Top view of chassis

Comment

Comment by David C. Poland on February 4, 2024 at 1:35pm

Kim - welcome to the Scott Enthusiasts web site.

Just to be clear, your receiver should have the pair of 6V6 output tubes at the rear in the middle behind the tuning cap cover, which location signifies a Super 12.

The two additional control shafts were indeed a late version enhancement of early 1940, just before the introduction of the Scott 14 tube Masterpiece which moved the output tubes to a larger 3 tube power supply. I had such a 6 control Super 12 with the 2 additional controls, but never got to a restoration.

Accordingly, I suspect your one tube outboard power supply may have the upgrad to use a 5U4 rectifier (rather than a 5V4) as per a one page addendum to the instruction manual. Do your tube sockets have embossed tube numbers?

Per the addendum, the two additional controls are:

lower left: radio/phono switch

Lower right:  Sensitivity.

If so, the radio phono switch was moved away from the band switch to accommodate  the optional 5th band: the ultra high TV audio red band mine had, but your dial lacks.

Looks to me like your receiver chassis is missing the left rear corner coil assembly, which corner initially held the power transformer. After a few months production, the power transformer and rectifier tube was relocated to the separate 1 tube chassis you show in one of your photos.

So, the TWO adjustment hole covers on the left middle coil can look like the early version Super 12 when the power transformer was located on the receiver left rear corner.  Your serial number is low, so  maybe your early  production radio was returned to the factory for some reason, and was updated with the additional 2 controls and converted to the outboard power supply. (FYI, there is some history of Scott updating a radio that had been sent back to the laboratory for repairs, to meet the later build specs.)

Remember, prior to WW2, Scott was a custom set builder, building each radio upon receipt of the purchase order. A given model's design evolved  a bit during the year or two's production life. 

Comment by KIM L BOWERS on February 2, 2024 at 7:58pm

I purchased this GE HJ 905 from 1939 to install the Scott in  Has a flat front wich I can remove and replace.  I will need escutcheons and a tuning eye shield.  I am guessing I could have bought the knobs  and one tube shield I neede cheaper and easier from you

Comment by KIM L BOWERS on February 2, 2024 at 7:53pm

Comment by Kent King on February 2, 2024 at 4:06pm

Oh - you have a complete set then, but the tuner chassis is rather unique: I have not seen one where it obviously had the power transformer removed and then added the outboard power supply. A neat set - well worth restoring and keeping!! 

Comment by KIM L BOWERS on February 2, 2024 at 3:12pm

Comment by Kent King on February 2, 2024 at 9:53am

Don't buy any more parts off ebay - I can provide anything you need at lower cost. I have roughly a hundred parts chassis to work with. 

The most critical item is you are missing the power transformer that should be located in the lower right of this picture. I'll see what I have on hand but Super XIIs are not a "common" Scott - we might have to find one. There appear to be some tubes missing too, this chassis is a puzzler - but it is a Super XII.

Scott was a custom builder - so many sets differ from the "published" info - this is clearly one of them. Oh, that serial number is new to my database, but is in a series of Super XII sets as we'd expect.

Kent