05-22-2013, 07:32 AM
Maybe they were marketing the 38-14 to areas that still had DC power but with the ability to run on AC power as well? I don't know, just a guess. Did you notice the SW band on the 38-14 is not the same as a 38-15?
Oh, and in case you were thinking about using a 38-14 speaker in a 38-12 or 38-15, you can't...the 38-14 speaker's field coil resistance is around 3000 ohms or so (don't have a schematic in front of me so I'm guessing).
You can replace the speaker in a 38-14 with a PM speaker and safely omit the resistance as the field connects between B+ and B-. The field coil in the 38-14 is only there to excite the speaker, it does not do anything else in the radio circuitry.
Oh, and in case you were thinking about using a 38-14 speaker in a 38-12 or 38-15, you can't...the 38-14 speaker's field coil resistance is around 3000 ohms or so (don't have a schematic in front of me so I'm guessing).
You can replace the speaker in a 38-14 with a PM speaker and safely omit the resistance as the field connects between B+ and B-. The field coil in the 38-14 is only there to excite the speaker, it does not do anything else in the radio circuitry.
--
Ron Ramirez
Ferdinand IN
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