[ARC5] Glass or Metal Tubes Preferred for Receivers?

[J Mcvey]

Don't know about the lifespan, but the metal does provide shielding that will not be present with the GT....
 

    On Sunday, February 4, 2018 9:07 PM, D C _Mac_ Macdonald <k2gkk at hotmail.com> wrote:
 

  <!--#yiv8510388209 P {margin-top:0;margin-bottom:0;}-->Is there a performance and/or lifespan difference between the tubes?  I.E., 12SK7 or 12SK7GT preferred? 
73 de Mac, K2GKK/5
(Since 30 Nov '53)
Oklahoma City, OK
USAF Retired 61-81
FAA Retired 94-10
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