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HRO-500
Look at the main tuning dial mechanism, and compare it to the HRO-MX that appears at the beginning of the spook radio section of this web page. The dial may be chrome on the 500, but it is the same 1930’s design as on the MX, in which an eccentric shaft causes a planetary gear under the outer dial skirt to read frequency directly in kilohertz in the uppermost of the five narrow windows in the knob skirt. The rest of the radio bears little resemblance to the MX, however. Completely solid state, the HRO-500 was stable, accurate and for the most part reliable. Some of its early germanium transistors are a bit hard to find these days, and its Wadley loop synthesizer circuit tends to get a bit funky as parts age, requiring frequent alignment, but it’s still a favorite with many radio collectors for its beautiful esthetics. A pristine, well running HRO-500 still brings in excess of $1500 if you can find one, and the LF-10 preselector (pictured below the receiver) can cost you up to $1000 more. But many find it worth. |
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Make something good happen.
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The National HRO-500 hails from the mid-60’s and was the high quality general coverage shortwave successor to the NC-400.  |
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