08-02-2009, 10:56 AM
Okay, here we go...
March 15, 1933: The AM-only Model 89 was modified to add the "police" band (1.5 to 3.2 mc). A fourth control was added between the tone and volume controls - this was the band switch, which was combined with the set's off-on switch, the off-on function being removed from the volume control. At this time the 89 chassis became Code 123.
The new 89-123 still used a 36 tube as an autodyne mixer-oscillator.
The change to a 77 tube did not occur until September 1, 1934 - during the 1935 selling season. The 89 chassis remained Code 123, and would remain so through the end of its production around early spring 1936.
Yet Bulletin 146B, covering the 89 Code 123 with a 77 tube, was not published until September 1935, one year later!
Don't ask me why - I wasn't around then.
Philco was not consistent with its code number changes; just take a look at Model 60, which underwent numerous changes during its three year run yet remained Code 121 throughout.
March 15, 1933: The AM-only Model 89 was modified to add the "police" band (1.5 to 3.2 mc). A fourth control was added between the tone and volume controls - this was the band switch, which was combined with the set's off-on switch, the off-on function being removed from the volume control. At this time the 89 chassis became Code 123.
The new 89-123 still used a 36 tube as an autodyne mixer-oscillator.
The change to a 77 tube did not occur until September 1, 1934 - during the 1935 selling season. The 89 chassis remained Code 123, and would remain so through the end of its production around early spring 1936.
Yet Bulletin 146B, covering the 89 Code 123 with a 77 tube, was not published until September 1935, one year later!
Don't ask me why - I wasn't around then.
Philco was not consistent with its code number changes; just take a look at Model 60, which underwent numerous changes during its three year run yet remained Code 121 throughout.
--
Ron Ramirez
Ferdinand IN
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