Possible AW 23 version 2 power supply diagram

[Jeff M]

Hi all,

I have been digging into the schematic and diagrams for my AW 23 power supply. I stitched together the 2 power supply diagrams that I have into a diagram that matches the physical power supply I have in hand. 

The C4 capacitor pack and both sockets (speaker and set) are screwed in with bright nickel flat head screws. It looks factory to me but who knows. Maybe this PS was originally manufactured while the engineers were testing new designs.

Is there a version 2 power supply diagram I can verify against?

Thanks in advance.

[Thomas Day]

Jef:

I have the service manuals for both the 5 and 7 knob all wave 23 from Radio Daze and the schematic sections of this web site. It didn't occur to me that they were different until I saw your post. I have the early 5 knob version, for which I had to have a new power transformer built. It has been worked on before I got it, so not sure how it was built originally. At the time I only had the late version 7 knob service manual to go by. I also have a late 5 knob chassis that has been badly messed up, but it has the later antenna input for the double doublet antenna system. It will take a lot of work to put it back into operation, and the chrome is rough. No power supply for it tho. It looks like the only difference between the power supplies is how the speaker socket is wired, and the .25 MFD caps across the input to the filter chokes are installed. There ae also differences in the connections to the headphone jack. 

Thom

[David C. Poland]

FYI - the Scott News article (October 1936  - Volume 9 #5) has an extensive article on the New Super Shield Antenna Coupling System.  And Scott offered to update older sets with this feature for $15 - page 5. Hence, an explanation of your having the earlier 5 knob AW-23 with the additional antenna post. With this new feature, the oft seen external antenna switch hung on a tube shield was no longer supplied on new production, nor needed for your updated receiver. The benefit was reduced noise and increased sensitivity on weak stations with the Scott Super Antenna (a double doublet design.)

Once again, the value of having both diagrams at hand during a restoration.

[Thomas Day]

David: My early all wave 23 has the antenna adaptor. It is currently connected to a long wire antenna using a coax feed directly to the antenna post. Not the ideal setup, but what I can do for now. I have the information on the double doublet antenna, but without part value documentation, it would not be easy to replicate. Probably also

doubt if any copies still exist.

Thom