Sir Doug. . . . . .

Whut . . . no one wanna talk 2 U . . . .?

Now, with a missing speaker, that would also suggest it also being short of the audio output transformer that was connected to the frame of the old speaker.

BUT the unit is showing its utilizing the newer generation Permanent Magnet speaker versus the old generation type of dynamic speaker.

As such, there is a filter choke present in the set. You now just need to scrape up a dupe of the original speaker size used in the set. Which might have been a 12 inch or if in a smaller cabinet, possibly a 10 inch or an 8 inch speaker.

With the 6F6 output tube being used, is suggesting of the need of a 7K primary on that missing output transformer , and its output impedance of the secondary assuredly being of 3.2----4 ohms.

Now which way do you want to go . . .

I see that PTOP may still have a push pull transformer that has 1/2 of the 7k+7K primary good on his listed # 1210-720:

http://www.oldradioparts.com/2a23dfl.txt

1210-720 . . . . . OUTPUT STANCOR A-3304 P-P (10K/7K) 1/2 BAD, USE AS S-P to 4/8/16, 25W, FIG 1, US 1 2 1/2 3 1/8 3 5/8 . . . . . $4.75

And one is only needing one half of that transformer primary winding being used, with your single 6F6 tube AND acquiring its massive 25 WATT rating to boot . . . . . (AKA 1000 hp . . super turbocharged with nitro injection) . . all in a 2 1/2 by 3 1/8 by 3 5/8 casing profile.

That would then additionally be dependent on locating the speaker, possibly from his selection also, or looking in to modern auto speakers which now sometimes drift towards 4 ohm voice coils values rather than the common 8 ohm home stereo speakers.

Or, you could just let price go astray, and pay for decades of dollars for a new Hammond output transformer and get its match to a 8 onm voice coil of any speaker of your choice.

73's de Edd