Rare Hallicrafters TU-50 and TU-51 tuning unit for the HT-4 series and/or BC-610 transmitter. The TU50 has a date on it of March 49, while the TU51 states May 49. These were plug in units for the HT-4 and/or the BC-610 transmitters. The TU-50 covers 4 thru 5 MHz while the TU-51 covers 5 thru 6.35 MHz. If you are a Hallicrafters collectors or have the HT-4 or BC610 transmitter than these plug in units are just what you've been looking for.
Selling both together as a set for $25.
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