alberto telo's Page

I'm modifying my comment - check for 500 ohms (not 500K). Although this doesn't appear on the AW12 diagrams, if you look at the AW15 diagram, these two resistors are there in the early (Wunderlich) AW15 diagrams. The 50? resistor is shown as 500 ohms. So if you do read something close to that (if the resistor reads at all) - I'd go with 500 ohms - based on the early AW15 diagram.

The burned area only obscures the multiplier dot. We can see enough green and the black end to know it is 50<something>. Most of the schematics don't have resistor values - but I'd do this - (1) read it with an ohmmeter; if it is close to 500k (which would be grn-blk-yellow dot), I'd go with that as a replacement. A modern 470k is the standard value component and should work. That's about what I'd expect in the circuit here.

The Scott recommended replacement for the Wunderlich tube was a Type 55 tube with a wire connected from the grid cap to one (either one) of the diode plate pins.  Not all Arcturus Wunderlich tubes were blue glass and a couple other companies made equivalents although the equivalents are rare.

Norman 

If there is a grid cap wire from below the chassis inside the tube shield for the 55 tube, may be the suggested conversion to use a 55 tube. The proper blue glass Arcturus Wunderlich tube was a 2.5 volt 6 pin tube with no grid cap. The Wunderlich tube was a low production tube which became unavailable. A number of AW-12 (and AW-15) Scotts used the Wunderlich for 2nd detector, and were later modified for Scott suggested use of the 55 substitute.

The Wunderlich tube socket has dark red center button instead of a tube number. 

Alberto - In Info Archive, in set folders, your set folder is Allwave Deluxe.

There are two owners manuals. Suggest you read through both. but print the one with Art Deco graphics on the cover, as it is for the AVC version with your 12 inch pedestal speaker.

The "Deluxe"  was for the single dial tuning, but it still evolved considerably from mid 1932 to mid 1934, with improvements in the tube line up, the speaker (single 11 inch, then twin speakers and finally Spring 1933 the Jensen pedestal you have), introduction of the rare Wundrlich 2nd detector tube December 1932 for AVC, and so on. Not all versions can be found with the exact circuit diagram. So if yours differs in some way, and the wiring looks original, then stick with the actual wiring you have.

Remember, Scott was a custom set builder. Each set was built upon receipt of an order. Scott was chasing performance and audio quality,  and Scott made design changes in pursuit of improved performance during a model run. Think of the hand built Rolls Royce automobile.

Restored, the AW-12 (aka Allwave Deluxe 12 tube) is a sensitive set with good audio for an early 1930's radio.