[ARC5] Glass or Metal Tubes Preferred for Receivers?

[D C _Mac_ Macdonald]

Would 1943 vintage metal tubes not have the
leakage problem? 
 
73 de Mac, K2GKK/5 in OKC 

Sent from my iPhone

On Feb 6, 2018, at 16:15, Richard Knoppow <1oldlens1 at ix.netcom.com> wrote:

  Early in the life of metal tubes they had a bad reputation for leakage. I think this was solved after a short time but the reputation stuck.

> On 2/4/2018 7:25 PM, J Mcvey via ARC5 wrote:
> 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:
> 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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-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL
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