Model 301 Equasonne
Download schematics for the 301 AC Model

Download schematics for the 301 DC Model

Selector

RF Amplifier

Power converter

Speaker

Tubes

Service Notes
A view of a Model 301 Equasonne with the doors closed. Photo courtesy of Doug Houston.
The model 301 (manufactured 1929) came in an AC version and a DC version.  The 301 uses the same "tubeless" selector unit as the 591, 593 and 931.  The Model 301-A is slightly different than the regular 301 in that it used the tuning selector unit with the additional 484/485 tube that is common to most Equasonne models.

The 301AC model is a 10 tube radio.  The DC version lacks the pair of 281 half wave rectifiers, and is thus an 8 tube radio.

The RF amplifier unit of the 301 is of the 931 type and is common to virtually all Equasonne models.

The power convertor unit of the 301 AC differs from most Equasonnes in that it utilizes a pair of 281 half wave rectifier tubes as opposed to the more common use of a single full wave rectifier tube.  This convertor was also used in models 740 and 750.  As usual, the convertor houses the power output tubes, which are a pair of 250s in push pull.
A view of a Model 301 Equasonne with the doors open. Photo courtesy of Doug Houston.
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