm unit riveted to the side of the chassis below the IF transformers, same unit as on the Sixteen and 14 tube Masterpiece. 

Comment by John Berkovitz on February 24, 2015 at 10:58pm


Thanks for the quick reply!

What I really need to know though is the power ratings of the resistors. I can go thru the unit with the schematic and visibly see the size of the resistors. However. I'm sure a few are missing, especially in the power supply section. Sure hate to put in a 1/2 or 1 watt when a 5 watt is required! Apparently a parts list was never published for this model. I'll have to go thru it, i.d. the missing resistors, then inquire about the wattage.

Thanks-I'll be back!

Comment by Norman S Braithwaite on February 24, 2015 at 10:08pm

By the time EH Scott was building the Super 12, they were using resistors that are very reliable and stable.  Chances are that only a few will require replacement.  Most of the original resistors are 20% tolerance and still have resistance within this tolerance.  I recommend that you check the resistors and if you have questions about particular resistors, ask about them.


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