Philco Model 91D Console Radio (1933)
This beautiful model 91D highboy (where the D stands for "with doors") was introduced in the early summer of 1933. It uses
a large 9-tube chassis, introduced the previous summer, that was one of the first to use the newly introduced Philco 6 volt
tubes. The radio covers the broadcast band from 520 - 1500kc and the police/aircraft band from 1.6 - 3.2mc. It provides a
tuned RF stage, automatic- volume-control (AVC), a bass-compensating 4-point tone control, a shadow meter for precise
tuning and a push-pull output stage using type 42 pentodes (actually wired as pentodes and not triode connected as in
some of Philco's later sets). This model employs the code 126 chassis that drives a single loudspeaker (the 91X of the
same year employed the non-interchangeable dual-speaker code 226 chassis). The original purchase price was $85.
The complete tube line-up is 44 (RF amp), 36 (LO/mixer), 44 (IF), 37 (2nd detector diode-connected triode), 37 (det amp),
37 (audio driver), 42 * 2 (push-pull outputs), 80 (rectifier). The driver is transformer-coupled to the output stage.
The 91 series was a follow-on to the ubiquitous model 90 line that ran until the spring of the previous year. I purchased this
radio from an antique store in restored condition, exactly as photographed. This is a tall radio, standing almost 48" high!
I believe my radio photographed above has the incorrect lower-center knob. According to the parts list on Riders page 3.30
at the NostalgiaAir site, it requires small, medium and large knob sizes. This is in spite of the fact that the internal sticker
appears to show all lower knob sizes as medium (see lower right photograph)! It should have a small rosette similar to that
on the model 90 (though the Philco parts list shows different part numbers for the small model 90 and 91 knobs).
a large 9-tube chassis, introduced the previous summer, that was one of the first to use the newly introduced Philco 6 volt
tubes. The radio covers the broadcast band from 520 - 1500kc and the police/aircraft band from 1.6 - 3.2mc. It provides a
tuned RF stage, automatic- volume-control (AVC), a bass-compensating 4-point tone control, a shadow meter for precise
tuning and a push-pull output stage using type 42 pentodes (actually wired as pentodes and not triode connected as in
some of Philco's later sets). This model employs the code 126 chassis that drives a single loudspeaker (the 91X of the
same year employed the non-interchangeable dual-speaker code 226 chassis). The original purchase price was $85.
The complete tube line-up is 44 (RF amp), 36 (LO/mixer), 44 (IF), 37 (2nd detector diode-connected triode), 37 (det amp),
37 (audio driver), 42 * 2 (push-pull outputs), 80 (rectifier). The driver is transformer-coupled to the output stage.
The 91 series was a follow-on to the ubiquitous model 90 line that ran until the spring of the previous year. I purchased this
radio from an antique store in restored condition, exactly as photographed. This is a tall radio, standing almost 48" high!
I believe my radio photographed above has the incorrect lower-center knob. According to the parts list on Riders page 3.30
at the NostalgiaAir site, it requires small, medium and large knob sizes. This is in spite of the fact that the internal sticker
appears to show all lower knob sizes as medium (see lower right photograph)! It should have a small rosette similar to that
on the model 90 (though the Philco parts list shows different part numbers for the small model 90 and 91 knobs).
Philco 91D.. a 6-leg Highboy cabinet with Doors.
"Philco 91D...6-leg
Highboy cabinet with
doors, supreme tone
quality, bass
compensating tone
control, shadow tuning,
automatic volume
control, floating
chassis, oversize
speaker and other
Philco improvements"
Highboy cabinet with
doors, supreme tone
quality, bass
compensating tone
control, shadow tuning,
automatic volume
control, floating
chassis, oversize
speaker and other
Philco improvements"
A Child can tune with Philco Shadow Tuning...
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