[Hallicrafters] New resistor sizes

[TC Dailey]

Recently, I ordered some replacement resistors from Mouser, and noticed that the 1w devices were the size of what HAD been 1/4w, and 2w sizes were the same size of what HAD BEEN the 1/2w.  In correspondence with the Vischay rep, this is what came out of their TechSupp folks.


 
Carbon Composition Resistors (which are going obsolete) did not have a ceramic core and were not as efficient at dissipating heat into the leads. By using metal film on a ceramic core more power can be applied to a smaller part. By the same token the large resistive area of the carbon composition resistor allowed for improved pulse voltage handling characteristics than the ceramic core technology.



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As such, should you need the same PHYSICAL SIZE resistors to "reach" from point-to-point, you'd better buy higher-wattage devices to not only LOOK right, but also, to ensure that the leads can REACH.  i.e. "not all improvements, are"



Tom Dailey

WØEAJ

 

 

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