Gift: ERLA Model S-11 #16149

[teevee]

Usually, the RF stages were in the 1,3,5 tube positions, (separation to avoid feedback), and the audio amps in the 2,4 position. Easy enough to figure out, you can start at the antenna or speaker term and trace them out..
1. all the filaments lit? If so, check the plate voltages. Usually, the audio transformers primary windings are open (corrosion) so no plate voltage. Secondaries are not immune..

[Fran604g]

Originally Posted by teevee

Usually, the RF stages were in the 1,3,5 tube positions, (separation to avoid feedback), and the audio amps in the 2,4 position. Easy enough to figure out, you can start at the antenna or speaker term and trace them out..

That's exactly what I discovered while I traced out the schematic on my own. Initially I had some difficulty trying to understand the relationship between that hand-drawn schematic I posted back on pg.1, and what was going on with the actually physical layout of the circuitry.

I did eventually identify a few inaccuracies between that suspect schematic, and my radio. Other Model S-11's could be different I suppose (that was very typical for the antique talking machine industry of the same period - and throughout its entire earlier history), but I've reconciled most of my difficulties in understanding what's going on. Thanks for your input.

Originally Posted by teevee

1. all the filaments lit? If so, check the plate voltages. Usually, the audio transformers primary windings are open (corrosion) so no plate voltage. Secondaries are not immune..

I determined both xformers are open on all 4 windings, sadly, and I won't pursue powering the radio up anytime soon. I'm happy with it being a shelf queen for now. If/when I ever do proceed beyond this point, I'll probably build a battery eliminator, so that I might be able to add more even earlier TRF radios (and especially a "homebrew") to my fairly extensive acoustic phono collection.

Maybe.

With over 30 acoustic spring-wind machines in my home, ranging from 2 minute cylinder players from as early as a ca.1895 Graphophone Type N, and many Edison Phonographs; a couple 4-minute Edison Amberolas (including a very nice and HTF oak Model V); several disc machines ranging from a ca.1901 pre-dog Victor Type C; a couple Victrolas; several Diamond Disc Phonographs produced from as early as 1916 to as late as my ca.1927 Edisonic "Schubert" (and also including an Edison "Long Playing" Model 1-C Phonograph); and books. Tons of books, too. All this takes up the entire downstairs of my home, and a little of my barn.

They're my true passion.

Oh, yeah, and then there's the "Audiophile" stuff, too. Space is always at a premium, as we all know.

Best regards,
Fran

[init4fun]

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