Mystery Emerson Radio

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The F.M. section is only on the radio with miniature tubes.

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Hello All!

I'm brand-new to the forum, and looking forward to participating. 

For my first post, I have a radio that I picked up for a few bucks at a local flea market. It is branded as "Emerson Radio and Phonograph Corporation, and the model tag on the bottom of the chassis reads "Model 556 Series B", rated at 105-125 Volts AC/DC, with a 35-watt draw. The front of the chassis has four controls: Volume, tone, a rotary switch labeled AM-FM which turns the power on but has only on and off positions, and the tuner knob. The tuning indicator only shows AM frequency numbers, not FM. I tried to find a schematic, but the only one I found that claims to be for an Emerson 556 shows both AM and FM circuits, and shows one less tube than my chassis has. I tested the radio through a variac and it actually works beautifully, but as an AM radio with no FM. I pulled the chassis from the cabinet and confirmed that the on-off switch was indeed just on-off - only two contacts seen on that switch. I'm stumped! Did someone put an AM-only chassis in this AM/FM-labeled cabinet, or is this some kind of rare factory mistake or oddity?



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