It probably has a power cutback to either 250 or 500W...possibly both. I've worked on one of those McMartins a long time ago...not a bad rig. 160 conversion is EZ...80 not quite so but doable.
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Ham shack...AM side: Knight-Kit T-60, RME-45
Vintage SSB side: National 200
Modern SSB: Kenwood TS-180S
MFJ tuner, 130' dipole
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