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| Above and below: Front panel views. |
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| The model number is identified on the front panel. On top of the radio is additional identification which indicates Type 38758-YSW-4a2, Spec 38759 and wavelength range from 12 to 240 metres. |
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| This particular receiver came with four sets of coils covering 12 through 85 meters. A notation on the schematic says that two optional coil sets were available to cover the rest of the tuning range. |
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| The receiver was
also accompanied with an internal factory memo dated April 22nd, 1933
and details alterations that were made "for operation with the automotive
series of tubes". It uses 2 x 236, 1 x 237 and 1 x 238 type tubes. These
are RCA's [1] version of the standard automotive types 36, 37, and 38.
Other manufacturers of the period who made the 36, 37 and 38 tubes used
their own designators. As an example, Cunningham produced these tubes
as 336, 337 and 338. Some 2xx series receiving tubes bear the prefix UY
indicating the base type.
On the schematic, these tubes are designated as '236, '237 and '238 and a best guess says the apostrophe likely represents anything that the draughtsman wanted it to be. It could stand for RCA or UY [2] . The number 2 is a designator for the RCA company. To study the characteristics of these tubes, please refer to types 36, 37 and 38. |
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| In the three interior photos above, the Range 2 (19 to 30 metre) coils are in place. |
| All photos in this table by Wayne Mackin |
