[Hallicrafters] SX 101A Challenge

[Anthony W. DePrato]

One of my SX 101A's was doing this and i found it to be a very dirty tube 
socket pin. it was a high resistance contact due to the oxidation.  i used 
a dental brush with cleaner on it. the type of brush that goes between your 
teeth (tapered ) both Gum and Oral-B make them . i now keep one on the 
bench and make it a habit to clean all tube sockets with it.
good luck
73 Tony wa4jqs
Anthony W. DePrato WA4JQS
South Sandwich Island Antarctic Dxpedition Group
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CQ DX HALL OF FAME # 35