[ARC5] Ceramic Versus Phenolic

[Brian]

Hello Wayne,

I can think of two reasons:
  1.. logistics, is, what was available at the time of manufacture 
  2.. humidity vs Voltage; a glazed ceramic socket will absorb very little water compared with phenolic; so, at high altitude in a non-pressurised aircraft, there will be lots of condensation, with the possibility of high-Voltage flashover.

73 de Brian, VK2GCE.

On Tuesday, January 12, 2016 10:09 AM, you said:

Any of y'all know if there is a rhyme or reason why sometimes ceramic octal tube sockets are used in WWII vintage equipment and sometimes its phenolic tube sockets?  

I would think that ceramic would be superior but does the application matter as to which is used?

Somewhere I have the remains of a WWII vintage BC-357 or something like that and it has ceramic tube sockets.  Most equipment seems to use phenolic ones.

Thanks,

Wayne
WB5WSV 
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